Page 162 - 《精细化工》2022年第8期
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第 39 卷第 8 期                             精   细   化   工                                  Vol.39, No.8
             2022 年 8 月                              FINE CHEMICALS                                 Aug.  2022


              催化与分离提纯技术
                              碱土金属对 CuZrO 催化剂上乙醇
                                                                2

                                    制备酮类化合物性能的影响



                                             1
                                                                       3
                                                                                    3*
                                                         2*
                                   魏   玲 ,曾春阳 ,解红娟 ,武应全
                 (1.  太原学院  公共实验中心,山西  太原   030032;2.  中国石油和化学工业联合会,北京  100723;3.  中
                 国科学院山西煤炭化学研究所,煤转化国家重点实验室,山西  太原  030001)
                 摘要:以碱土金属通过共沉淀法改性 CuZrO 2 催化剂,制得了不同碱土金属改性的 M-CuZrO 2 催化剂(M=Mg、
                 Ca、Sr 和 Ba),并将其用于催化乙醇一步法制备酮类化合物的反应中。采用 BET、XRD、氢气程序升温还原
                 (H 2 -TPR)、乙醇程序升温表面反应(乙醇-TPSR)、CO 2 程序升温脱附(CO 2 -TPD)以及 XPS 对催化剂的体相结
                 构、性质进行了研究。结果表明,以碱土金属 Ba 改性的 Ba-CuZrO 2 催化剂上 Cu 2p 3/2 结合能较高,有利于乙醇分
                 子中 O—H 键断裂形成乙醛,且该催化剂表面乙醛脱附量最大、中强碱性位(晶格氧)碱性最强,明显促进了缩
                                                                          –1
                 合反应的进行。在 350  ℃、0.1 MPa、N 2 为载气、气时空速(GHSV)为 2000 h 、乙醇进样量为 1.8 mL C 2 H 5 OH /(mL cat ·h)
                 的条件下,Ba-CuZrO 2 催化剂上乙醇转化率和酮类产物选择性最高,分别为 98.1%和 51.1%,且在 45 h 内具有较好的
                 催化稳定性。
                 关键词:碱土金属;CuZrO 2 催化剂;乙醇;酮类化合物;缩合反应;催化技术
                 中图分类号:O643.36      文献标识码:A      文章编号:1003-5214 (2022) 08-1662-06



                       Effect of alkaline-earth metals on the catalytic performance of
                                   CuZrO 2 for ketone synthesis from ethanol


                                         1
                                                                                        3*
                                                                         3
                                                          2*
                                WEI Ling , ZENG Chunyang , XIE Hongjuan , WU Yingquan
                 (1. Public Experimental Center, Taiyuan University, Taiyuan  030032, Shanxi,  China; 2. China Petroleum Chemical
                 Industry Federation, Beijing 100723,China; 3. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry,
                 Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China)
                 Abstract: M-CuZrO 2  catalysts (M=Mg, Ca, Sr and Ba) were prepared by modification of CuZrO 2  catalysts
                 with different alkaline-earth metals via co-precipitation method, and then employed to catalyze the one-step
                 synthesis of ketones from ethanol. The structure and properties of catalysts obtained were characterized and
                 analyzed by BET, XRD, H 2 -TPR,ethanol-TPSR,CO 2 -TPD and XPS. The results  showed that Ba-CuZrO 2
                 catalyst exhibited higher Cu 2p 3/2  electron binding energy, which was in favor of the O—H bond breakage in
                 ethanol molecules to acetaldehyde formation. Moreover, Ba-CuZrO 2  catalyst displayed largest acetaldehyde
                 desorption and strongest alkalinity of medium strength alkaline site (lattice oxygen), which demonstrated a
                 significant promotion effect  on the condensation reaction. Under reaction conditions of 350  ℃, 0.1  MPa,
                                            –1
                 N 2  as  carrier gas, GHSV 2000 h  and ethanol feed of 1.8  mL C 2 H 5 OH /(mL cat ·h), catalysis with Ba-CuZrO 2
                 achieved  highest ethanol conversion  rate  and ketone product selectivity, 98.1% and 51.1%  respectively.
                 Moreover, Ba-CuZrO 2 catalyst maintained stable catalytic activity within 45 h.
                 Key words: alkaline-earth  metals; CuZrO 2 catalyst; ethanol;  ketones; condensation reaction; catalysis
                 technology


                 收稿日期:2022-04-11;  定用日期:2022-06-08; DOI: 10.13550/j.jxhg.20220335
                 基金项目:山西省高等学校科技创新项目(2021L577);山西省自然科学基金(20210302123009)
                 作者简介:魏   玲(1982—),女,博士,E-mail:weiling0904@126.com。联系人:曾春阳(1983—),男,助理研究员,E-mail:
                 zengcy@cpcif.org.cn;武应全(1981—),男,助理研究员,E-mail:wuyq@sxicc.ac.cn。
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