Ammonia （NH₃） is widely regarded as a highly promising ideal hydrogen carrier due to its high hydrogen density，ease of liquefaction and storage，and the clean advantage of producing no carbon dioxide during combustion.Most importantly，efficient and low-energy-consumption NH₃ decomposition technology for hydrogen production serves as a critical link in the “green ammonia-green hydrogen” energy cycle and is of great significance for building a renewable energy-centered hydrogen economy.This review systematically summarizes recent advances in gas-phase catalytic NH₃ decomposition driven by renewable energy sources such as wind and photovoltaic power.It focuses on analyzing the fundamental principles，reaction characteristics，and practical application potential of innovative technical pathways，including gas-phase photocatalysis，plasma-assisted catalysis，electrically driven catalysis，and magnetic induction heating catalysis.These approaches，leveraging mechanisms such as photothermal synergy，plasma activation，electric field modulation，and electromagnetic induction heating，have significantly lowered the reaction temperature of catalytic NH₃ decomposition and improved overall energy efficiency.However，the field still faces several key challenges，including insufficient long-term stability of catalysts，high reliance on noble metal active components，suboptimal overall system energy utilization efficiency，and engineering bottlenecks in scaling up from laboratory to industrial levels.Future development of NH₃ decomposition technology for hydrogen production requires breakthroughs in several areas：in-depth investigation of multi-field coupling mechanisms，development of novel low-cost and high-activity non-noble metal catalysts，optimization of reactor structure design，and interdisciplinary system integration.Through synergistic innovation across multiple technical pathways，NH₃ decomposition for hydrogen production is expected to accelerate its translation from laboratory research to large-scale industrial application，thereby providing solid technical support for the establishment of a safe，efficient，and sustainable hydrogen energy supply system.

The dry reforming of methane （DRM） reaction can simultaneously convert two major greenhouse gases，CH₄ and CO₂，into syngas （H₂/CO≈1）.It provides key feedstock for downstream chemical processes such as Fischer-Tropsch synthesis and methanol synthesis，and holds significant importance in energy structure transformation and carbon neutrality strategies.Ni-based catalysts have emerged as the most industrially promising catalytic system for the DRM reaction due to their low cost and excellent CH₄ dissociation activity.However，Ni-based catalysts are prone to issues such as coke deposition-induced deactivation and metal sintering at high temperatures，which severely limit their practical applications.This paper systematically reviews the recent research progress of Ni-based catalysts in structural design，performance regulation and deactivation mechanism optimization.It focuses on discussing performance enhancement strategies including support modification，active component regulation，promoter addition and novel structure construction，analyzes the mechanisms of each strategy in improving catalytic activity，coke resistance and sintering resistance，and prospects the future development directions and industrial application prospects of Ni-based catalysts.This review provides a reference for the design and development of high-efficiency and stable DRM catalysts.

Photocatalytic oxidation is a mainstream technology for the decolorization of industrial dye wastewater.It can effectively improve the efficiency，economic benefits and sustainability of wastewater treatment，and is of great significance to ecological environmental protection and human health protection.This paper reviews the application of rare earth-doped metal oxide nanoparticles as high-efficiency photocatalysts in the degradation of organic dyes under ultraviolet and visible light irradiation.Rare earth modification can broaden the visible light response range of catalysts，inhibit the recombination of photogenerated carriers and promote the generation of reactive oxygen species.Organic dyes can be degraded and mineralized via oxidation，which provides sustainable technical ideas for the efficient resource treatment of dye wastewater.This catalytic system reduces the dosage of chemical agents and reaction energy consumption，complying with the development requirements of green chemistry and cleaner production.This article further summarizes the influence rules of various conditions on the photocatalytic degradation of dyes.

ZSM-5 zeolite，as a porous inorganic functional catalytic material，exhibits excellent thermal stability，hydrothermal stability，and unique shape-selectivity，demonstrating significant application value in petroleum catalysis，fine chemical industry，and environmental protection.However，its inherent microporous structure severely restricts its application in catalytic reactions involving bulky molecules；the synthesis of hierarchical zeolites can effectively solve the problem of macromolecule transfer limitation，enhancing the accessibility of organic macromolecules to active centers，thereby improving the catalytic activity of zeolites and extending the service life of catalysts.Recent one-pot synthesis strategies of hierarchical ZSM-5 zeolite were reviewed，including hard template method，soft template method，template-free method and in situ crystallization of natural silica-alumina minerals.Suggestions for further study were also proposed.

