摘要
采用不同质量分数(5%~20%)NaOH溶液浸取商品Ni-Al合金粉(粒径180~250μm)制备Raney-Ni催化剂。通过XRD、TEM、N2吸附-脱附、EDS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,考察不同碱液浓度对Raney-Ni催化剂结构和性能的影响。结果表明:10%质量分数碱液浸取制备的催化剂试样RN10%在2θ为44.3°、51.7°、76.1°处出现了活性组分Ni的特征峰,分别对应于Ni(111)、Ni(200)和Ni(220),即生成了面心立方晶格结构的Ni,且晶粒尺寸较小;比表面积大,为58.07m^2/g;对Al的浸取量较为适中。评价结果表明,试样RN10%加氢性能最好,BYD转化率为37.46%,BED选择性为91.73%,收率为34.36%。这与该试样活性组分Ni晶粒尺寸小,残余的Ni2Al3相充当"结构促进剂",比表面积大,浸取Al含量适中有关。
Raney-Ni catalysts were prepared by leaching commercial Ni-Al alloy (Particle size 180-250 μm) with different mass fractions (5%-20%) of NaOH solution.Effects of different alkali concentrations on the structure and catalytic performance of Raney-Ni catalysts were investigated by XRD,TEM,N 2 adsorption-desorption,EDS and 1,4-butynediol (BYD) hydrogenation to prepare 1,4-butene glycol (BED).Results show that the characteristic peaks of the active component Ni appearing at 2 θ is 44.3°,51.7° and 76.1° for the RN10% catalyst are attributed to Ni (111)(face-centered cubic lattice structure of Ni),Ni (200) and Ni (220).The Ni grain size of RN10% catalyst is smaller than others,with specific surface area of 58.07 m^2/g,with moderate leaching amount of Al.Evaluation results show that the hydrogenation performance of RN10% is the best with the BYD conversion of 37.46%,the BED selectivity and yield of 91.73% and 34.36%,respectively.It is related to the smallest size of Ni grains in the active component of the sample,the residual Ni 2Al 3 phase as the "structural promoter",the largest specific surface area,and the moderate Al leaching content.
作者
张瑞玉
莫文龙
马凤云
钟梅
刘景梅
武洪丽
ZHANG Ruiyu;MO Wenlong;MA Fengyun;ZHONG Mei;LIU Jingmei;WU Hongli(Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region),College of Chemistry and Chemical Engineering,Xinjiang University,Urumqi 830046,China)
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2019年第4期669-675,共7页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
新疆维吾尔自治区重点研发计划项目(2017B02012)
新疆大学自然科学基金项目(BS160221)资助
