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Chinese Journal of Catalysis
2009, Vol. 30, No. 1
Online: 25 January 2009

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Catalytic Decomposition of Ozone in Ground Air by Manganese-Based Monolith Catalysts YU Quanwei;ZHAO Ming;LIU Zhimin;ZHANG Xiaoyu;ZHENG Lingmin;CHEN Yaoqiang;GONG Maochu* 2009, 30 (1):  1-3.  Abstract ( 2381 )   [Full Text(HTML)] () PDF (172KB) ( 1242 )   A series of Pd-MnOx/SiO2-Al2O3 catalysts with different MnOx contents ha d excellent performance of decomposing O3 at high GHSV, low temperature，and l o w concentration. Especially on the catalysts with MnOx content of 80% -90%, T100, the complete conversion temperature, was i n the range of 45-50 ℃, which can meet the decomposition temperat ure of O3. These catalysts had high capacity to resist deactivation.

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Selective Catalytic Reduction of NOx with NH3 on a Cr-Mn Mixed Oxide at Low Temperature CHEN Zhihang;LI Xuehui*;GAO Xiang;JIANG Yanbin;L Yangxiao;WANG Furong;WANG Lefu 2009, 30 (1):  4-6.  Abstract ( 2414 )   [Full Text(HTML)] () PDF (229KB) ( 1029 )   A series of Cr-Mn mixed oxide catalysts were prepared by the citric acid met hod. This catalytic system has excellent activity with 98.5% NOx conversi o n and 100% selectivity for N2 on Cr(0.4)-MnOx at 120 ℃ and space velo city of 30000 h-1. The addition of chromium to MnOx can gene rate a CrMn1.5O4 crystal phase, which is the main active center.

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Synthesis of Propylene Carbonate from Carbon Dioxide and o-Chloropropanol ZHOU Xi;YANG Xiangui;CHEN Tong;ZHANG Yi;WANG Gongying* 2009, 30 (1):  7-8.  Abstract ( 2278 )   [Full Text(HTML)] () PDF (112KB) ( 914 )   Synthesis of propylene carbonate from CO2 and o-chloropropanol, which is the intermediate of producing propylene oxide, was studied. Triethylami ne and potassium carbonate exhibited high activity. The cataly tic system of K2CO3-N(Et)3 has higher yield of propylene carbonate than u se of them by single.

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Dehydration of 2-(4′-Ethylbenzoyl)-benzoic Acid to 2-Ethylanthra-quinone over Hβ Zeolite Modified with Organic Acids ZHAI Lingjuan;LIU Min;DONG Xiangmei;SONG Chunshan;GUO Xinwen* 2009, 30 (1):  9-13.  Abstract ( 2144 )   [Full Text(HTML)] () PDF (319KB) ( 836 )   Hβ zeolite was modified with seven organic acids. Their catalytic perform ance in dehydration of 2-(4′-ethylbenzoyl)-benzoic acid ( BEA ) to 2-ethylanthraquinone (2-EAQ) was studied. Hβ zeolites modified with cit ric acid (Hβ-c), tartaric acid (Hβ-t), malic acid (Hβ-m), and propanedioic acid (Hβ-p) showed high catalytic activity. The BEA conversion and 2-EAQ sel ectivity were both up to 95.0%. A suitable amount of acid sites with proper aci d strength is needed for the reaction. Excess or deficiency of concentration and strength of acid sites would result in dehydration between molecules or lower the catalyst activity.

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Toluene Degradation in Water Using AlFe-Pillared Clay Catalysts Predrag BANKOVIC*;Aleksandra MILUTINOVIC-NIKOLIC;Zorica MOJOVIC;Aleksandra ROSIC;ZeljkoUPIC;Davor LONAREVIC;Duan JOVANOVIC 2009, 30 (1):  14-18.  Abstract ( 2541 )   [Full Text(HTML)] () PDF (316KB) ( 825 )   Catalytic wet peroxide oxidation of toluene on two bentonite-based AlFe-pillar ed clays was investigated. The two catalysts have similar surface area and pore vo lume and differ only in Fe content. Leaching of Al and Fe from both catalysts wa s insignificant. Both catalysts showed good activity for toluene degradation, es pecially the one richer in Fe.

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DSC/TG-MS Study on in Situ Catalytic Thermal Decomposition of Ammonium Perchl YU Zongxue;CHEN Lifen;LU Lude*;YANG Xujie;WANG Xin 2009, 30 (1):  19-23.  Abstract ( 2759 )   [Full Text(HTML)] () PDF (316KB) ( 979 )   CoC2O4 shows intensive catalytic effect on the thermal decomposition of ammo nium perchlorate (AP). Adding 2% of CoC2O4 to AP decreases the decomposition tem pera ture by 104 ℃ and increases the heat of decomposition from 655 J/g to 1469 J/g. Products of thermal decomposition of AP are H2O , NH3 , O2, HCl , Cl2 , NO , N2O , and NO2. The results show that the new ecological nano-c obalt oxide presents better catalysis performance for thermal decomposition of A P.

