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。