Ethylene oxide (EO) is a pivotal derivative in the ethylene industry,which is next to polyethylene in importance.Silver (Ag)-based catalysts exhibit exceptional performance in the epoxidation of ethylene to EO.The RS-891 catalyst,synthesized via the impregnation method,was characterized using X-ray diffraction (XRD),scanning electron microscopy (SEM),mercury intrusion porosimetry,X-ray photoelectron spectroscopy (XPS),and oxygen temperature-programmed desorption (O₂-TPD) to elucidate its structural and chemical properties.The catalytic performance of RS-891 in the epoxidation of ethylene to produce EO was systematically evaluated.The results demonstrate that the α-Al₂O₃ support utilized in the RS-891 catalyst possesses a lamellar structure with an interlocking configuration,which enhances the mechanical strength of the support and promotes the uniform dispersion of silver nanoparticles.This structural feature effectively mitigates nanoparticle aggregation,thereby extending the operational lifespan of the catalyst.Laboratory evaluations conducted over 1 500 h,corroborated by industrial operational data,indicate that the RS-891 catalyst achieves an EO selectivity exceeding 88% after 100 h of operation,with a consistent upward trend in selectivity thereafter.Once selectivity surpasses 88%,the catalyst maintains stable and reliable performance,ensuring high catalytic efficiency.The close alignment between industrial application data and laboratory results underscores the exceptional stability of the RS-891 catalyst,highlighting its significant potential for industrial applications and substantial economic value.

In order to improve the phenomenon of micro-pores caused by water evaporation in the film forming process of epoxy acrylate emulsion,four different oxidized polyethylene waxes XW-17,XE-16,PED522 and 629A were used to modify the epoxy emulsion.Due to the high melting point of oxidized polyethylene wax,it was used as a functional monomer to modify epoxy acrylate,and its optimal amount was studied.Finally,epoxy emulsion was prepared by soap-free core-shell emulsion polymerization.Fourier transform infrared spectroscopy (FT-IR) confirmed that oxidized polyethylene wax was successfully introduced into epoxy acrylate.The optimum addition amount of oxidized polyethylene wax was determined by cross-linking degree and water absorption.The microstructure of emulsion before and after modification was characterized by transmission electron microscopy (TEM).Thermal weight (TGA),static water contact angle and atomic force microscopy (AFM) were used to test the emulsion dry film before and after modification.The results showed that the addition of oxidized polyethylene wax could improve the thermal properties and roughness of the emulsion dry film,but did not change the hydrophilicity of the emulsion dry film.The optimum addition amount of oxidized polyethylene wax to modified epoxy acrylate was mass fraction of 0.3%,and the modified emulsion with 629A had the best performance.

Using waste lubricating oil as the feedstock,the effects of reaction temperatures on the hydroconversion characteristics,product distributions and properties were investigated with oil-soluble Mo-based catalysts and solid Fe-based catalysts.The results showed that the hydroconversion products of waste lubricating oil with reaction temperature are similar under two different catalysts.As the reaction temperature increased,the heavy oil conversion in waste lubricating oil significantly improved,primarily generating C₆-C₁₂ naphtha fractions and C₁₂-C₂₅ diesel fractions.At a reaction temperature of 450 ℃,the heavy oil was completely converted,with the combined yield of light oil reaching 92.35%.The content of impurity elements S,N,and O in the liquid products significantly decreased,while the H/C atomic ratio increased.The content of aliphatic hydrocarbons decreased,and the content of aromatic hydrocarbons slightly increased.Additionally,macromolecular hydrocarbons underwent polycondensation reactions on the surface of the solid products,forming micron to submicron spherical particles.

A series of catalysts with different metal and support were synthesized by chemical fluid deposition (CFD) method using supercritical CO₂ as solvent.In this work,hydrodeoxygenation of 2-methoxyl-4-allyl phenol was applied for investigating the performance of different catalysts.The effect of support (SBA-15, SO₄^2-/ZrO₂,HY) and content of different metal (Pd,Pt) on conversion and selectivity were investigated.While the effects of reaction condition on the conversion of reactant and selectivity of product were also evaluated.It was shown that the conversion of 2-methoxyl-4-allyl phenol and selectivity of high carbon number aromatic hydrocarbons could reach 98.0% and 94.2% respectively when SO₄^2-/ZrO₂ was support,m(Pd)∶m(Pt)=3∶1,total mass fraction of 3%,reaction temperature was 300 ℃.

