Industrial Catalysis

Select

Recent advances in ruthenium-based low-temperature and -pressure ammonia synthesis catalyst

HE Lin

Abstract （877）

PDF（pc）（454KB）（1415）

Save

The status of the research on ruthenium
-based ammonia synthesis catalyst and KAAP process developed by Kellogg and British Petroleum are described.The countermeasures and efforts to be made are proposed with respect to current situation in China.

Related Articles | Metrics | Comments（0）

Select

Molecular design of nanometer-size poly-oxometalates

PENG Ge，ZHANG Da-wei,HU Chang-wen

Abstract （874）

PDF（pc）（304KB）（1070）

Save

Feasibility of preparing nanometer-str
ucture poly-oxometalates is reviewed and their special property investigated.Fo
rmation process and preparation of nanometer-size poly-oxometalates and select
ion of their carrier material are discussed and prospect for further research an
d development forecast.

Related Articles | Metrics | Comments（0）

Select

Statistical analysis of papers and quotations in Industrial Catalysis

WANG Ya-jun;Feng Chang-gen;WANG Li-qun;AN Qin;YOU Shao-xiong

Abstract （875）

PDF（pc）（251KB）（994）

Save

According to the principle of bibliomet
rics,the publishing capacity,authors and quotations in Industrial Catalysis,
a journal published by the Northwest Research Institute of Chemical Industry(Lin
tong,Xi′an 710600,China),from 1993 to 1998，are statistically analysed.The purpose is to objectively evaluate the journal as well as its influence in scientific
research and provide reference data to the journal and industrial catalysis field.

Related Articles | Metrics | Comments（0）

Select

Processes for arsenic removal from hydrocarbon cracking feedstock and deactivation of the catalyst

HE Xiao-long

Abstract （842）

PDF（pc）（166KB）（1431）

Save

The methods adopted in arsenic removal
from liquid hydrocarbons and their features are reviewed.Various experiments such as physicochemical experiment are used to investigate the causes of a failure of arsenic catalyst process in Maoming Ethylene Plant.It is concluded that the failure is likely to be caused by improper strength of catalyst and contaminants carried over from preceding processes.

Related Articles | Metrics | Comments（0）

Select

Development of an atmospheric residue hydrodesulfurization(HDS)catalyst

WANG Gang;FANG Wei-ping;HAN Chong-ren

Abstract （878）

PDF（pc）（303KB）（1441）

Save

The effect of preparation methods on su
pport and of promotor and pore structure on the performance of catalyst were studied in laboratory experiments.Results show that the support prepared by the method described in this paper is featured by large pore volume,high surface area and narrow pore size distribution
(majority of the total pore volume is concentrated in diameter ranging from 5nm
to 10nm);incorporated promotor greatly improves activity of the catalyst.
2000 hours of stabilizing test of laboratorily prepared catalyst(FCZ-301)on 200
ml hydrotreating pilot plant showed that activity and stability of FCZ-301 was
superior to some existing commercial catalysts when hydrotreating high-sulfur
and -metal Middle East atmospheric residue.

Related Articles | Metrics | Comments（0）

Select

Nickel-passivating effect of non-toxic P-containing salts and the mechanism

YE Tian-xu；GAO Yong-can；PAN Hui-fang

Abstract （882）

PDF（pc）（261KB）（1183）

Save

The nickel-passivating mechanism of no
n-toxic P-containing salts(PNP)is investigated using NAT,TPR and XRD combined
with quantum chemistry calculation.Results show that new compound NiP₄Ｏ_１１ forms after adding PNP to nickel-deposited zeolite under the condition of
FCC regeneration.Because LUMO energy of NiP₄Ｏ_１１ is much higher than that o
f NiO,NiP₄Ｏ_１１ is more difficult to reduce than NiO under the condition of
FCC reaction.As the result,dehydrogenation activity of Ni^０ is inhibited.This
is the nickel-passivating mechanism of PNP.

Related Articles | Metrics | Comments（0）

Select

Influence of pore structure of carrier on property of ambient temperature COS hydrolysis catalyst

ZHOU Guang-lin；FU Yuan-sheng；ZHOU Hong-jun

Abstract （801）

PDF（pc）（240KB）（1147）

Save

Influence of surface area and pore stru
cture of γ-Al₂O₃ carrier on reaction property of ambient-temperature COS
hydrolysis catalyst was studied using fixed-bed flow-type reactor and pore sizer.Results show that carrier should have appropriate surface area and pore structure so as to facilitate adsorption of reactant molecules on catalyst surface and their contact with active sites,as well as desorption and leaving of product molecules from catalyst surface.