The H₃PW₁₂O₄₀ and TiO₂ composite photocatalyst（PW/TiO₂） was prepared by the sol-gel method.The microstructure and physicochemical properties of the samples were characterized by X-ray diffraction（XRD），Fourier transform infrared spectroscopy（FT-IR），scanning electron microscopy（SEM），and X-ray photoelectron spectroscopy（XPS）.Rhodamine B was used as a simulated organic pollutant to investigate the visible light catalytic degradation performance of the composite material.The results showed that the PW/TiO₂ composite catalyst exhibited excellent visible light catalytic activity，and 100% degradation of Rhodamine B could be achieved under visible light irradiation for 120 minutes.Repetitive experiments indicated that the catalyst had good cyclic stability.After 9 cycles of use，its degradation efficiency of Rhodamine B was still 86.8%，and the degradation rate after 13 consecutive cycles was 53.3%.The results of free radical trapping experiments showed that holes （h⁺），superoxide free radicals （·${\mathrm{O}}_{2}^{-}$），and hydroxyl free radicals （·OH） all had certain effects on the degradation of Rhodamine B solution in the photocatalytic reaction system.Among them，the effect of hydroxyl free radicals （·OH） was significantly greater than that of the other two active substances.

By treating and modifying the activated carbon carrier，a low-loaded palladium carbon （3%Pd/C） catalyst was prepared by an impregnation-deposition method，which was used for the selective dechlorination of 2，3，6-trichloropyridine to produce 2，3-dichloropyridine.The influence of the catalyst preparation process and reaction process conditions on the catalytic activity，target product selectivity and raw material conversion of the selective dechlorination reaction was systematically investigated.The results showed that the conversion of 2，3，6-trichloropyridine was 96.99%，and the selectivity of 2，3-dichloropyridine was 67.34% over 3%Pd/C-（1-5） when the catalyst amount was 0.035 g，reaction temperature was 40 ℃，reaction time was 6 h，reactor speed was 600~700 r/min，H₂ pressure was 0.45 MPa.

To explore the synergistic effects of Al and Zn species in TS-1 molecular sieve catalysts，this study employed hydrothermal synthesis to prepare pure titanosilicate-1（TS-1）.An Al-doped TS-1（TSAl-1） catalyst was synthesized，followed by loading of Zn to obtain Zn/TS-1 and Zn/TSAl-1 catalysts，respectively.The samples were characterized using XRD，SEM，TEM，N₂ adsorption-desorption，and other techniques.Their performance in catalyzing propane aromatization at 600 ℃ was evaluated in a fixed-bed reactor.The findings indicate that both Al doping and Zn modification，individually，can enhance propane conversion to varying degrees.However，the molecular sieve modified with both Al and Zn （Zn/TSAl-1） shows a distinct increase in specific surface area，total pore volume and acidity，thereby exhibiting optimal catalytic performance，with a propane conversion as high as 91.7% and an aromatic selectivity of 69.4%.This research provides a new insight for the development of efficient low-carbon alkane aromatization processes.

The ZSM-5 zeolite （MFI） was modified by acid treatment using different concentrations of oxalic acid and citric acid.The structural properties，acidic characteristics，and external surface acidity of the ZSM-5 zeolite before and after acid treatment were systematically characterized by XRD，SEM，N₂ adsorption-desorption，¹H NMR，pyridine-IR and liquid amine titration.The influence of acid-treated zeolites on the performance of toluene disproportionation was investigated.The results show that after acid treatment，the crystallinity of the zeolite remains largely unchanged，and the framework structure is not significantly damaged.However，the amount of Brønsted acid sites decreases with increasing acid concentration，and part of the framework aluminum converts into non-framework aluminum.Meanwhile，the external surface acidity （especially for the oxalic acid-treated sample） decreases noticeably.Pore structure analysis indicates that acid treatment mainly affects the mesoporous structure，while the microporous properties remain essentially unchanged.The oxalic acid-treated sample shows a more significant increase in mesopore volume.In the toluene disproportionation reaction，the acid-treated catalysts exhibit higher xylene selectivity and lower byproduct formation.Among them，the oxalic acid-treated sample （CAT-xC） demonstrates effective regulation of external surface acidity and favorable catalytic performance.

For the ethylene-to-propylene （ETP） reaction，the catalytic performance of H-SSZ-39，SAPO-34，H-SSZ-13 and H-ZSM-5 was evaluated.Among them，H-SSZ-13 demonstrated the highest activity attributed to its optimal pore aperture，cage dimensions，and favorable adsorption properties.To further improve its performance，H-SSZ-13 was modified via dealumination，metal loading and non-metal loading.Among these modifications，the phosphorus-modified sample P-SSZ-13-0.4% showed the highest performance.Under the optimized conditions of atmospheric pressure，350 ℃，a gas hourly space velocity （GHSV） of 1 000 mL/（g·h），and an ethylene partial pressure of 25 kPa，it achieved an ethylene conversion of 92.3%，with a propylene selectivity of 82.8% and a corresponding yield of 76.4%.Furthermore，cycling stability tests confirmed its good reusability.