By adding silane reagent to intervene in the crystallization process of TS-1,the directional aggregation of nanocrystalline grains was achieved,and thus continuous and dense titanium-silicon molecular sieve membranes were prepared by bridging on micrometer-sized spherical carriers.Its structure was characterized by various analytical methods(SEM,XRD,FT-IR and UV-Vis),and its catalytic activity for the direct epoxidation reaction of chloropropene was examined.The experimental results showed that the TS-1 titanium-silicon molecular sieve spherical membranes prepared by the bridging method had higher homogeneity and densification,which improved the stability of the membrane layer during the epoxidation reaction.The selectivity of chloropropylene oxide,the yield of chloropropylene oxide,the conversion of H₂O₂,and the effective utilization efficiency of H₂O₂ reached 95.61%,86.93%,97.54%,and 93.21%,respectively.And there was no obvious decrease in the reaction activity after three cycle experiments.The TS-1 titanium-silicon molecular sieve membrane prepared by the bridging method is easy to be recycled and can be reused while maintaining its catalytic performance.

A series of tungstovanadophosphoric heteropolyacid catalysts H₄PW₁₁VO₄₀,H₅PW₁₀V₂O₄₀,H₆PW₉V₃O₄₀ and H₆P₂W₁₈O₆₂ were prepared by conventional aqueous solution and ether extraction methods.And the structures of tungstovanadophosphoric heteropolyacid catalysts were characterized by powder X-ray diffraction (PXRD) and infrared spectroscopy (FT-IR).The tungstovanadophosphoric heteropolyacid catalysts were used in the catalytic synthesis of tributyl citrate,and the effects of different heteropolyacid structures,reaction temperature,alcohol/acid molar ratio,catalyst dosage on the esterification of tributyl citrate were investigated.The results showed that H₆P₂W₁₈O₆₂ had the highest catalytic activity,and the average esterification of tributyl citrate could reach up to 95.9% when reaction temperature was 150 ℃,alcohol/acid molar ratio was 4∶1,and catalyst dosage was 0.15 g.

In this paper,TiO₂ powder and UiO-66 were obtained by sol-gel method and solvothermal method respectively.Then UiO-66@TiO₂ composite photocatalyst was synthesized.Composite nano-photocatalyst UiO-66-NH₂@TiO₂ was prepared by solvothermal method using titanate(C₁₆H₃₆O₄Ti) as the Ti source,2-amino benzoic acid as the -NH₂ source,benzoic acid as crosslinker,and UiO-66 as the carrie.By in situ infrared spectroscopy (FT-IR),ultraviolet diffuse reflection (DRS),field emission scanning electron microscope (SEM),energy spectrum (EDS),N₂ adsorption-desorption,X-ray photoelectron energy spectrum (XPS) and X-ray diffraction (XRD),the structure,morphologe,shape of prepared TiO₂,UiO-66,UiO-66@TiO₂,UiO-66-NH₂ and UiO-66-NH₂@TiO₂ were characterized.Catalytic performance test was applied in photocatalytic degradation of methyl orange (MO) solutions.The test results showed that the degradation of 50 mL 5 mg·L^-1 MO solution in 160 min was 92.35% under the condition of 0.800 g UiO-66-NH₂@TiO₂,and pH=1.Therefore,it can be proved that UiO-66-NH₂@TiO₂ has high photocatalytic activity.

The catalytic hydrogenation of p-chloronitrobenzene to synthesize p-chloroaniline is an important organic chemical reaction,and the key to this catalytic reaction is to realize nitro hydrogenation and reduction without dechlorination.N-doped modified Pt_0.3/N_xC catalysts were prepared by an impregnation method,which showed that the metal-carrier interactions induced by N-doped activated carbon carriers improved the activity,selectivity and stability of the catalysts,while inhibiting the C—Cl bond breakage.Among them,the average particle size of Pt nanoparticles on the surface of the Pt_0.3/N_0.2C catalyst prepared by using a mass ratio of urea to activated carbon of 0.2 was the smallest and uniformly dispersed.The catalyst exhibited excellent conversion (100%),selectivity (99.0%) and reusability for the catalytic synthesis of p-chloroaniline from p-chloronitrobenzene hydrogenation at 50 ℃,0.5 MPa,and a reaction time of 90 min.

Research progress on catalysts of 4-tertbutylphenol via alkylation of phenol was outlined,and solid acid catalyst,supported solid acid catalysts,resin catalysts and molecular sieve catalysts in the application of 4-tertbutylphenol alkylation were introduced.It was pointed out that the development of catalytic performance and environment friendly alkylation catalysts was the future of 4-tertbutylphenol industrialization research direction.