Related Articles | Metrics | Comments（0）

Select

Bench-scale single-tube test of a gas-phase phenol alkylation catalyst

LIU Zhi-ling；WANG Xiao-guang；XIONG Qian-zheng；LIAO Wen-wen；YANG Wen；WANG Zhen-yu

Abstract （851）

PDF（pc）（323KB）（975）

Save

Bench-scale single-tube test of V₂Ｏ_５-Fe₂Ｏ₃ catalyst for gas-phase alkylation of phenol and methanol to o-cresol and 2,6-dimethyl phenol is described.A reactor tube of 32mm inner diameter is used with packed catalyst amount of 2 kg and packing height of 2500mm.Under condition of catalyst load
＝90g-Ph/kg-cat·h and PhOH∶MeOH∶H₂O＝１∶4∶3(mol),the catalyst has conti
nuously operated for 2400h with four times of regeneration.Single-pass phenol
conversion of 62.21%，selectivity to o-cresol of 80.47% and single-pass 
o-cresol yield of 50.06%(mole) were obtained.

Related Articles | Metrics | Comments（0）

Select

Combined application of CB-11/CB-8 reforming catalysts

QI Tie-zhong

Abstract （864）

PDF（pc）（321KB）（1086）

Save

CB-11，developed by Fushun Research In
stitute of Petroleum and Petrochemicals(FRIPP),is a medium-platinum reforming
catalyst with low Re/Pt ratio and higher dehydrogenation activity;while CB-8 re
forming catalyst(also developed by FRIPP)has higher Re/Pt ratio and better selec
tivity.CB-11/CB-8 two-stage
process is a good substitute for CB-5B/CB-8 combined process.Application of CB
-11/CB-8 two-stage process in industrial plant has been successful with octan
e number and liquid product yield up to the requirement of design.The combined process has exhibited good activity,selectiyity and regenerability in practice.

Related Articles | Metrics | Comments（0）

Select

Selection and change-over of the catalysts used in a hydrogen plant

DAI Kun-quan；XIA De-lin；WU Hong；CHEN Lei

Abstract （846）

PDF（pc）（266KB）（1203）

Save

Selection and change-over of eight types of catalysts used in a hydrogen
plant in Zhenhai Refinery are described,including the reason for the change-ove
r.Four criteria for catalyst change-over are proposed.

Related Articles | Metrics | Comments（0）

Select

Ambient temperature liquid-phase propylene desulfurization technology for small PP plant

PENG Zhen-yu；WANG Jiu-wen

Abstract （851）

PDF（pc）（280KB）（1163）

Save

Influence of sulfur on high-efficiency
propylene polymerization cataly
st is discussed and application of domestic desulfurization agent in ambient tem
perature desulfurization from liquid-phase propylene described.Commercial opera
tion showed that the agent can reduce the sulfur content in treated propylene to
around 10μg/g when sulfur content of raw propylene is no more than 10μg/g
，which greatly improved quality of PP product and economic profit.

Related Articles | Metrics | Comments（0）

Select

Cause of the influence of K₂O on carbon dioxide hydrogenation over Cu/ZnO catalyst

LIU Zhi-jian；LIAO Jian-jun；TAN Jing-pin；LI Dadong

Abstract （872）

PDF（pc）（253KB）（1047）

Save

The cause of the influence of K₂O on carbon dioxide hydrogenation ove
r Cu/ZnO catalyst was investigated through activity determination,XRD,TPR,CO2
-TPD and CO-TPD.Experimental results show that addition of K₂O into CuO/ZnO catalyst increases difficulty in reduction of CuO/ZnO catalyst,enhances electron
density of copper and promotes CO disproportionation and decreases adsorption amount of CO₂ on copper.As the result,methanol yield is greatly decreased.

Related Articles | Metrics | Comments（0）

Select

Advances in technique for automotive catalyst and related research(Ⅰ)

WANG Yajun,PENG Xi,FENG Changgen

Abstract （878）

PDF（pc）（450KB）（2098）

Save

Catalyst technique is one of the major way to purify automotive exhaust
.Catalysts for control of automotive exhaust pollution are being widely used and
improved progressively.Research on automotive catalyst in recent thirty years i
s reviewed,including related regulations and standards,various types of catalyst
,theoretical and experimental studies,and characterization and evaluation.

