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

doi:10.11949/j.issn.0438-1157.20150660

Abstract

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

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

CLC Number:

O643

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.

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.

References 20

[1]	Levy R B, Boudart M. Platinum-like behavior of tungsten carbide in surface catalysis [J]. Science, 1973, 181(4099): 547-548.
[2]	Rodrigues J A J, Cruz G M, Bugli G, Boudart M, Djega-Mariadassou G. Nitride and carbide of molybdenum and tungsten as substitutes of iridium for the catalysts used for space communication [J]. Catalysis Letters, 1997, 45(1/2): 1-3.
[3]	Chen X W, Zhang T, Ying P L, Zheng M Y, Wu W C, Xia L G, Li T, Wang X D, Li C. A novel catalyst for hydrazine decomposition: molybdenum carbide supported on gamma-Al2O3 [J]. Chemical Communications, 2002, 3: 288-289.
[4]	Sun Jun(孙军), Wang Xingtang(王兴棠), Wang Xiaodong(王晓东), Zheng Mingyuan(郑明远), Wang Aiqin(王爱琴), Zhang Tao(张涛). Hydrazine decomposition and CO adsorption microcalorimetry on tungsten carbides with different phase [J]. Chinese Journal of Catalysis(催化学报), 2008, 29(8): 710-714.
[5]	Sui Zhijun(隋志军), Li Ping(李平), Zhou Jinghong(周静红), Zhu Yi'an(朱贻安), Chen De (陈德), Zhou Xinggui(周兴贵). Manipulating microstructural properties of carbon nanofibers and their application in catalysis [J]. CIESC Journal(化工学报), 2014, 65(1): 22-311.
[6]	Pan Bin(潘彬), Sun Dan(孙丹), Liu Weifeng(刘伟凤), Ye Yaoli(叶遥立), Guo Jian(郭剑), Cheng Shao'an(成少安). Effect of anode construction on performance of microbial fuel cells [J]. CIESC Journal(化工学报), 2014, 65(8): 3250-3254.
[7]	Vieira R, Pham-Huu C, Keller N, Ledoux M J. New carbon nanofiber/graphite felt composite for use as a catalyst support for hydrazine catalytic decomposition [J]. Chemical Communications, 2002, 3: 954-955.
[8]	Vieira R, Bernhardt P, Ledoux M, Pham-Huu C. Performance comparison of Ir/CFF and Ir/Al2O3 catalysts in a 2 N hydrazine microthruster [J]. Catalysis Letters, 2005, 99(3/4): 177-180.
[9]	Vieira R, Bastos-Netto D, Ledoux M, Pham-Huu C. Hydrazine decomposition over iridium supported on carbon nanofibers composite for space applications: near actual flight conditions tests [J]. Applied Catalysis A: General, 2005, 279(1/2): 35-40.
[10]	Pham-Huu C, Keller N, Roddatis V V, Mestl G, Schlögl R, Ledoux M J. Large scale synthesis of carbon nanofibers by catalytic decomposition of ethane on nickel nanoclusters decorating carbon nanotubes [J]. Physical Chemistry Chemical Physics, 2002, 4(3): 514-521.
[11]	Liang C H, Tian F P, Feng Z C, Wei Z B, Li C. Preparation and adsorption properties for thiophene of nanostructured W2C on ultrahigh-surface-area carbon materials [J]. Chemistry of Materials, 2002, 15(25): 4846-4853.
[12]	Park H, Kim M H, Hwang Y K, Chang J S, Kwon Y U. Sonochemical syntheses and catalytic properties of oxide and carbide nanocomposites on carbon nanotubes [J]. Chemisty Letters, 2005, 34(2): 224-223.
[13]	Yang Z H, Cai P J, Shi L Gu Y L, Chen L Y, Qian Y T. A facile preparation of nanocrystalline Mo2C from graphite or carbon nanotubes [J]. J. Solid State Chemistry, 2006, 179(1): 29-32.
[14]	Li X Y, Ma D, Chen L M, Bao X H. Fabrication of molybdenum carbide catalysts over multi-walled carbon nanotubes by carbothermal hydrogen reduction [J]. Catalysis Letters, 2007, 116(1/2): 63-69.
[15]	Chen X W, Zhang T, Zheng M Y,Wu Z L, Wu W C, Li C. The reaction route and active site of catalytic decomposition of hydrazine over molybdenum nitride catalyst [J]. Journal of Catalysis, 2004, 224(2): 473-478.
[16]	Chen X W, Zhang T, Zheng M Y, Xia L G, Li T, Wu W C, Wang X D, Li C. Catalytic decompositon of hydrazine over α-Mo2C/g-Al2O3 catalysts [J]. Industrial & Engineering Chemistry Research, 2004, 43(19): 6040-6047.
[17]	Keim W. Handbook of Heterogeneous Catalysis//Hydrazine decomposition [M]. Weinheim: Wiley-VCH, 1997: 1795-1799.
[18]	Maurel R, Menezo J C. Catalytic decomposition of 15N-labeled hydrazine on alumina-supported metals [J]. Journal of Catalysis, 1978, 51(2): 293-295.
[19]	He Lei(贺雷), Huang Yanqiang(黄延强), Wang Aiqin(王爱琴), Wang Xiaodong(王晓东), Zhang Tao(张涛). Review of hydrous hydrazine as a liquid hydrogen storage material [J]. Chemical Industry and Engineering Process(化工进展), 2014, 33(11): 2956-2962.
[20]	Sun J, Zheng M Y, Wang X D, Wang A Q, Cheng R H, Li T, Zhang T. Catalytic performance of activated carbon supported tungsten carbide for hydrazine decomposition [J]. Catalysis Letters, 2008, 123(1/2): 150-155.