This paper discusses the reaction mechanism of methane dry reforming (DRM),including the microscopic mechanism of the key steps and the main factors affecting the reaction path.The properties and characteristics of various catalysts used for DRM,including metal oxide and metal carbide as support catalysts,and precious metal and Fe,Co,Ni as active component,are comprehensively evaluated,and their advantages and disadvantages in catalytic activity,selectivity and stability are analyzed.In addition,this paper also focuses on the mechanism of additives in improving catalytic performance,and how to optimize the overall performance of catalysts by regulating the type and dosage of additives.Finally,the application status of methane dry reforming technology in industrial production is summarized,and the future development direction is proposed.

Taking ExxonMobil for example,this paper examined the patent application trends and technical routes for the related patents of metallocene polyethylene as cataloged in the Derwent patent database.By February 29,2024,ExxonMobil has submitted 175 patent applications related to metallocene polyethylene,including 59 in China.The analysis revealed that ExxonMobil has a comprehensive patent layout,including metallocene catalyst designs,polymerization processes,applications and modifications of metallocene polyethylene.The patent layout of ExxonMobil in China was basically consistent with that in the world.However,ExxonMobil emphasized catalyst design in its global layout,and payed more attention to application technology in its patent layout in China.Combined with the analyzed results above,some suggestions were given for domestic relevant enterprises and research institutions to deploy technical forces.

Excessive emissions of carbon dioxide have caused serious environmental problems,especially global warming and ocean acidification.The electrocatalytic CO₂ reduction reaction (CO₂RR) is one of the most promising methods for converting CO₂ into high-energy-density fuels or high-value chemicals. Because of their low cost and high selectivity for C₃ products,copper-based catalysts have garnered a lot of attention as efficient electrocatalysts for the reduction of carbon dioxide to multi-carbon compounds.This paper summarizes the research progress of copper-based catalysts for CO₂RR to generate C₃ products in recent years,including the reaction mechanism of CO₂RR to generate C₃ products,and improving the electroreduction performance of copper-based catalysts through structural regulation,surface regulation,bimetallic and other strategies.Finally,the key challenges and future research directions in this field are outlined to provide ideas for further development of highly active CO₂RR catalysts to generate C₃ products.

Propylene oxide (PO) is an important chemical intermediate mainly used in the production of various organic raw materials such as polyether polyols and propylene glycol,and is widely used in fields such as food and tobacco.The use of titanium silicon molecular sieve (TS-1) as a carrier to load metal gold as a catalyst for gas-phase epoxidation of propylene has broad industrial application prospects.This article mainly introduces the main factors and catalytic mechanism that affect Au/TS-1 catalyst,including the preparation method of the catalyst,gold particle size,and additives.The main preparation methods include immersion method,sedimentation precipitation method,solid grinding method,ionic liquid method,and colloid method,among which sedimentation precipitation method is currently the mainstream laboratory preparation method for catalysts.The main influence of gold particle size is reflected in the 2 nm gold catalytic effect,which is most favorable for the occurrence of propylene epoxidation reaction.The main additives are alkali metals Na and Cs,which can improve the catalytic performance of the catalyst.The Au/TS-1 catalyzed epoxidation of propylene mainly relies on the dual site synergistic catalysis of Au and Ti sites.How to prepare high-performance Au/TS-1 on a large scale is currently the main difficulty in the industrial application of propylene hydrogen phase epoxidation to produce propene oxide.

The coal-to-ethylene glycol industry in China has developed rapidly,mainly adopting the oxalate ester synthesis process.However,the methyl nitrite (MN) and NO_x emitted from the ethylene glycol tail gas unit of this process are harmful to health.The treatment of NO_x in the tail gas of ethylene glycol produced by the synthesis of oxalate esters using H₂ as the reducing agent through selective catalytic reduction (H₂-SCR) was studied.Pt-based catalysts were prepared by impregnation method using CeO₂,TiO₂,Al₂O₃,SiO₂,ZSM-5,ZnO,MoC and activated carbon as carriers respectively,and their denitrification performance under different temperatures,pressures and space velocities were investigated.The results showed that under the conditions of catalyst loading volume of 15 mL and a volume content of NO and CO in the feedstock gas of 8%,when the TMN-5 catalyst operates at reaction temperature of 220~260 ℃,pressure of 0.1~0.4 MPa,and space velocity of 300~1 000 h^-1,the contents of NO,NO_x,CO,and CH₄ in the exhaust gas all meet the national emission standards.Moreover,the catalyst has good stability in 500 h long-term operation and at high temperature of 500 ℃.