Related Articles | Metrics | Comments（0）

Select

Research on catalyst for preparation of hydrogen peroxide through alkylanthroquinone route

WANG Shengnian,WANG Shudong,WU Diyong

Abstract （965）

PDF（pc）（284KB）（1671）

Save

Researches on catalyst for preparation of hydrogen peroxide through alk
ylanthroquinone route are reviewed.There are two sorts of catalysts for this pro
cess:nickel-and palladium-based.At first ,researches were focused on reaction
mechanism of active components,additives and screening out of proper support.After new processes were developed,researches on structure of support and dispersion of active componenets on the support became more and more active,and many breakthrough were made in this field.

Related Articles | Metrics | Comments（0）

Select

Preparation and regeneration of inorganic solid superacid

CUI Bo；JIN Qing

Abstract （905）

PDF（pc）（342KB）（1833）

Save

Status of researches on inorganic solid superacids is reviewed. Preparation and regeneration techniques for solid superacids when they are used as catalysts are also outlined.

Related Articles | Metrics | Comments（0）

Select

Reactivity of ultrafine CuO-ZnO-Al_２Ｏ_３ catalyst for carbon dioxide hydrogenation

NING Wensheng, ZHU Haixin, HU Zai-zhu，LIU Huazhang

Abstract （909）

PDF（pc）（465KB）（1200）

Save

A series of ultrafine CuO-ZnO-Al_２Ｏ_３ carbon dioxide hydrogenation were prepared by oxalate gel co-precipitation. The catalysts have homogeneous surface with copper, zinc and aluminium mixed homogeneously. Copper／zinc ratio has significant influence on activity for carbon dioxie hydrogenation to methanol. Highest selectivity to and yield of methanol were obtained when Cu／Zn ratio was 1. Copper particle size has important influence on methanol yield.

Related Articles | Metrics | Comments（0）

Select

Adsorption and decomposition of nitric oxide on surface of Ag-Pt bimetal

LI Jinbing^１，２；HUANG Weixin^２；BAO Xinhe^２

Abstract （920）

PDF（pc）（331KB）（1140）

Save

Adsorption and decomposition of nitric oxide on Pt(110) surface and Ag-Pt bimetal surface was investigated using temperature desorption spectroscopy (TDS) in ultrahigh vacuum (UHV). Decomposition of nitric oxide on platinum centres on Pt-Ag surface at elevated temperature creates strongly-adsorbed species: Pt-O_ad. Strongly-adsorbed oxygen species can spillover from Pt atom to Ag atom under experimental condition and desorb from catalyst surface at 630K.A model for spillover of O_ad from Pt atom to Ag atom is proposed.

Related Articles | Metrics | Comments（0）

Select

Development of a new nickel-passivator for FCC process

WU Quan,PAN Huifang

Abstract （884）

PDF（pc）（343KB）（1279）

Save

A new non-toxic high-efficiency nickel-passivator was developed.In laboratory and riser experiment,a moderate amount of passivating agent containing element A₁ and A₂was used to offset the detrimental effect on nickel.Passivating mechanism of element A₁ is based on valence control of heavy metal nickel,i.e.,A₁ reacts with metal nickel to form a stable crystalline compound A₁ NiO₃，which is difficult to be reduced in FCCU condition.As promotor,A₂, in the form of A₂O₂with weak alkalinity,adsorbs H₂under FCCU condition,resulting in decrease in hydrogen and coke in cracking process.Optimum ratio of A_land A₂to heavy metal was found to be 0.25∶0.1∶1.0.

Related Articles | Metrics | Comments（0）

Select

Investigation on performance of domestic octane enhancement FCC catalyst DOCP-L

DONG Lijun

Abstract （904）

PDF（pc）（357KB）（1010）

Save

In order to produce high octane number FCC gasoline,domestic octane enhancement cracking catalyst DOCP-L and reference catalyst were evaluated.Effect of reaction temperature,catalyst content and feedstock on performance of DOCP-L was discussed.Results show that DOCP-L has superior capacity for heavy oil conversion and octane number enhancement.DOCP-L is suitable to processing of paraffine-based FCC feedstocks.Catalyst content has great influence on product distribution and quality.

