文献类型：期刊文献

中文题名：Ni-B/Al2O3催化1-辛炔选择性加氢反应

英文题名：Selective Hydrogenation of 1-Octyne over Ni-B/Al2O3 Catalyst

作者：赵多[1,2];曹约强[1];刘仲能[2];周兴贵[1];袁渭康[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237;[2]中国石油化工股份有限公司上海石油化工研究院绿色化工与工业催化国家重点实验室,上海201208

年份：2019

卷号：35

期号：4

起止页码：325

中文期刊名：化学反应工程与工艺

外文期刊名：Chemical Reaction Engineering and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；

基金：国家重点研发计划材料基因工程关键技术与支撑平台专项(2017YFB0702800)。

语种：中文

中文关键词：镍催化剂;镍硼催化剂;1-辛炔;选择加氢

外文关键词：Ni catalyst;Ni-B catalyst;1-octyne;selective hydrogenation

摘要：采用硼氢化钾还原方法制备了Ni-B/Al2O3催化剂,并与传统高温加氢还原法制备的Ni/Al2O3催化剂进行对比.通过X射线衍射(XRD)、透射电子显微镜(TEM)、氢气程序升温还原(H2-TPR)、紫外-可见漫反射光谱(UV-vis DRS)及X射线光电子能谱(XPS)等方法对催化剂结构和性质进行表征,并对催化剂进行1-辛炔加氢性能考评.结果表明,由于硼氢化钾还原能力较弱,Ni-B/Al2O3催化剂表面Ni0含量小于氢气还原的催化剂,但是其活性金属粒径更小,因而加氢反应活性仍与Ni/Al2O3相近.此外,Ni-B/Al2O3催化剂中Ni处于富电子状态,减弱了1-辛烯的吸附,显著提高了1-辛烯选择性.在1-辛炔转化率为99%时,1-辛烯选择性仍高达91%.
Ni/Al2O3 and Ni-B/Al2O3 catalysts were prepared by hydrogen and potassium borohydride reduction respectively,and were characterized by X-ray diffraction(XRD),Transmission electron microscope(TEM),H2-temperature program reduction(H2-TPR),UV-visible diffuse-reflectance spectrum(UV-vis DRS)and X-ray photoelectron spectroscopy(XPS).The catalytic performance of prepared catalysts was evaluated by selective hydrogenation of 1-octyne.Physicochemical characterizations revealed that the introduction of chemical reduction method resulted in the formation of small Ni nanoparticles,the limited amount of Ni active sites for hydrogenation and the presence of electron-enriched Ni species.Owing to the decreased Ni particle size,Ni-B/Al2O3 catalyst exhibited good activity compared to the Ni/Al2O3 catalyst with more active sites but larger size.The electron-enriched Ni species weakened the adsorption of 1-octene and thus suppressed over hydrogenation of 1-octene,which contributed to the obviously enhanced selectivity.As a result,Ni-B/Al2O3 showed 91%of 1-octene selectivity at 99%of 1-octyne conversion.