A fully automatic calcination system based on a mesh belt kiln was designed to address the characteristics of strong fluidity,easy spillage,and easy breakage of solid spherical catalysts.The structure and operation process of fully automatic roasting system were introduced,and the industrial application of the 5A molecular sieve solid spherical catalyst was carried out.Industrial applications showed that when using a fully automated roasting system to produce 5A molecular sieve solid spherical catalysts,the yield increased by 42.0%,energy consumption decreased by 25.05%,yield increased by 5.41%,and the crushing and wear rates could be steadily controlled at a low level.After roasting,the product exhibited stable burn off,significantly increased the adsorption capacity of the target substance X,improved roasting uniformity,and significantly reduced the number of operating labor,achieved the goal of improving quality,reducing costs,and increasing efficiency.

In this study,a series of supported perovskite composite oxide nCuO/L {a_{1-}}_xA_xMnO₃ catalysts were prepared by co-precipitation impregnation method for the preferred oxidation of CO in hydrogen-rich gas.The effects of the doping amount of the substituted A-site element Sr²⁺ and the loading of the active component CuO on the performance of the nCuO/L {a_{1-}}_xA_xMnO₃ catalyst were systematically investigated.We also analyzed the impact of the structural performance of the catalyst on the catalytic activity by means of XRD,BET,H₂-TPR.The results showed that when the doping amount of Sr²⁺ was 0.3 and the loading of single-metal CuO was 1.0,the prepared 1.0CuO/La_0.7Sr_0.3MnO₃ catalyst had the best CO priority oxidation activity.At the reaction temperature of 135 ℃,CO could be completely converted and the selectivity was 100%.

A series of catalysts for aromatic nitro hydrogenation were prepared by hot feed method under different conditions.The catalysts were characterized by XRD,N₂ low temperature adsorption-desorption,H₂-TPR,ICP-MS,H₂-chemisorption and particle size distribution,and the catalytic hydrogenation performance of the catalyst for nitrobenzamide derivatives was investigated in a high pressure fixed bed reactor.The results showed that the optimized catalyst,which had large specific surfaces area and good metal dispersion,can be obtained with the temperature at 60 ℃ and pH value at 7.5.The nickel species in the catalyst owned excellent reducibility and good reaction performance.When the reaction temperature,the pressure,the liquid space-time velocity and the hydrogen/oil ratio were respectively controlled at 95 ℃,1 MPa,2.25 h^-1 and 10,the reactants conversion rate was up to 100% and the selectivity was 99.9%.The catalyst under this preparation condition was successfully scaled up to hundreds of kilograms and demonstrated excellent activity during a long-term evaluation process of 1 000 h.This study aimed to provide some references and feasibility for the industrialization of aromatic nitro hydrogenation catalyst.

Cu-Zn-Al-Mg methanol synthesis catalyst was prepared by co-precipitation method.The effect of calcination temperatures on its selectivity and activity were investigated and the catalysts were characterized by XRD,N₂ low-temperature adsorption,TG-DTG and H₂-TPR.The results showed that the catalyst precursor was incomplete decomposition at 250 ℃; when the calcination temperature was (300~350) ℃,the catalyst had the appropriate size of copper oxide crystalline,the catalyst had good selectivity and the best CO conversion; when the calcination temperature was 450 ℃,the copper oxide crystalline size was too big,although the selectivity of catalyst was the best (the liquid phase ethanol content was the lowest),but the CO conversion of the catalyst was the worst.

Co-Ti/Hβ zeolite was prepared by ion exchange method,and characterized by X-ray diffraction,N₂ adsorption and desorption,FT-IR and NH₃-TPD.The activity and regenerability of the catalyst prepared in this paper were systematically evaluated by applying oxygen as the oxidant in the reaction of epoxidation of styrene to ethylene oxide.The results showed that most of the supported Ti and Co metals were scattered on the surface of the zeolite,and the skeleton structure of the β zeolite was not damaged,and the modification of Co and Ti could effectively reduce the acid content of the zeolite.When the loading of cobalt and titanium reached 3%,the conversion rate of styrene reached 92.1% and the selectivity of ethylene oxide reached 83.2%.When using 3%Co-3%Ti/Hβ catalyst,the most optimal reaction temperature was 90 ℃,the most optimal reaction time was 4 h,and the most optimal oxygen flow rate was 30 mL·min^-1.After repeated evaluation of the catalyst five times under optimal condition,the catalyst could still maintained good activity,and the conversion rate and selectivity could reached 90.1% and 82.3% respectively.

