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不同条件下铱负载催化剂性能的比较研究
引用本文:Zahra Amirsardari,Akram Dourani,Mohamad Ali Amirifar,Nooredin Ghadiri Massoom. 不同条件下铱负载催化剂性能的比较研究[J]. 矿物冶金与材料学报, 2021, 28(7): 1233-1239. DOI: 10.1007/s12613-020-2058-4
作者姓名:Zahra Amirsardari  Akram Dourani  Mohamad Ali Amirifar  Nooredin Ghadiri Massoom
作者单位:Space Transportation Research Institute,Iranian Space Research Center,Tehran,Iran
摘    要:To discuss the potential role of iridium (Ir) nanoparticles loaded under atmospheric and high pressures, we prepared a series of catalysts with the same active phase but different contents of 10wt%, 20wt%, and 30wt% on gamma-alumina for decomposition of hydrazine. Under atmospheric pressure, the performance of the catalyst was better when 30wt% of the Ir nanoparticles was used with chelating agent that had greater selectivity of approximately 27%. The increase in the reaction rate from 175 to 220 h?1 at higher Ir loading (30wt%) was due to a good dispersion of high-number active phases rather than an agglomeration surface. As a satisfactory result of this investigation at high pressure, Ir catalysts with different weight percentages showed the same stability against crushing and activity with a characteristic velocity of approximately 1300 m/s.

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Comparative characterization of iridium loading on catalyst assessment under different conditions
Zahra Amirsardari,Akram Dourani,Mohamad Ali Amirifar,Nooredin Ghadiri Massoom. Comparative characterization of iridium loading on catalyst assessment under different conditions[J]. International Journal of Minerals,Metallurgy and Materials, 2021, 28(7): 1233-1239. DOI: 10.1007/s12613-020-2058-4
Authors:Zahra Amirsardari  Akram Dourani  Mohamad Ali Amirifar  Nooredin Ghadiri Massoom
Abstract:To discuss the potential role of iridium (Ir) nanoparticles loaded under atmospheric and high pressures, we prepared a series of cata-lysts with the same active phase but different contents of 10wt%, 20wt%, and 30wt% on gamma-alumina for decomposition of hydrazine. Un-der atmospheric pressure, the performance of the catalyst was better when 30wt% of the Ir nanoparticles was used with chelating agent that had greater selectivity of approximately 27%. The increase in the reaction rate from 175 to 220 h-1 at higher Ir loading (30wt%) was due to a good dispersion of high-number active phases rather than an agglomeration surface. As a satisfactory result of this investigation at high pressure, Ir catalysts with different weight percentages showed the same stability against crushing and activity with a characteristic velocity of approxim-ately 1300 m/s.
Keywords:iridium nanoparticles  catalyst activity  laboratory reactor  atmospheric pressure  high pressure
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