纳米碳纤维/碳毡负载碳化钨和碳氮化钨的肼分解性能

doi:10.11949/j.issn.0438-1157.20150660

化工学报 ›› 2015, Vol. 66 ›› Issue (8): 2976-2981.DOI: 10.11949/j.issn.0438-1157.20150660

• 催化、动力学与反应器 • 上一篇下一篇

纳米碳纤维/碳毡负载碳化钨和碳氮化钨的肼分解性能

孙军, 黄延强, 张涛

中国科学院大连化学物理研究所, 催化基础国家重点实验室, 辽宁大连 116023

收稿日期:2015-05-21 修回日期:2015-05-28 出版日期:2015-08-05 发布日期:2015-08-05
通讯作者: 黄延强
基金资助:
国家自然科学基金项目(21103173,21476226)。

Catalytic performance of cabon fiber felt supported tungsten carbide and tungsten carbonitride for hydrazine decomposition

SUN Jun, HUANG Yanqiang, ZHANG Tao

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China

Received:2015-05-21 Revised:2015-05-28 Online:2015-08-05 Published:2015-08-05
Supported by:
supported by the National Natural Science Foundation of China (21103173, 21476226).

摘要/Abstract

摘要：

以纳米碳纤维/碳毡(CFF)为载体,分别采用碳热氢气还原法和碳热氨气还原法制备了负载型碳化钨、碳氮化钨整体催化剂,XRD结果表明催化剂的活性相分别为W₂C和WC_xN_y, TEM表征发现其粒子尺寸分别为2～40 nm和2～20 nm。采用1 N肼分解推力器评价了上述催化剂的反应性能,W₂C/CFF和WC_xN_y/CFF表现出了相比于Ir/CFF更好的肼分解综合性能:除了初活性略低以外,启动加速性、稳态燃压以及比活性均高于贵金属Ir催化剂。此外,W₂C/CFF和WC_xN_y/CFF催化剂的稳定性明显优于Ir/CFF,这主要是由于CFF载体在贵金属Ir的作用下发生了更显著的甲烷化反应。

关键词: 纳米碳纤维, 肼, 推力器, 催化剂, 载体, 失活

Abstract:

Cabon fiber felt (CFF) supported tungsten carbide and tungsten carbonitride were prepared using a carbonthermal hydrogen reduction process and a carbonthermal ammonia reduction process, respectively. The XRD and TEM results indicated the formation of W₂C and WC_xN_y phase on the above samples with the corresponding particle size range of 2—40 nm and 2—20 nm, respectively. It was found that both catalysts exhibited desired catalytic performances in a one Newton hydrazine microthruster. The properties, including the ignition delay, the steady chamber pressure as well as the steady catalyst bed temperature over the W₂C/CFF and WC_xN_y/CFF catalysts, were better than those over the Ir/CFF. Moreover, due to the negligible activity in methanation reaction, the tungsten-based catalysts exhibited a higher stability than the Ir/CFF catalysts.

Key words: carbon nanofiber, hydrazine, microthruster, catalyst, support, deactivation

中图分类号:

O643

孙军, 黄延强, 张涛. 纳米碳纤维/碳毡负载碳化钨和碳氮化钨的肼分解性能[J]. 化工学报, 2015, 66(8): 2976-2981.

SUN Jun, HUANG Yanqiang, ZHANG Tao. Catalytic performance of cabon fiber felt supported tungsten carbide and tungsten carbonitride for hydrazine decomposition[J]. CIESC Journal, 2015, 66(8): 2976-2981.

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纳米碳纤维/碳毡负载碳化钨和碳氮化钨的肼分解性能

Catalytic performance of cabon fiber felt supported tungsten carbide and tungsten carbonitride for hydrazine decomposition

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