Suzuki cross-coupling reaction is a powerful route to construct C—C bond in fine-chemical synthesis.Developing a high efficient method to promote the performance of palladium-based catalyst in Suzuki coupling reaction is of great significance.In this article,a series of catalysts modified by 2,6-diaminopyridine(DAP),Pd(OH)₂/FCN-D-X,are prepared successfully by pre adsorbing DAP molecule onto the surface of the flower-like carbon nanosheets(FCN) through physical adsorption and then loading the Pd active component.It was found that the activities and stabilities of Pd(OH)₂/FCN-D-X in Suzuki coupling reaction are higher than that of the unmodified one,Pd(OH)₂/FCN.The characterization results of X-ray diffraction (XRD),scanning transmission electron microscopy (STEM) and X-ray photoelectron spectroscopy (XPS) showed that the existence of DAP within the catalyst enhanced the dispersion of Pd species and improved the distribution of valence states of Pd leading to high performance of Pd(OH)₂/FCN-D-X catalysts.

Propylene oxide (PO) is a crucial chemical raw material,and the selective direct oxidation of propylene to epoxypropane holds significant importance in the chemical industry.This study investigated the homogenous catalytic system utilizing acetylacetonate metal salts in the propylene epoxidation with cumene hydroperoxide (CHP) as the oxidant.Under optimized conditions of propylene (24 mmol),cobalt acetylacetonate (0.16 mol%),CHP (15 mmol),ethyl acetate as the solvent (20 mL),and a reaction temperature of 95 ℃ for 2 h,the experimental results yielded a propylene conversion rate of 5.2% and a selectivity for epoxypropane of 85.5%.Electron spin resonance experiments indicated that the presence of cobalt acetylacetonate effectively increased the concentration of peroxyl radicals,enhancing the epoxidation activity of CHP and improving the affinity between the active oxygen species of CHP and the C＝C bond of propylene.This results in a higher selectivity for the conversion of propylene to propylene oxide.

The mass hydrogen storage density of methanol is up to 12.5%,which can be used as a hydrogen energy carrier to realize the rapid release and utilization of hydrogen.Methanol reforming to produce hydrogen is an important means to realize the green production and efficient storage and transportation of hydrogen energy,and the catalyst is the key to realize this process.In this paper,the current research progress of Cu-based catalyst used for hydrogen production through methanol steam reforming is reviewed.Building upon existing studies,combing catalyst bulk optimization with microreactor is proposed to prepare a novel catalyst,which is expected to further overcome the defects of Cu-based catalyst and improve the comprehensive properties of catalyst,thus promoting the improvement of hydrogen yield and reduce CO selectivity,laying the foundation for the further development of hydrogen energy technology.

Epoxidation of olefin is an important part of industrial production of high value-added chemical monomers.Howere, traditional thermal catalytic methods not only consume a large amount of energy but also generate high carbon emission due to side reactions, resulting in poor economic benefits.The renewable green electricity drives the electrocatalytic epoxidation of olefin,which provides a new way to prepare high value-added epoxy intermediates in the industrial field.The research progress of electrocatalytic olefin epoxidation was reviewed,including different catalytic systems,catalytic mechanisms,influencing factors and strategies to improve catalytic performance.Finally,the existing problems and future development directions in this field were pointed out,hoping to provide some research references for the design of electrocatalysts,electrode materials and electrolyzers in olefin epoxidation system.

The rapid development of electric vehicles and energy storage industries has led to a sharp increase in lithium demand.In the process of oil and gas extraction in China,a large amount of lithium containing oilfield brine is generated,which has potential resource utilization value.And conducting research on lithium extraction technology from oilfield brine has enormous economic benefits.Selective adsorption method is a promising technology for lithium extraction from oilfield brine with good industrial application prospects.Lithium ion sieve materials are currently the main adsorbents for achieving selective lithium extraction,determining the economic and industrial feasibility of the adsorption and extraction process.The mechanism of lithium extraction,preparation method,forming technology and adsorption of lithium extraction by lithium ion screen materials were systematically reviewed,and the future research direction are summarized and prospected,providing certain technical reference for achieving efficient utilization of lithium resources in oilfield brine.

