Ni对Pt∕γ-Al2 O3催化甲基环己烷脱氢性能的影响.pdf

化工进展
2016年第35卷増刊2
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
研究开发
Ni对Pt/γ-Al2O催化甲基环己烷脱氢性能的影响
童凤丫,孙清,邵一凡,缪长喜,王仰东,谢在库
(中国石油化工股份有限公司上海石油化工研究院,上海201208;2中国石油化工股份有限公司,北京100027)
摘要:采用饱和漫渍法制备了yAl2Oa负載的Pt单金属和PuNi双金属催化剂,用国定床反应器评价了催化剂
的甲基环己烷脱氢反应性能,以考察Ni对Pu/yAl2O2催化甲基环已烷脱氢性能的影响。结果表明,与单金属催
化剂相比,Pti双金属催化剂具有更好的脱氢活性和稳定性。氢氧滴定分析结果表明加入Ni后Pt的分散性能
变好,TEM分析表明加入Ni后金属颗粒尺す变大,结合氢氧滴定与TEM数据,认为掺入Ni之后形成了Pt-Ni
新的体系,此体系提高了催化剂表面上氯的结合能,最终提高了Pt-Ni双金属催化剂的脱活性和稳定性。此结
果为开发适用于有机液体儲氢材料脱氢的高效催化剂提供了思路
关键词:甲基环己烷;脱氢;稳定性:活性
中图分类号:TQ032
文献标志码:A
文章编号:1000-6613(2016)s2-0183-04
DOI:10.16085/j.issn.1000-6613.2016.s2.031
Effect of Ni on the catalytic performance of Pt/Y-A120, in
methylcyclohexane dehydrogenation
TONG Fengya SUN Qing, SHAO Yifan, MIAO Changzi, WANG Yangdong, XIE Zaiku
Shanghai Research Institute of Petrochemical Technology, China Petroleum &.Chemical Corporation
Shangh
208. China; China Petroleum &. Chemical Corporation. Beiing 100027. China)
Abstract: PT-NI bimetallic catalysts and the corresponding monometallic Pt catalysts supported
on Y-AL O were prepared by incipient wetness impregnation and characterized by X-ray
diffraction, H, -chemisorption and BET. Their activities for methylcyclohexane dehydrogenation
were investigated in a fixed bed reactor. The results showed that the PT-NI bimetallic catalyst
significantly enhanced hydrogen evolution and catalytic stability compared with Pt monometallic
catalyst. H, -chemisorption revealed that the adding of Ni increased the dispersion of Pt, while
TEM showed that a larger particle size of Pt. Combined the two charactcrization results, we
concluded that the adding of Ni leaded a new PT-NI system which increased the binding energy of
the bimetallic surface, and this finally increased the activity and stability of catalyst. The results
offered a new way to develop high efficiency dehydrogenation catalyst
Key words: methylcyclohexane; dehydrogenation; stability; activity
作为一种高效清洁能源,氢能在解决能源危机于加氢反应的技术较为成熟,而脱氢是强吸热并且
和缓解大气污染方面展现出良好应用前景。氯能利体积増大的反应、高温低压有利于脱氢反应的进
用包括氢气制备、储存、运输和应用等环节,其中行,但高温下易发生氢解及结焦等副反应,从而使
氯能储存是关键和难点”。基于可逆加、脱反催化剂的活性、选择性及稳定性下降,影响脱氢反
应循环的有机液体储氢技术(主要为甲基环己烷、应的效率,进而阻得加氢和脱氢可逆循环。因此
环己烷、十氢萘、四氢萘等)具有储氢密度高、便
于运输、储放过程无碳排放、符合绿色化学的要
收稿日期:2016-06-16;修改稿日期:2016-09-29。
第一作者及联系人:童风丫(1984-),女,博士研究生,研究方
求,被广花突に。在有机液体储氢技术中,基向为石油化工新能源。 E-mail tong.m