Related Articles | Metrics | Comments（0）

Select

Development and application of T-49 solid phosphoric acid catalyst for propylene oligomerization and benzene alkylation

LIAO Guoqin^１；YAO Yaping²；YUAN Meiqing²；XU Jing²

Abstract （1029）

PDF（pc）（362KB）（1084）

Save

This article describes development and application of T-49 solid phosoric acid catalyst for propylene oligomerization and benzene-propylene alkylation,including catalyst preparation,technical features,requirement on oligomerization feedstock and performance of the catalyst and technology.The catalyst is composed of silicon polyphosphates and boron polyphosphate that have continuous distribution of hydrolysis velocity.Key factors that influence on performance of the catalyst are polyphosphoric acid,elemental ratio and calcing condition.Appropriate P₂O₅/H₂O ratio in the catalyst could be obtained through adjustment of polymerization degree distribution of polyphosphoric acid and polyphosphates during preparation.During running of industrial reactor,adjustment and control of catalyst activity and hydrolysis velocity can be achieved through adjustment of water content in feedstocks according to acidity of reaction products and by the values given by a specially developed isopleth figure for acidity of reaction products,so that the catalyst exhibits appropriate activity and rather low rise speed of pressure drop through the bed.T49 catalyst has been successfully put into use in an industrial benzenepropylene oligomerization plant at Lanzhou Petroleum Processing & Chemical Complex with satisfactory result.

Related Articles | Metrics | Comments（0）

Select

^{Design and industrial application of DOCP(jl)catalyst for PHV upgrading}

ZHANG Zhengyi¹；GAN Jun¹；LIU Ximin^２；DU Jingrui^２；LIU Xide^２

Abstract （931）

PDF（pc）（395KB）（1220）

Save

The formulation designing concept of DOCP(jl)PHV upgrading catalyst,a catalyst specially designed for Jilin Oil Field Refinery,is described.Industrial operation of the catalyst is reviewed.The catalyst is featured by good product selectivity,high heavy oil cracking ability,strong resistance to metal contamination and good thermal and hydraulic-thermal stability.It can meet the requirement of direct production of 90^＃ gasoline.

Related Articles | Metrics | Comments（0）

Select

Development and application of JT-1G and JT-4 catalyst for dry refinery gas hydrogenation

DU Caixia,ZHOU Xiaoqi,HUO Shangyi

Abstract （893）

PDF（pc）（349KB）（1260）

Save

Development of the catalysts for hydrogenation of dry coker gas from refinery as well as their application on hydrogen plant in refinery and revamp of different size ammonia plants are described.Detailed description is given on operation of the catalysts in hydrogenation of rich refinery gas after absorption by gasoline and diesel,adiabatic bed recirculation hydrogenation,and isothermal-adiabatic hydrogenation of dry refinery gas.

Related Articles | Metrics | Comments（0）

Select

The acidity and catalytic properties of solid superacid SO^2－₄-MoO₃-ZrO₂ for esterification

HUANG Bichun

Abstract （845）

PDF（pc）（219KB）（1397）

Save

Activity test showed that activity of solid superacid SO^2－₄-MoO₃-ZrO₂ for esterification of n-butanol and acetic acid is higher than that of SO^2－₄-ZrO₂and MoO₃-ZrO₂ The acidity and its distribution in the catalyst was analyzed and characterized by TPD.Results showed that the acidity and its distribution was adjusted by MoO₃，which made it more favourable to esterification of n-butanol and acetic acid.

Related Articles | Metrics | Comments（0）

Select

Advances in cyclohexanol dehydrogenation catalysis

HU Yun-guang

Abstract （828）

PDF（pc）（162KB）（2465）

Save

Recent developments in cyclohexanol dehydrogenation catalysts were reviewed,with emphasis on recent progress of R ＆ D in this field.

Related Articles | Metrics | Comments（0）

Select

Abstract （745）

PDF（pc）（277KB）（1686）

Save

Related Articles | Metrics | Comments（0）

Select

Mechanism of support in ruthesium catalysts for ammonia synthesis

LI Ying;LIU Hua-zhang

Abstract （879）

PDF（pc）（142KB）（1732）

Save

Advances in ruthenium catalysts for ammonia synthesis are reviewed.The mechanism of supports and interactions between supports and ruthenium precursor compounds were described and compared in detail.