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Theoretical Study of the Lewis Acidity of TS-1 Zeolite WANG Yilei;XING Shuangying;CAO Liang;WANG Shanpeng;ZHOU Danhong* 2009, 30 (1):  24-30.  Abstract ( 2198 )   [Full Text(HTML)] () PDF (440KB) ( 1037 )   The Lewis acidity of TS-1 zeolite was theoretically studied by calculating the adsorption energies of basic probe molecules on different Ti centers. The result s indicated that Ti located at the T12 site presents obvious Lewis acidity, whic h can strongly adsorb NH3 through providing the empty σ*(Ti- O) orbital to accept the lone pair electrons.

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Structure and Properties of MgAlCuFe Complex Oxide for FCCDesulfurization: Effect of Fe and Cu Contents CHENG Wenping;LIANG Xuezheng;YANG Jianguo*;HE Mingyuan 2009, 30 (1):  31-36.  Abstract ( 1849 )   [Full Text(HTML)] () PDF (391KB) ( 863 )   MgAlCuFe obtained from hydrotalcite-like compounds showed excellent s ulfur transfer ability for SOx removal from FCC flue gas. In the catalysts , Cu1%Fe8%-LDOs (n(Mg)/n(Al)=5) exhibited total saturation adsorption capacity of 1.57 g/g in 6 min and high adsorption-redu ction rates under the conditions similar to those of a typical FCC.

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Preparation of Titania Nanotube Arrays by the Hydrothermal Method LI Gang;LIU Zhongqing*;ZHANG Zhao*;YAN Xin 2009, 30 (1):  37-42.  Abstract ( 1929 )   [Full Text(HTML)] () PDF (540KB) ( 1007 )   Titania nanotube arrays synthesized through hydrothermal treatment assisted with an anodic aluminum oxide template exhibit an especial morphology, that is, a co ntinuous porous surface and discrete tubular cross-section structure. The forma tion of such an especial morphology is attributed to preferential deposition of the hydrolysis product on the surface of the template, which is caused by the di fferent reaction rate when ［TiF6］2- reacts with the surface and the c ross section of the template.

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Electrosynthesis of Dimethyl Carbonate in [bmim]BF4-MeCN Solvent XIAO Liping;ZHANG Guirong;ZHANG Li;NIU Dongfang;LU Jiaxing* 2009, 30 (1):  43-47.  Abstract ( 2610 )   [Full Text(HTML)] () PDF (279KB) ( 1157 )   The electrosynthesis of dimethyl carbonate (DMC) from CO2 and MeOH in the ［bm im］BF4-MeCN solvent with different V(［bmim］BF4)/V(MeCN) was realized in an undivided cell under mild conditions. The ionic liquid ［bmim］BF4 containe d in the mixed solvent possessed catalytic effect on the CO2 electrolysis. The cathodic peak for CO2 reduction shifted positively in the mixed solvent. Unde r the optimal conditions, the highest DMC yield reached 79.6%. A possible reacti on mechanism for electrosynthesis of DMC was proposed.

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Enhancement of Arctigenin Content by Processing of Fructus Arctii via Solid-State Fermentation Coupled with Poach OU Zhimin;GUO Fangyuan;YANG Gensheng*;YAO Shanjing 2009, 30 (1):  48-52.  Abstract ( 2404 )   [Full Text(HTML)] () PDF (273KB) ( 936 )   The arctigenin content in fructus arctii has been increased by solid-state ferm entation coupled with poach. The optimum medium components are 0.5 g fructus ar c tii powder, 3 g bran, 2 g bagasse, 0.3 g peptone, and 10 ml Mandels nutrient fl uid. Solid-to-liquid ratio is 1∶3.6 g/ml. Initial pH of the medium is 5.6. The yield reached 93.0% when 0.174 mmol/L arctiin was hydrolyzed at 30 ℃ for 7 d. In 7 d, the hydrolysis of arctiin is in accordance with the equation of Monod.

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Preparation of Nanosized Mesoporous CuTSPc/SnO2 and Its Photocatalytic Activity under Visible Light Irradiation GUO Longfa;PAN Haibo*;SHEN Shuifa;HUANG Jinling 2009, 30 (1):  53-59.  Abstract ( 2268 )   [Full Text(HTML)] () PDF (580KB) ( 1031 )   CuTSPc/SnO2 was prepared by a simple template-free hydrothermal method. The i nteraction between CuTSPc and SnO2 was strong by means of sulfonated group. Co mpared with pure SnO2, 0.1 mol%CuTSPc/SnO2 exhibited smaller average pore a nd higher BET surface area. The effects were explained that excellent dispersity and small crystallite size were achieved by the encapsulation of SnO2 with ph thalocyanine.

