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1.中北大学 化学与化工学院,山西 太原 030051
2.潞安化工集团有限公司,山西 长治 046000
王立言(1992—),博士,讲师,研究方向为C1化学,E-mail:20220058@nuc.edu.cn。
王志鹏(1988—),博士,讲师,研究方向为炔化催化剂,E-mail:20200004@nuc.edu.cn。
收稿:2025-07-30,
修回:2025-12-27,
网络出版:2026-01-21,
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王立言,谭余杭,杨晓军等.Pd改性ZnCr氧化物催化合成气制异丁醇性能研究[J].低碳化学与化工,
WANG Liyan,TAN Yuhang,YANG Xiaojun,et al.Study on catalytic performances of Pd-modified ZnCr oxides for syngas to isobutanol[J].Low-Carbon Chemistry and Chemical Engineering,
王立言,谭余杭,杨晓军等.Pd改性ZnCr氧化物催化合成气制异丁醇性能研究[J].低碳化学与化工, DOI:10.12434/j.issn.2097-2547.20250333.
WANG Liyan,TAN Yuhang,YANG Xiaojun,et al.Study on catalytic performances of Pd-modified ZnCr oxides for syngas to isobutanol[J].Low-Carbon Chemistry and Chemical Engineering, DOI:10.12434/j.issn.2097-2547.20250333.
合成气制异丁醇是实现碳资源高效利用的重要途径,然而现有催化剂存在产物收率低的问题。采用共沉淀-浸渍法制备了一系列Pd改性ZnCr催化剂并研究了其催化性能。结合XRD和XPS等表征方法研究了Pd质量分数对催化剂构效关系的影响,并分析了不同催化剂作用下的合成气制异丁醇反应路径。结果表明,Pd的引入可增大催化剂表面氧空位和活性羟基含量,进而促进CO的活化与转化;同时,Pd可通过优化中间体的稳定性,有效抑制烃类和甲醇等副产物的生成。在温度为400 ℃、压力为10 MPa、空速为3000 h
-1
和
V
(H
2
):
V
(CO) = 2:1的条件下,Pd质量分数为0.5%的Pd-ZnCr催化剂具有较好的催化性能,其CO转化率为30.6%,总醇选择性为44.1%,异丁醇选择性为23.6%。
Syngas to isobutanol is a crucial route for the efficient utilization of carbon resources. However
conventional catalysts suffer from limited product selectivity. A series of Pd-modified ZnCr catalysts were prepared via coprecipitation-impregnation method and the catal
ytic performances of catalysts were investigated. Effects of Pd mass fractions on structure-activity relationships of catalysts were characterized by XRD
XPS and so on
and the reaction pathways of syngas to isobutanol with different catalysts were analyzed. The results show that the introduction of Pd can increase the contents of surface oxygen vacancies and active hydroxyls
thereby promoting activation and conversion of CO. Meanwhile
Pd can optimize the stabilities of intermediates and effectively suppress the formation of by-products such as hydrocarbons and methanol. Under reaction conditions of temperature of 400 °C
pressure of 10 MPa
space velocity of 3000 h
-1
and
V
(H
2
):
V
(CO) = 2:1
Pd-ZnCr catalyst with Pd mass fraction of 0.5% exhibits good catalytic performance
with CO conversion rate of 30.6%
total alcohol selectivity of 44.1% and isobutanol selectivity of 23.6%.
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