Page 124 - 《精细化工》2022年第6期
P. 124
第 39 卷第 6 期 精 细 化 工 Vol.39, No.6
2022 年 6 月 FINE CHEMICALS June 2022
催化与分离提纯技术
Ni 改性 Mo C/γ-Al O 催化剂在
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逆水气变换反应中的应用
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吴 勇 ,丁 巍 ,戴咏川 ,王宏浩 ,徐 明 ,宋官龙
(1. 辽宁石油化工大学 石油化工学院,辽宁 抚顺 113001;2. 辽宁宝来生物能源有限公司,辽宁 盘锦
124119)
摘要:以掺杂 Y 型分子筛的 γ-Al 2 O 3 为载体,七钼酸铵(AMT)、六次甲基四胺(HMT)为原料,NiCO 3 •2Ni(OH) 2 •
4H 2 O 为改性助剂,通过共浸渍和程序升温炭化法制备了 Mo 2 C/γ-Al 2 O 3 (MCAS)和 Ni 改性的 Ni-Mo 2 C/γ-Al 2 O 3
(MNCAS)催化剂。采用 XRD、ICP、N 2 吸附-脱附、TEM 和 EDS 对其进行了表征,考察了其在逆水气变换
反应中的催化性能。结果表明,MNCAS 催化剂出现了 Ni 3 Mo 3 N 的特征衍射峰,Ni 的加入有效改善了 Mo 2 C 的
聚集现象,并且该催化剂具有良好的介孔结构。MCAS 催化剂对逆水气反应有较高的催化活性,300 ℃时 CO
选择性为 93.87%,MNCAS-8 催化剂〔n(AMT)∶n(HMT) = 1∶8,Mo 和 Ni 的理论负载量分别为 30%和 5%,实
际负载量分别为 28.52%和 4.51%〕倾向于将 CO 2 转化成 CH 4 ,在低温段 CH 4 选择性达到 84.37%,生成的 Ni 3 Mo 3 N
有利于提高 CH 4 的选择性。
关键词:碳化钼;氮化镍钼;逆水气变换反应;催化剂;催化技术
中图分类号:X701;TQ426 文献标识码:A 文章编号:1003-5214 (2022) 06-1190-07
Application of Ni modified Mo 2C/γ-Al 2O 3 catalyst in
reverse water-gas shift reaction
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WU Yong , DING Wei , DAI Yongchuan , WANG Honghao , XU Ming , SONG Guanlong
(1. College of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China; 2.
Bora Bioenergy Co., Ltd., Panjin 124119, Liaoning, China)
Abstract: Mo 2C/γ-Al 2O 3 (MCAS) and Ni modified Ni-Mo 2C/γ-Al 2O 3 (MNCAS) catalysts were prepared
via co-impregnation and temperature-programmed carbonization using γ-Al 2O 3 doped Y molecular sieve as
carrier, ammonium heptadolybdate (AMT) and hexamethylenetetramine (HMT) as raw materials, and
NiCO 3•2Ni(OH) 2•4H 2O as modifying agent. The synthesized catalysts were characterized by XRD, ICP, N 2
adsorption-desorption, TEM and EDS, and their catalytic performances in reverse water-gas shift reaction
were further investigated. The analyses revealed that MNCAS catalysts displayed the characteristic
diffraction peaks of Ni 3Mo 3N with a good mesoporous structure, in which aggregation caused by Mo 2C was
effectively improved by the addition of Ni. Moreover, MCAS catalyst exhibited high catalytic activity for the
reverse water-gas shift reaction at 300 ℃ with CO selectivity of 93.87%. Meanwhile, MNCAS-8 catalyst
[n(AMT)∶n(HMT) = 1∶8, the theoretical and actual loading amount of Mo were 30% and 28.52%
respectively, and those of Ni were 5%, and 4.51%, respectively] showed a conversion tendency of CO 2 into
CH 4, the CH 4 selectivity reached up to 84.37% at low temperature range, which could be attributed to
Ni 3Mo 3N generated after Ni addition.
Key words: Mo 2C; Ni 3Mo 3N; reverse water-gas shift reaction; catalyst; catalysis technology
收稿日期:2021-11-20; 定用日期:2022-03-10; DOI: 10.13550/j.jxhg.20211184
基金项目:国家自然科学基金青年基金(21802061);中央引导地方科技发展专项基金(2021JH6/10500154);辽宁省教育厅重点攻关
科研项目(L2020001);抚顺英才计划(FSYC202101001)
作者简介:吴 勇(1996—),男,硕士生,E-mail:wuyong1996@126.com。联系人:丁 巍(1978—),女,副教授,E-mail:cicy1125@
163.com;戴咏川(1968—),女,副教授,E-mail:ych_dasic@163.com。