Related Articles | Metrics | Comments（0）

Select

Latest advances in the industrial application of Suzuki coupling reaction catalyzed by palladium

CHEN Xin-bing

Abstract （900）

PDF（pc）（115KB）（2365）

Save

This paper reviews the latest advances in Suzuki coupling reaction catalyzed by palladium

Related Articles | Metrics | Comments（0）

Select

Studies on silicon-rich USY zeolite modified by phosphorus

GAN Jun1;DING Yong1;YU Xiang-zhen1;LUO Yi-bin2

Abstract （868）

PDF（pc）（108KB）（1319）

Save

Ultrastable Y zeolite with rich silicon was modified with phosphorus.The shrink of UCS is easier under the hydrothermal processing conditions,and the hydrothermal stability is improved compared with the conventional silicon-rich USY.The acidity of the zeolite is changed from strong acid centers to medium-strong acid ones.The commercial running results with the zeolite the an active component showed that the catalyst has good coke selectivity with higher yield on middle distillate products.

Related Articles | Metrics | Comments（0）

Select

Ｄｅｖｅｌｏｐｍｅｎｔ　ａｎｄ　ｐｅｒｆｏｒｍａｎｃｅ　ｏｆ　ａ　Ｃｕ-Ｚｎ　ｃｙｃｌｏｈｅｘａｎｏｌ

ＬＥＮＧ　Ｑｉｎｇ-ｈａｉ，ＣＨＥＮ　Ｂｅｉ-ｘｉ

Abstract （854）

PDF（pc）（170KB）（1195）

Save

Ｌａｂｏｒａｔｏｒｙ　ｓｔｕｄｙ　ａｎｄ　ｔｗｅｎｔｙ-ｓｉｘ　ｍｏｎｔｈｓ　ｏｆ　ｏｐｅｒａｔｉｏｎ　ｉｎ　ｃｏｍｍｅｒｃｉａｌ　ｐｌａｎｔ　ｓｈｏｗｅｄ　ｔｈａｔ　ａ　ｃｏｐｐｅｒ-ｚｉｎｃ　ｃｙｃｌｏｈｘａｎｏｌ　ｄｅｈｙｄｒｏｇｅｎａｔｉｏｎ　ｃａｔａｌｙｓｔ，　ｄｅｖｅｌｏｐｅｄ　ｂｙ　ｔｈｅ　Ｃａｔａｌｙｓｔ　Ｗｏｒｋｓ　ｏｆ　Ｌｉａｏｈｅ　Ｃｈｅｍｉｃａｌ　Ｃｏｒｐｏrａｔｉｏｎ，　ｅｘｈｉｂｉｔｓ　ｈｉｇｈｅｒ　ａｃｔｉｖｉｔｙ．　Ｕｎｄｅｒ　ｔｈｅ　ｓａｍｅ　ｃｏｎｄｉｔｉｏｎ，ｃｏｎｖｅｒｓｉｏｎ　ａｎｄ　ｓｅｌｅｃｔｉｖｉｔｙ　ｏｆ　ｔｈｅ　ｃａｔａｌｙｓｔ　ｒｅａｃｈｅｓ　ｏｒ　ｓｕｒｐａｓｓｅｓ　ｔｈｏｓｅ　ｏｆ　ｔｈe　ｃａｔａｌｙｓｔ　ｉｍｐｏｒｔｅｄ　ｆｒｏｍ　ａｂｒｏａｄ．

Related Articles | Metrics | Comments（0）

Select

Influence of potassium on the activity of sulfur-tolerant CO shift catalyst

ZONG Qiu-yun；LI Xin；ZHANG Xin-tang；GUO Jian-xue；CHEN Yi-ping

Abstract （832）

PDF（pc）（169KB）（1183）

Save

The influence of potassium on the activity of Co-Mo sulfur-tolerant CO shift catalyst was investigated using GC-microreactor and XRD.The results show that there is an optimum range for potassium content when H2S concentration in reactant feed gas is maintained at high level.When H2S content is low，the shift activity increases with potassium amount;i.e.,addition of potassium into the catalyst can improve sulfur-tolerant capability at low H2S content.

Related Articles | Metrics | Comments（0）

Select

Study on control of active components in preparation of Co-Mo based
sulfur-tolerant shift catalyst with impregnation method

TANG Yong-liang

Abstract （884）

PDF（pc）（175KB）（1255）

Save

Relationship between concentration of active components in impregnating liquor and that in final catalyst product in preparation of Co-Mo based wide temperature range shift catalyst was investigated.Expressions of the relationship were obtained.

