碱液浓度对1,4-丁炔二醇加氢Raney-Ni催化剂结构和性能的影响  

Influence of Alkali Concentration on the Structure and Catalytic Performance of Raney-Ni Catalyst in 1,4-Butynediol Hydrogenation

作　　者：张瑞玉 莫文龙[1] 马凤云[1] 钟梅[1] 刘景梅[1] 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)

机构地区：[1]新疆大学化学化工学院煤炭洁净转化与化工过程新疆维吾尔自治区重点实验室

出　　处：《石油学报（石油加工）》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

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.

关 键 词：1 4-丁炔二醇 1 4-丁烯二醇 加氢 Raney-Ni催化剂 碱液浓度 

分 类 号：O643.32[理学—物理化学]