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Ni-B/TiO_2 Amorphous Catalyst Used in Heavy Arenes of Petrochemicals Hydrogenation 认领 引用 被引量：4
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作者 Qing Yan CHENG Wei LI +3 位作者 Ying ZHOU Ming Hui ZHANG Nai Jia GUAN Ke Yi TAO 《Chinese Chemical Letters》 SCIE CAS 2001年第12期1123-1126,共4页
A supported Ni-B/TiO2 amorphous catalyst was prepared by impregnation and reduction. It was characterized by XRD, SAED, DSC, XPS, etc.. The catalytic activity of catalyst was measured through the hydrogenation of heav... A supported Ni-B/TiO2 amorphous catalyst was prepared by impregnation and reduction. It was characterized by XRD, SAED, DSC, XPS, etc.. The catalytic activity of catalyst was measured through the hydrogenation of heavy arenes in petrochemicals for the first time. 展开更多
关键词 Hydrogenation heavy arenas petrochemicals Ni-B/TiO2 amorphous catalyst.
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Hydrogenation of phenylpyruvic acid to phenylalanine catalyzed by Ni-B/SiO2 认领 引用
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作者 Qunfang Liang Aiqing Zhang Lin Li 《Journal of Natural Gas Chemistry》 2008年第3期303-308,共6页
Phenylalanine(Phe)is a significant amino acid that cannot be synthesized by human themselves but must be taken from environment.It was initially found that the nanosized amorphous Ni-B/SiO2 alloy prepared by the chemi... Phenylalanine(Phe)is a significant amino acid that cannot be synthesized by human themselves but must be taken from environment.It was initially found that the nanosized amorphous Ni-B/SiO2 alloy prepared by the chemical reduction method was an effective catalyst for the preparation of Phe from phenylpyruvic acid(PPA)by amination and hydrogenation.It has been found that the amorphous Ni-B/SiO2 alloy catalyst exhibits superior activity and selectivity to the traditional catalysts Raney Ni and Urushibara nickel.The effects of reaction time,amounts of catalysts and ammonia solution,reaction temperature,and H2 pressure on the reaction have been investigated systematically.The results indicated that the yield of Phe was 97.9%,and the selectivity for Phe reached 98.9%when the reaction was carried out for 3 h at 333 K and 2.0 MPa of H2 with m(Cat.):m(PPA)=0.6:1.0 and n(NH3):n(PPA)=3:1.The catalysts were characterized by XRD,AAS,XPS,BET,and TEM,and the relationship between the catalyst structure and the catalytic activity was discussed in detail.It was found that the reason why Ni-B/SiO2 amorphous alloy catalyst was much more active for the preparation of Phe could be accounted for by the presence of electron-rich Ni due to electron donation from alloying B;the smaller size of Ni-B particles,the larger specific surface area of Ni-B/SiO2. 展开更多
关键词 Ni-B/SiO2 amorphous alloy phenylalanine phenylpyruvic acid hydrogenation catalyst
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环戊二烯在非晶态NiP/SiO_2催化剂上加氢反应的动力学研究 认领 引用 被引量：5
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作者 刘波 王友臻 +1 位作者 王卫江 范康年 《复旦学报（自然科学版）》 CAS 北大核心 2002年第4期439-443,共5页
对环戊二烯在非晶态NiP/SiO2 催化剂上选择加氢生成环戊烯的反应进行了积分动力学研究 ,结果表明该反应机理较符合Rideal Eley模型 :由吸附态的氢直接和气相中的烯烃发生反应 .环戊二烯加氢生成环戊烯和环戊烯加氢生成环戊烷的活化能分... 对环戊二烯在非晶态NiP/SiO2 催化剂上选择加氢生成环戊烯的反应进行了积分动力学研究 ,结果表明该反应机理较符合Rideal Eley模型 :由吸附态的氢直接和气相中的烯烃发生反应 .环戊二烯加氢生成环戊烯和环戊烯加氢生成环戊烷的活化能分别为 5 7.1kJ·mol-1和 6 0 .2kJ·mol-1.由于吸附态的氢和气相中环戊二烯的有效碰撞频率较高 ,所以环戊二烯的加氢几率比环戊烯的加氢几率大 。 展开更多
关键词 积分动力学 非晶态NiP/SiO2催化剂 环戊二烯加氢 环戊烯
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