Related Articles | Metrics | Comments（0）

Select

Developments in paraffin hydrotreating catalysts in China

WANG Jia-huan;ZHANG Zhong-qing;FU Ze-min;FANG Wei-ping

Abstract （861）

PDF（pc）（172KB）（1562）

Save

Developments in paraffin hydrotreating catalysts in China in recent twenty years were reviewed.In this period ,various advanced paraffin-hydrotreating technologies and catalysts have been put into use for processing of Daqing and many imported crude oils.The paraffin output of China has taken the first place of the world since 1998.Its paraffin export amounted 70％ of that of the world in 1998.

Related Articles | Metrics | Comments（0）

Select

Operation of reforming catalysts in hydrogen plant and coking

ZHAO Xiao-long

Abstract （812）

PDF（pc）（167KB）（1424）

Save

Operation of reforming catalysts in the Refinery of Tianjin Petrochemical Co.is reviewed.The cause for coking of reforming catalysts during start-up is discussed and contermeasures proposed to prevent coking of the catalysts.

Related Articles | Metrics | Comments（0）

Select

Ｍｅａｓｕｒｅｓ　ｆｏｒ　ｓｏｌｕｔｉｏｎ　ｔｏ　ｂｌｏｃｋｉｎｇ-ｕｐ　
ｐｒｏｂｌｅｍ　ｉｎ　ｃｈｌｏｒｉｎｅ-ｆｅｅｄｉｎｇ　ｐｉｐｅｌｉｎe　ｉｎ　ＦＣＣＵ

ＬＩＵ　Ｙｏｎｇ

Abstract （757）

PDF（pc）（105KB）（1322）

Save

Ｃａｕｓｅｓ　ｆｏｒ　ｂｌoｃｋｉｎｇ-ｕｐ　ｏｆ　ｃｈｌｏｒｉｎｅ-ｆｅｅｄｉｎｇ　ｐｉｐｅｌｌｉｎｅ　ｉｎ　ｆｌｕｉｄ　ｃａｔａｌｙｔｉｃ　ｃｒａｃｋｉｎｇ　ｕｎｉｔ（ＦＣＣU）ｉｓ　ａｎａｌｙｚｅｄ　ａｎｄ　ｍｅａｓｕｒｅｓ　ａｎｄ　ｐｒｅｃａｕｔｉｏｎｓ　ｔｏ　ｂｅ　ｔａｋｅｎ　ｐｒｏｐｏｓｅｄ．

