双金属催化剂对煤焦油模型化合物催化裂解行为的影响

doi:10.11949/j.issn.0438-1157.20170517

化工学报 ›› 2017, Vol. 68 ›› Issue (10): 3805-3815.DOI: 10.11949/j.issn.0438-1157.20170517

• 催化、动力学与反应器 • 上一篇下一篇

双金属催化剂对煤焦油模型化合物催化裂解行为的影响

张艳敏, 邹达, 赵渊, 钟梅, 马凤云

新疆大学化学化工学院, 新疆维吾尔自治区煤炭清洁转化与化工过程重点实验室, 新疆乌鲁木齐 830046

收稿日期:2017-05-02 修回日期:2017-07-25 出版日期:2017-10-05 发布日期:2017-10-05
通讯作者: 钟梅,zhongmei0504@126.com
基金资助:
国家自然科学基金项目（21606187）；国家重点研发计划项目（2016YFF0102602）；新疆维吾尔自治区重点实验室开放课题项目（2016D03009）；自治区青年科技创新人才培养工程（QN2016SB0152）。

Effect of bimetallic catalysts on cracking behavior of coal tar model compounds

ZHANG Yanmin, ZOU Da, ZHAO Yuan, ZHONG Mei, MA Fengyun

Key Laboratory of Coal Clean Conversion & Chemical Engineering Process of Xinjiang Uygur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, Xinjiang, China

Received:2017-05-02 Revised:2017-07-25 Online:2017-10-05 Published:2017-10-05
Supported by:
supported by the National Natural Science Foundation of China (21606187), the National Key Research and Development Program (2016YFF0102602) and the Key Laboratory of Xinjiang Uygur Autonomous Region (2016D03009).

摘要/Abstract

摘要：

以Al₂O₃为载体，Ce、Co和Fe为助剂，采用机械化学法制备了4种镍基催化剂，对其进行了XRD、H₂-TPR、BET、NH₃-TPD等表征。当载气流量为50 ml·min^-1，裂解温度为750℃时，在固定床反应器中考察了各催化剂对煤焦油模型化合物甲苯+芘裂解行为的影响。结果表明：4种催化剂均为介孔催化剂，且双金属催化剂的介孔有序度更高；催化剂中活性组分Ni主要以尖晶石NiAl₂O₄的形式存在；添加Fe助剂后，催化剂的酸强度较Ni/Al₂O₃增加，添加Ce和Co时则相反。评价实验表明，助剂对重质组分芘的裂解率影响较小，约为67%，然而Ce和Co对催化剂的抗积炭性能有利，其析碳分别较无助剂时降低28.8%和18.0%。

关键词: 双金属催化剂, 模型化合物, 固定床, 酸强度

Abstract:

Four nickel based catalysts were prepared by mechanical chemical method,Al₂O₃ as carrier,Ce,Co and Fe as additives.The catalysts were characterized using XRD,H₂-TPR,BET and NH₃-TPD.The catalytic effects on cracking behavior of coal tar model compounds toluene and pyrene were investigated in a fixed-bed reactor under carrier gas flow rate of 50 ml·min^-1 and cracking temperature of 750℃.The experimental results showed that all four catalysts have higher ordered mesoporous structure and active species Ni mainly exists as NiAl₂O₄ spinel in the catalysts.In addition,acidic strength of catalyst with Fe additive was higher than that of Ni/Al₂O₃,while the opposite trend was observed in catalysts with Ce and Co additives.The cracking evaluation results showed that these additives have little effect on the cracking rate of heavy component pyrene,about 67% for all catalysts.However,Ce and Co additives were beneficial to carbon deposition resistance of catalysts,which carbon deposition,compared to none additive catalyst,was reduced by 28.8% and 18.0%,respectively.

Key words: bimetallic catalyst, model compound, fixed-bed, acidity

中图分类号:

TQ241.5

张艳敏, 邹达, 赵渊, 钟梅, 马凤云. 双金属催化剂对煤焦油模型化合物催化裂解行为的影响[J]. 化工学报, 2017, 68(10): 3805-3815.

ZHANG Yanmin, ZOU Da, ZHAO Yuan, ZHONG Mei, MA Fengyun. Effect of bimetallic catalysts on cracking behavior of coal tar model compounds[J]. CIESC Journal, 2017, 68(10): 3805-3815.

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双金属催化剂对煤焦油模型化合物催化裂解行为的影响

Effect of bimetallic catalysts on cracking behavior of coal tar model compounds

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