高寒^1,,
董艳春^1,,
周术元¹
1.军事科学院防化研究院，国民核生化灾害防护国家重点实验室，北京 100191
基金项目: 国家自然科学基金资助项目21701186国家自然科学基金资助项目(21701186)

Thermocatalytic decomposition of a sarin simulating agent by metal oxides supported on γ-Al2O3

GAO Han^1,,
DONG Yanchun^1,,
ZHOU Shuyuan¹
1.State Key Laboratory of National Nuclear Biological and Chemical Disaster Protection, Research Institution of Chemical Defense, Academy of Military Science, Beijing 100191, China

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摘要:为了考察负载型金属氧化物催化剂对毒剂的热催化分解性能，以γ-Al2O3为载体，金属氧化物(Mn、Ni、Fe、Co、Cu和Ce)为活性组分，采用等体积浸渍法制备了负载型金属氧化物催化剂，对沙林毒剂模拟剂——甲基膦酸二甲酯(DMMP)进行了热催化分解评价实验，分别研究了不同反应温度、空速条件下热催化分解性能的变化规律。结果表明，在几种负载型金属氧化物催化剂中，CuO/γ-Al2O3表现出了最佳的防护性能。通过调控CuO负载量(1%~20%)，发现5% CuO/γ-Al2O3具有较高的分散度和比表面积，热催化分解性能最好。磷物种的沉积造成催化剂比表面积的降低和晶体结构的破坏，是催化剂活性下降的主要原因。
关键词: 甲基膦酸二甲酯/
金属氧化物/
热催化分解/
化学防护

Abstract:In order to investigate the performance of supported metal oxide catalysts on thermocatalytic decomposition of chemical warfare agents, an equivalent volume impregnation method was used to load the active components of metal oxides (including Mn, Ni, Fe, Co, Cu and Ce) on the carrier of γ-Al2O3. The experiments of thermocatalytic decomposition of dimethyl methylphosphonate (DMMP), a sarin simulating agent, were conducted, and the variations of thermocatalytic decomposition performance under different reaction temperatures and space velocities were studied. The results showed that CuO/γ-Al2O3 had the best protection performance among several supported metal oxide catalysts. Through adjusting the CuO loading amount from 1% to 20%, it was found that 5% CuO/γ-Al2O3 exhibited the best thermocatalytic decomposition activity with higher dispersion and specific surface area. The deposition of phosphorus species caused the loss of specific surface area and crystal structure destruction, accounting for the decrease in catalyst activity.
Key words:dimethyl methylphosphonate/
metal oxide/
thermocatalytic decomposition/
chemical protection.

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刊出日期:2019-06-03

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γAl2O3负载金属氧化物热催化分解沙林毒剂模拟剂

高寒^1,,
董艳春^1,,
周术元¹
1.军事科学院防化研究院，国民核生化灾害防护国家重点实验室，北京 100191
基金项目: 国家自然科学基金资助项目21701186国家自然科学基金资助项目(21701186)
关键词: 甲基膦酸二甲酯/
金属氧化物/
热催化分解/
化学防护
摘要:为了考察负载型金属氧化物催化剂对毒剂的热催化分解性能，以γ-Al2O3为载体，金属氧化物(Mn、Ni、Fe、Co、Cu和Ce)为活性组分，采用等体积浸渍法制备了负载型金属氧化物催化剂，对沙林毒剂模拟剂——甲基膦酸二甲酯(DMMP)进行了热催化分解评价实验，分别研究了不同反应温度、空速条件下热催化分解性能的变化规律。结果表明，在几种负载型金属氧化物催化剂中，CuO/γ-Al2O3表现出了最佳的防护性能。通过调控CuO负载量(1%~20%)，发现5% CuO/γ-Al2O3具有较高的分散度和比表面积，热催化分解性能最好。磷物种的沉积造成催化剂比表面积的降低和晶体结构的破坏，是催化剂活性下降的主要原因。

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