摘要
采用机械化学法制备不同Co含量的Co-Ni-Al2O3催化剂。通过XRD、H2-TPR、N2吸附-脱附、SEM、XPS等表征手段和1,4-丁炔二醇(BYD)加氢制1,4-丁烯二醇(BED)评价实验,考察不同Co含量对Ni基催化剂结构和性能的影响。结果表明,Co含量为1%的催化剂Ni金属呈无定型态分布,比表面积大,为295 m^2/g。试样Ni-Co-1加氢性能最好,BYD转化率为30.19%,BED选择性为98.32%,收率为29.68%。这与该试样活性组分Ni呈无定型态、具有较大的比表面积、表面形貌为絮状体和活性金属Ni结合能较弱有较大关联。助剂Co在1%的添加量下具有较好的分散作用和"限域效应"。
Co-Ni-Al2O3 catalysts with different Co content were prepared by mechanochemical method.XRD,H2-TPR,N2 adsorption-desorption,SEM and XPS characterization methods and 1,4-butynediol(BYD) hydrogenation to produce 1,4-butenediol(BED) were introduced to investigate the effect of cobalt addition on the structure and performance of the Ni-based catalyst.Results showed that the catalyst with Co content of 1% was of amorphous nickel;the specific surface area was large to 295 m^2/g.The evaluation results indicated that the Ni-Co-1 catalyst(with Ni addition of 1%) revealed better hydrogenation behavior,with BYD conversion of 30.19%,BED selectivity of 98.32%,and BED yield of 29.68%.This is related to the fact that the Ni-Co-1 sample with active component Ni in amorphous state(XRD) was of large specific surface area,flocculent surface morphology,and lower binding energy for Ni-support,which demonstrated that the addition of cobalt showed better dispersion and "limited effect".
作者
莫文龙
郜宪龙
高峰
马凤云
陈隽
陈莉
MO Wen-long;GAO Xian-long;GAO Feng;MA Feng-yun;CHEN Jun;CHEN Li(Key Laboratory of Coal Clean Conversion&Chemical Engineering Process(Xinjiang Uyghur Autonomous Region),College of Chemistry and Chemical Engineering,Xinjiang University,Urumqi 830046,China;Xinjiang Markor Chemical Industrial Co.,Ltd.,Korla 841000,China)
出处
《应用化工》
CAS
CSCD
北大核心
2019年第11期2636-2640,2646,共6页
Applied Chemical Industry
基金
新疆维吾尔自治区重点研发计划项目(2017B02012)