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Effects of Swelling Agents Amount, pH Value of the System, and the SiO2/Al2O3 Ratio of MCM-22(P) on the Synthesis of ITQ-2 Zeolite WANG Baoyu*;WU Jianmei;YUAN Zhongyong;Xiang Shouhe 2009, 30 (1):  60-64.  Abstract ( 2480 )   [Full Text(HTML)] () PDF (287KB) ( 877 )   The amount of swelling agents (CTMABr, TPAOH) and the pH value of the synthesis system were the most important factors for the intercalation swelling of CTMA+ into the sheets of MCM-22(P). The well-swollen MCM-22(P) could be o btained when MCM-22(P)∶CTMABr∶40%TPAOH∶H2O mass ratio was 1∶1∶1.1∶16. With the pH value decreasing, the desiliconization of MCM-22(P), which resulted in a decre a se of the SiO2/Al2O3 ratios of ITQ-2, greatly decreased, the yield of ITQ - 2 zeolite significantly increased, and the ultrasonic exfoliation process becam e more accessible.The MCM-41 mesophase could be avoided when the exfoliat ion process was performed at lower pH value.

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Organotitanium Compound Catalysts for Transesterification of Dimethyl Carbonate and Phenyl Acetate to Diphenyl Carbonate CAO Ping;;YANG Jian;YANG Xiangui;YAO Jie;WANG Yue;WANG Gongying;* 2009, 30 (1):  65-68.  Abstract ( 2369 )   [Full Text(HTML)] () PDF (177KB) ( 1309 )   An alternative method was studied for diphenyl carbonate (DPC) synthesis from di methyl car bonate (DMC) and phenyl acetate (PA) using a β-diketonate titanium complex, ti tan ium oxide acetylacetonate (TiO(acac)2), as the catalyst. TiO(acac)2 is an ef ficient catalyst for the transesterification reaction with a catalyst amount of 0.006 (mole ratio to PA).

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Green Epoxidation of α,β-Unsaturated Ketones ZHANG Aiping;GAO Shuang*;XU Jie;XI Zuwei;HU Xinquan 2009, 30 (1):  69-72.  Abstract ( 2385 )   [Full Text(HTML)] () PDF (187KB) ( 1003 )   In the presence of H2O2, the epoxidation of α, β-unsaturated ketones cata lyzed by quaternary ammonium heteropolyphosphato-tungstate was studied. The facto rs such as different solvents, reaction temperature, catalyst amount, reaction time, and substrate concentration were investigated. Epoxidation of α , β-unsaturated ketones can be easily performed in this catalytic system. Under the optimized reaction conditions an epoxy-4-meth yl-3-penten-2-one yield of 87% was obtained.

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Photocatalytic Hydrogen Production on CuInS2-ZnS Solid Solution Prepared by Solvothermal Method MA Guijun;LEI Zhibin;YAN Hongjian;ZONG Xu;LI Can* 2009, 30 (1):  73-77.  Abstract ( 3203 )   [Full Text(HTML)] () PDF (427KB) ( 1256 )   The CuInS2-ZnS solid solution was prepared by a solvothermal route using ethy lenediamine as the solvent. A trace amount of In3+ incorporated into ZnS c an ind uce the transformation of the ZnS phase from cubic to hexagonal and can sharply decrease the particle size of ZnS. The (CuIn)0.09-Zn1.82S2 cata ly st showed comparable photocatalytic activity and stability in photocatalytic hyd rogen production.

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Preparation of High-Surface-Area MoS2 and Its Catalytic Performance for Selective Hydrogenation of Quinoline MA Chongle;JIN Xin;DING Ling;ZHANG Qiumin;QIU Jieshan;LIANG Changhai* 2009, 30 (1):  78-82.  Abstract ( 2505 )   [Full Text(HTML)] () PDF (833KB) ( 1363 )   Molybdenum disulfide with the specific surface area of 108 m2/g and pore size distribution of 4-12 nm was prepared by decomposition of tetramethylammonium thiomolybdate, which was synthesized at room temperature in an aqueous solution of ammonium tetrathiomolybdate or tetramethylammonium chlo ride. The high-surface-area MoS2 possessed high catalytic activity and hig h selectivity for 1,2,3,4-tetrahydroquinoline in the selective hydrogenation of quinoline, being similar to those of noble metal catalysts.