Related Articles | Metrics | Comments（0）

Select

Ｓｔｕｄｙ　ｏｎ　ｐｒｅｐａｒａｔｉｏｎ　ａｎｄ　ｓｕｒｆａｃｅ　ｂｅｈａｖｉｏｕｒ　ｏｆ　ｎｉｃｋｅｌ-ｓｅｐｉｏｌｉｔｅ　ｃａｔａｌｙｓｔ

ＬＵＯ　Ｌａｉ-ｔａｏ;ＨＵＡＮＧ　Ｈｏｎｇ-ｇａｎｇ２;　ＤＥＮＧ　Ｇｅｎｇ-ｆｅｎｇ３;ＷＵ　Ｚhｉ１;ＬＩ　Ｆｅｎｇ-ｙｉ１

Abstract （888）

PDF（pc）（178KB）（1160）

Save

Ｔｈｅ　ｅｆｆｅｃｔｓ　ｏｆ　ｐｒｅｐａｒａｔｉｏｎ　ｍｅｔｈｏｄ　ｏｎ　ｔｈｅ　ａｃｔｉｖｉｔｙ　ｏｆ　ｎｉｃｋｅｌ-ｓｅｐｉｏｌｉｔｅ　ｃａｔａｌｙｓｔ　ｆｏｒ　ｂｅｎｚｅｎｅ　ｈｙｄｒｏｇｅｎａｔｉｏｎ　ｗｅｒｅ　ｉｎｖｅｓｔｉｇａｔｅｄ.Ｔｈｅ　ｓｕｒｆａｃｅ　ｂｅｈａｖｉｏｕｒｓ　ｏｆ　Ｎｉ- ａｎｄ　Ｓｍ-ｓｅｐｉｏｌｉｔｅ　ｃａｔａｌｙｓｔｓｗｅｒｅ　ｃｈａｒａｃｔｅｒｉzｅｄ　ｂｙ　ＸＰＳ，Ｈ２-ＴＰＤ，ＸＲＤ，ＴＥＭａｎｄ　ＣＯ　ｃｈｅｍｉｓｏｒｐｔｉｏｎ．　Ｔｈｅ　ｒｅｓｕｌｔｓ　ｓｈｏｗ　ｔｈａｔ　ｔｈe　ａｃｔｉｖｉｔｙ　ｉｓ　ｉｎｆｌｕｅｎｃｅｄ　ｂｙ　ｉｍｐｒｅｇｎａｔｉｏｎ　ｏｒｄｅｒ　ａｎｄ　ｃａｌｃｉｎｉｎｇ　ｔｅｍｐｅｒａｔｕｒｅ，ａｎｄ　ｔｈａｔ　Ｎi-Ｓｍ-ｓｅｐｉｏｌｉｔｅ　ｃａｌｃｉｎｅｄ　ａｔ　５７３Ｋ　ｆｏｒ　５　ｈｏｕｒｓ　ｅｘｈｉｂｉｔｓ　ｔｈｅ　ｈｉｇｈｅｓｔ　ａｃｔｉｖｉｔｙ.Ｓｅｐｉｏｌｉｔｅ　ａｎｄ　Ｓｍ　ｃａｎ　ｉｎｃｒｅａｓｅ　ｂｏｔｈ　ａｃｔｉｖｅ　ｓｕｒｆａｃｅ　ａｒｅａ　ｏｆ　ｎｉｃｋｅｌ　ｃａｔａｌｙｓｔ　ａｎｄ　ｅｌｅｃｔｒｏｎｉｃ　ｄｅｎｓｉｔｙ　ｏｆ　ｎｉｃｋｅｌ　ａｔｏｍｓ．

Related Articles | Metrics | Comments（0）

Select

Analysis of the phenomena in automotive catalytic converters

FENG Chang-gen;WANG Ya-jun;WANG Li-qiong;YOU Shao-xiong;AN Qin

Abstract （860）

PDF（pc）（397KB）（1206）

Save

Catalytic converters have been widely used in autom
obile emission control.It is of great help to know the phenomena in catalytic converters for improving the design of catalysts and converters and adaptive modeling of converters.Phenomena in monolithic catalytic converters were analyzed in detail.Main physical and chemical processes include heat and mass transfer,flow distribution,chemical kinetics,oxygen storage-release and catalyst deactivation.

Related Articles | Metrics | Comments（0）

Select

Asymmetric catalysis and its application in fine chemical industry

WANG Sheng-guo;YU Guo-qing;WANG Shi-wen

Abstract （871）

PDF（pc）（197KB）（1803）

Save

The latest developments of asymmetric catalysis and
its application in fine chemical industry are reviewed in this paper.

Related Articles | Metrics | Comments（0）

Select

Studies on dehydrogenation of ethylbenzene with carbon dioxide

MIAO Chang-xi

Abstract （805）

PDF（pc）（120KB）（1295）

Save

New processes and catalysts for dehydrogenation of
ethylbenzene to styrene using carbon dioxide are reviewed.Energy consumption of new processes was estimated to be much lower than that of existing processes.A Fe-Ca-Al oxide catalyst was found to have higher activity in the presence of carbon dioxide.

Related Articles | Metrics | Comments（0）

Select

Application and trends in hydrodesulfurization(HDS) and olefine hydrogenation catalysts

FENG Xu

Abstract （984）

PDF（pc）（307KB）（1857）

Save

Application status and trends in hydrodesulfuri
zation (HDS) and olefine hydrogenation catalysts are reviewed. Detailed descript
ion is given on rerently developed hydrogenation
catalyst for coker gas, and FCC gas with high olefine concentration.

Related Articles | Metrics | Comments（0）

Select

Development of a coking gas oil hydrotreating catalyst

CAO Guang-wei;ZHAO Yan;WEI Deng-ling;TONG Minghai;WANG Xu-quan

Abstract （881）

PDF（pc）（195KB）（1328）

Save

Development of a Ni-Mo catalyst for hydrotreatment
of poor coking gas oil was described in the article.LTOC(low-temperature oxygen adsorption),TPR,XRD and TEM measurement were used to characterize the catalyst.Initial activity and stability of the catalyst were also tested with satisfactory results.The catalyst has been put into use in Changling Oil Refinery with remarkable benefit.

Related Articles | Metrics | Comments（0）

Industrial Catalysis 2000 Vol.8