ADN在Pd-Zn体系中的催化分解研究  

Catalytic decomposition of ammonium dinitramide over Pd-Zn catalyst

作　　者：鹿小林 丛伟民 侯宝林[2] 朱少敏[1] 王晓东[2] LU Xiao-lin CONG Wei-min HOU Bao-lin ZHU Shao-min WANG Xiao-dong(School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning Province, China Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Da]ian 116028, Liaoning Province, China)

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028 [2]中国科学院大连化学物理研究所,辽宁大连116028

出　　处：《化学工程》2017年第7期61-64,73,共5页Chemical Engineering(China)

基　　金：国家自然科学基金面上资助项目(21676266)

摘　　要：二硝酰胺铵(ADN)是一种无毒高比冲的单组元推进剂。实现ADN水溶液的高效催化分解对于推力器启动和产生稳定推力起着至关重要的作用。文中采用浸渍法制得不同质量比(10∶0.2,10∶1,10∶5)的Pd-Zn/Al_2O_3双金属催化剂。利用TGA-DTA和MS-online对相关的催化分解动力学和反应机理进行了研究,同时使用TEM等对催化剂形貌进行了表征。结果表明,Pd-Zn/Al_2O_3双金属催化剂能够实现ADN的一步分解,微量Zn的加入能起到稳定和分散金属Pd的作用。当Pd和Zn的质量比为10∶0.2时,催化剂具有良好催化活性和稳定性,并且使二硝酰胺铵(ADN)催化分解向生成较高N_2含量的方向进行。Ammonium dinitramide （ADN） is a non-toxic and high specific impulse monopropellant. Efficiently catalytic decomposition of ADN aqueous solutions is critical for starting-up the thruster and producing the steady thrust. Pd-Zn bimetallic catalysts with the different mass ratio （10 ： 0.2, 10 ： 1 , 10 ： 5 ） were prepared by impregnation method. The decomposition kinetics and reaction mechanics were characterized by TGA-DTA and MS- online. TEM was employed to investigate the relevant morphology of catalyst. The experimental results show that the decomposition of ADN can be completed in one step over the Pd-Zn/Al2O3 bimetallic catalysts, and the addition of minute quantities of Zn can improve the stability and dispersion of Pd over Al2O3. The catalyst with the mass ratio of Pd-Zn 10 ： 0.2 has good activity and stability, over which the decomposition product of ADN is shifted to higher content of N2.

关 键 词：Pd-Zn双金属催化剂 单组元推进剂 ADN催化分解 无毒 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]