Hydrogen energy,as a clean and renewable secondary energy source,is an important way to achieve “carbon peak and carbon neutrality”.Proton exchange membrane (PEM) water electrolysis for hydrogen production is one of the promising technologies to realize “zero carbon” emissions because of its high efficiency,compact and pollution-free characteristics.However,the high cost of PEM electrolysis water hydrogen production system has severely limited its large-scale commercial application.In this paper,the routes of water electrolysis for hydrogen production and the basic principle of PEM water electrolysis technology are reviewed,and then the development barriers of the PEM water electrolysis technology are emphasized,including the barriers of critical materials—precious metal iridium catalyst and proton exchange membrane,the core devices—bipolar plate and porous transport layer.The reduction direction and development potential of PEM water electrolysis hydrogen production technology are discussed,and its application prospect is also prospected.

As the third largest greenhouse gas followed by CO₂ and CH₄,N₂O has been increasing year by year due to its inevitable generation and emission in the processes of ammonia oxidation in nitric acid production,SCR purification of NO_x,and ammonia combustion.Therefore,the purification and elimination of N₂O are particularly crucial.Direct catalytic decomposition has emerged as one of the most promising methods for reducing N₂O emissions due to its high efficiency and no secondary pollution.This article first provides a detailed review of the research progress of N₂O decomposition catalysts in recent years,reviewing the practical application and future development trends of N₂O high-temperature decomposition catalysts (two-stage catalysts) in the nitric acid production,focusing on the research trends of three major types of N₂O low-temperature decomposition catalysts,such as precious metal catalysts,Co-based oxide catalysts,and Co or Fe-based molecular sieve catalysts,and summarizing the advantages and disadvantages of these catalysts.In addition,a simple discussion is provided on the decomposition mechanism of N₂O on typical Co and Fe-based catalysts.Selective catalytic reduction as one of the main technological routes for elimination of N₂O is also compared using different reducing agents such as CO,H₂,alkanes,etc.Finally,it identifies existing issues in current catalytic systems and outlines future prospects for N₂O catalytic decomposition.

This study discusses the problems and countermeasures of catalysts including geometric appearance,chemical properties and process performance in a thermal power plant running for 24 000 h to give suggestion on catalyst life management.The results show that the microstructure of the gas-turbine SCR catalysts is changed,and pore channels were blocked,which cause a decrease in specific surface area and pore volume.The content of main chemical components is decreased,while impurities and alkali metals causing catalyst slightly poisoning are increased.The process performance test results showed that the denitrification efficiency decreased and ammonia escape increased,while press drop was stable.Catalyst performnace still meets the requirements of running.It is recommended to monitor the performance of the catalyst closely,and if necessary,replacing or regenerating the catalyst to ensure the operation of the unit safely and steadily is important.

Pyrite (FeS₂) is an inexpensive and widely available natural iron sulfide mineral that shows great potential for organic pollutant degradation.However,its easily oxidizable nature leads to the formation of oxidized pyrite whose catalytic activity is to be explored deeply.In this study,we explored the perf-ormance of pyrite in the catalytic degradation of Rhodamine B (RhB) in water in a heterogeneous Fenton system.The effects of catalyst dosage,H₂O₂ concentration,pH value,anion and humic acid on the degradation of RhB were investigated.The results showed that the degradation of RhB solution was 96.5% in 20 min under the conditions of catalyst dosage of 0.5 g·L^-1,H₂O₂ concentration of 4.0 mmol·L^-1 and reaction temperature of 25 ℃.It was adaptable in a wide pH value of 3~9 and effectively resisted the effects of inorganic anions and humic acids in the water column.

The coal char and methane-carbon dioxide co-conversion reaction characteristics were investigated in a thermogravimetric reactor.The effects of reaction temperature the flow rate ratio of methane to carbon dioxide on the methane, carbon dioxide conversion, hydrogen and carbon monoxide yields were examined.The results show that during the co-conversion process,the methane conversion increases with the rise of reaction temperature,while the coal char carbon conversion increases firstly and then decreases with the rise of temperature.The methane and coal char carbon conversion decrease with the increase of methane concentration.Methane and hydrogen play different roles in carbon gasification.Methane has a hindering effect,while carbon dioxide has a promoting effect.Within the range studied,the conversion reaction conditions can be used to adjust the H₂/CO ratio in the product gas and better meet the requirements of subsequent process.