To enhance the catalytic performance and stability of copper-based catalysts in the hydrogenation of dimethyl 1，4-cyclohexanedicarboxylate （DMCD） to 1，4-cyclohexanedimethanol （CHDM），a series of Ce-modified Cu/SiO₂ catalysts were prepared via the synchronous ammonia evaporation method.The relationship between their structure and performance was investigated using characterization techniques such as N₂ physisorption-desorption，XRD，FT-IR，H₂-TPR，H₂-TPD，and NH₃-TPD.The results indicated that introduction of an appropriate amount of Ce optimized the textural properties and regulated the surface chemical properties of the catalysts.When the theoretical mass fraction of Ce was 3% （Cu-3Ce），the specific surface area，average pore diameter，and total pore volume of the catalyst were 470.9 m²/g，6.32 nm，and 0.92 cm³/g，respectively.Under the reaction conditions of 210 ℃，3.0 MPa，a molar ratio of H₂ to DMCD of 100，and a mass hourly space velocity of 0.58 g/（g·h） the conversion of DMCD reached 99.7%，and the selectivity to CHDM reached 94.3%.After continuous operation for 200 h，no significant degradation in catalyst performance was observed，demonstrating significantly superior stability compared to the unmodified Cu/SiO₂ catalyst.

With the increasing diversification and inferiorization of pyrolysis feedstocks，the impurity content in raw pyrolysis gasoline has risen significantly.These changes impose more stringent requirements on hydrogenation catalysts.Based on the technologies of high dispersion of nickel crystallites and carrier surface regulation，SINOPEC Shanghai Research Institute of Petrochemical Technology Co.，Ltd.successfully developed a high-performance nickel-based catalyst for first-stage hydrogenation of pyrolysis gasoline，tailored for inferior feedstocks.In 2020，the catalyst was industrially applied in a 400 kt/a pyrolysis gasoline hydrogenation unit.Operation data over the past four years demonstrated that the catalyst maintained stable performance under diversified and inferior pyrolysis feedstock conditions while operating at 110%~120% of design capacity.The diene value of the outlet product from the first reactor was below 2.0 gI₂/100 g，and the styrene content was less than mass fraction of 0.5%，both of which exhibited excellent performance.These results confirmed the high hydrogenation activity and stability of the catalyst in handling inferior pyrolysis feedstocks.

Fly ash （FA） and red mud （RM） are bulk solid wastes generated in industrial production， and their stockpiling in large quantities leads to resource waste and environmental pollution.To address the resource utilization of these two solid wastes，this study proposed a strategy for extracting and utilizing crystal-transforming elements from mixed solid wastes，and systematically investigated the effect of fly ash on the extraction of silicon from red mud，as well as the influence of different mass ratios of red mud to fly ash on the feasibility and performance of silica aerogel preparation.By optimizing the raw material mass ratio，silica-based aerogel with high specific surface area and uniform pore size as well as large pore volume was successfully prepared.XRD analysis indicated that the activated product （ARF） obtained by high-temperature calcination of the fly ash-red mud composite with sodium carbonate achieved complete crystal transformation，in which silica and alumina were converted into nepheline that reacts readily with hydrochloric acid.BET characterization revealed that the silica aerogel prepared via acid leaching，gelation，modification and atmospheric pressure drying from ARF with a mass ratio of RM to FA of 0.4 （RM/FA-0.4） exhibited the maximum specific surface area （1 129.4 m²/g） and uniform mesoporous pore size （5.6 nm）.Compared with the traditional synthesis of aerogels using high-purity silicon sources，this method recycles two industrial solid wastes （fly ash and red mud），and only requires adding a small amount of tetraethyl orthosilicate （TEOS） as a gelation accelerator during the gelation stage，which greatly shortens the gelation time without compromising the aerogel quality.This work provides a novel approach for the resource recovery of industrial wastes and environmental protection.

After ranking the risk values of wastewater exposure in industrial parks，the original content data has a high dimensionality，making it difficult to capture effective key category information，moreover，the concentrations of the some pollutants are close to the Limit of Detection（LOD）.A method for identifying pollutants in industrial park wastewater based on inductively coupled plasma mass spectrometry（ICP-MS） is proposed.Sewage sample data were obtained by stratified sampling method，and the heavy metal contents of sewage samples were determined by inductively coupled plasma mass spectrometry method.By combining the Linear Discriminant Analysis（LDA） method and constructing an inter class matrix，the risk feature dimension of sewage sample data is reduced while retaining key category information of heavy metal content data.By combining the Extreme Learning Machine（ELM） model，the pollutant type of wastewater content data can be determined in the lowest dimensional space，enabling the identification of inorganic pollutants，organic pollutants，petroleum pollutants，and heavy metal pollutants in wastewater discharged near industrial parks.The experimental results showed that the specific distribution of inorganic pollutant，organic pollutants，petroleum pollutants，and heavy metal pollutants was effectively measured，and the concentration distribution of pollutants was further analyzed.The mean LOD was within 0.1 mg/L，which meets the identification requirements of industrial park sewage pollutants.