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乔明华, Bo Liu, Minghua Qiao, Jianqiang Wang and Kangnian Fan*
CHEM. COMMUN., 2002, 1236-1237,-0001,():
-1年11月30日
A nanosized amorphous Ni-Cr-B catalyst prepared by the chemical reduction method exhibited superior thermal stability and selectivity in hydrogen peroxide synthesis via the anthraquinone route.
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乔明华, Bo Liu, ¤ Minghua Qiao, ¤ Jing-Fa Deng, ¤ Kangnian Fan, ¤ Xiaoxin Zhang, y and Baoning Zongy
Journal of Catalysis 204, 512-515 (2001),-0001,():
-1年11月30日
A novel skeletal Ni catalyst, prepared by alkali leaching of a Ni-Al alloy obtained by the rapid quenching technique, exhibited higher selectivity in hydrogenation of 2-ethylanthraquinone to "active quinones" than that of the Raney Ni catalyst originating from a conventional alloy. It is suggested that the structural defects of the rapidly quenched alloy lead to a high population of the strongly bound hydrogen, which is essential for selective hydrogenation of the carbonyl group.
skeletal Ni, rapid quenching, 2-ethylanthraquinone, hydrogenation, hydrogen peroxide.,
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【期刊论文】Integration of Methanation into the Hydrogenation Process of Benzoic Acid
乔明华, Baoning Zong and Xiaoxin Zhang Minghua Qiao
January 2009 Vol.55 No.1 192-197,-0001,():
-1年11月30日
The traditional industrial process for hydrogenation of benzoic acid to cyclohexanecarboxylic acid (CCA) has drawbacks of low-activity and fast deactivation of the Pd/C catalyst due to the poisoning of CO arising from the decarboxylation of CCA. A novel rapidly quenched skeletal NiCrFe promoter (RQ NiCrFe) is developed for the methanation of CO to harmless CH4. Evaluations in bench-scale autoclave and in traditional industrial equipment verified that RQ NiCrFe was very effective in promoting the activity of the Pd/C catalyst in the hydrogenation of benzoic acid. In order to solve the catalyst recycle and separation problem introduced by RQ NiCrFe, the industrial process was modified by incorporating a hydraulic cyclone and a magnetic separator to the separation unit. The modified process showed merits of lower costs of catalyst and operation, higher productivity, and better product purity than the traditional process.
skeletal Ni,, rapid quenching,, benzoic acid,, hydrogenation,, separation
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乔明华, Liang-Feng Chen a, Ping-Jun Guo a, Ming-Hua Qiao a, ∗, Shi-Run Yan a, He-Xing Li b, Wei Shen a, Hua-Long Xua, Kang-Nian Fan a
Journal of Catalysis 257 (2008) 172-180,-0001,():
-1年11月30日
Cu/SiO2 catalysts prepared by the ammonia-evaporation (AE) method have been systematically characterized focusing on the effect of the AE temperature during catalyst preparation. It is found that the texture, composition, and structure of the calcined and reduced Cu/SiO2 catalysts were profoundly affected by the AE temperature. Based on characterizations and previous findings, the copper species on calcined Cu/SiO2 samples and reduced Cu/SiO2 catalysts were assigned. In gas-phase hydrogenation of dimethyl oxalate (DMO) to ethylene glycol (EG), the evolution of the catalytic activity with the Cu0 and Cu+ surface areas suggested that Cu+ also participated in the hydrogenation process. The cooperative effect between Cu0 and Cu+ is proposed to be responsible for the highest hydrogenation activity of the Cu/SiO2 catalyst prepared at the AE temperature of 363K, on which an EG yield of 98% was obtained under the optimized hydrogenation conditions.
Cu/, SiO2, Ammonia-evaporation, Copper phyllosilicate, Dimethyl oxalate, Ethylene glycol, Hydrogenation
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乔明华, Xueying Chen, † Zhiying Lou, † Minghua Qiao, *, † Kangnian Fan, † Shik Chi Tsang, ‡ and Heyong He*, †
Published on Web 01/10/2008,-0001,():
-1年11月30日
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