Page 142 - 《精细化工》2021年第10期
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第 38 卷第 10 期                            精   细   化   工                                 Vol.38, No.10
             2021 年 10 月                             FINE CHEMICALS                                  Oct.  2021


              催化与分离提纯技术
                            强静电吸附法制备 PdZn /Al O 催化
                                                                              2
                                                                        x
                                                                                   3
                                         1,4-丁炔二醇选择加氢



                                                          *
                                                                                             *
                           石   闯,蒙龙伟,陈   霄 ,吴洁文,范欣悦,梁长海
                 (大连理工大学  化工学院  精细化工国家重点实验室  先进材料与催化工程实验室,辽宁  大连  116024)

                 摘要:针对 1,4-丁炔二醇选择加氢反应特性,以强静电吸附法可控地制备了一系列 Pd、Zn 不同物质的量比的
                 PdZn x /Al 2 O 3 双金属催化剂,并探究 Zn 的引入对催化加氢性能的影响。研究发现,少量 Zn 的添加能够保持催化
                 剂在较高活性的情况下,大幅度改善其对中间产物 1,4-丁烯二醇的选择性。其中,PdZn 2 /Al 2 O 3 催化剂表现出较
                 高的催化活性和顺式-1,4-丁烯二醇的选择性。反应在 50 ℃、1 MPa 的条件下进行,1,4-丁炔二醇在接触时间为 6
                 g cat ·h/mol 时的转化率为 91%,顺式-1,4-丁烯二醇的选择性可达到 86%。结合程序升温还原与 X 射线电子衍射光
                 谱分析发现,前驱体经 400 ℃焙烧和 400 ℃还原处理后形成了 PdZn 双金属催化剂。Zn 原子的掺入有效调变了
                 Pd 活性位点的几何效应和电子效应,抑制了中间产物的过渡加氢。
                 关键词:双金属催化剂;1,4-丁炔二醇;Pd 基催化剂;选择加氢;结构调控;催化技术
                 中图分类号:TQ223.1;TQ426      文献标识码:A      文章编号:1003-5214 (2021) 10-2072-09



                   PdZn x/Al 2O 3 catalysts prepared by strong electrostatic adsorption for
                                    selective hydrogenation of 1,4-butynediol


                                                           *
                                                                                                    *
                    SHI Chuang, MENG Longwei, CHEN Xiao , WU Jiewen, FAN Xinyue, LIANG Changhai
                 (State Key Laboratory of Fine Chemicals, Laboratory of  Advanced Materials  and Catalytic Engineering, School of
                 Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China)

                 Abstract: A  series of  PdZn x/Al 2O 3  bimetallic catalysts with  different  molar ratios of Pd to Zn were
                 prepared in a controlled manner  by strong electrostatic adsorption  for the selective hydrogenation  of
                 1,4-butynediol (BYD), and the effect of Zn on the catalytic hydrogenation was investigated. It was found
                 that introducing a small amount of Zn was able to maintain high activity of the catalyst and greatly improve
                 its selectivity for the intermediate  cis-1,4-butenediol (cis-BED). PdZn 2/Al 2O 3 catalyst exhibited high
                 catalytic activity with 91% conversion and selectivity for cis-BED (86%) under the conditions of 50 ℃, 1
                 MPa H 2  pressure, and contact time of 6  g cat·h/mol. In addition, temperature-programmed reduction and
                 X-ray photoelectron spectroscopy results showed that the precursor was calcined at 400 ℃  and reduced at
                 400 ℃  to form the PdZn bimetallic catalyst. The doping of Zn atoms effectively modulated the geometrical
                 and electronic effects  of the Pd active sites, which effectively inhibited the over-hydrogenation  of the
                 intermediate products.
                 Key words: bimetallic catalyst; 1,4-butynediol; Pd-based catalyst; semi-hydrogenation; structure
                 engineering; catalysis technology


                 顺式 1,4-丁烯二醇(cis-BED)在维生素 A 和                  通过在温和条件下 1,4-丁炔二醇(BYD)选择加氢
                                                                   [3]
            B 6 的合成领域具有广泛应用           [1-2] 。目前,该产品主要          获得 。常用催化剂为林德拉(Lindlar)催化剂,其活

                 收稿日期:2021-03-25;  定用日期:2021-05-25; DOI: 10.13550/j.jxhg.20210316
                 基金项目:大连市科技创新基金(2019J12GX028,2018RQ09);2020 年中-法“蔡元培”交流合作项目;中央高校基本科研业务费
                 (DUT21LK02)
                 作者简介:石   闯(1996—),男,硕士生,E-mail:scdlut@163.com。联系人:陈   霄(1985—),男,副教授,E-mail:xiaochen@dlut.edu.cn;
                 梁长海(1971—),男,教授,E-mail:changhai@dlut.edu.cn。
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