| NiFe2O4直接分解二氧化碳成碳循环反应过程结构演变研究 |
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| 引用本文： | 傅毛生,陈林深,陈诵英.NiFe2O4直接分解二氧化碳成碳循环反应过程结构演变研究[J].环境化学,2004,23(1):85-89. |
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| 作者姓名： | 傅毛生 陈林深 陈诵英 |
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| 作者单位： | 1. 浙江大学催化研究所,杭州,310028
2. 浙江大学催化研究所,杭州,310028;浙江大学分析测试中心,杭州,310028 |
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| 基金项目： | 国家自然科学基金资助课题(NO 2 0 2 770 3 3 ) |
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| 摘 要： | 用XRD Rietveld分析法，对共沉淀法制备的NiFe2O4在H2／CO2循环反应中的结构演变进行研究，发现随着循环反应次数的增加，NiFe2O4物相的含量逐渐降低，Fe2Ni1-x物相的含量及其(200)衍射的平均晶粒逐渐增大，并出现Fe3C物相，其含量增长较快．纯NiEe2O4经15次循环反应后，体系中NiFe2O4物相的含量只剩下5％左右，样品基本失去分解CO2的活性．NiFe2O4掺杂4％铬后，明显提高了NiFe2O4骨架结构的稳定性，虽经50次H2／CO2循环反应，体系中NiFe2O4物相含量仍然有20％，分解CO2的活性仍达到初始活性的40％．
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| 关 键 词： | 二氧化碳 氧缺位铁酸镍 分解 XRD分析 碳循环 结构演变 |
STUDY ON THE STRUCTURE CHANGE OF NiFe2O4 DURING THE CYCLE REACTION OF DECOMPOSITION OF CO2 TO C |
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| FU Mao sheng CHEN Lin shen , CHEN Song ying.STUDY ON THE STRUCTURE CHANGE OF NiFe2O4 DURING THE CYCLE REACTION OF DECOMPOSITION OF CO2 TO C[J].Environmental Chemistry,2004,23(1):85-89. |
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| Authors: | FU Mao sheng CHEN Lin shen CHEN Song ying |
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| Institution: | FU Mao sheng 1 CHEN Lin shen 1,2 CHEN Song ying 1 |
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| Abstract: | The structure change of NiFe 2O 4 prepared by co precipitation during H 2/CO 2 cycle reaction was determinded using XRD Rietveld analysis The results showed that when the cycle reaction times were increased,the phase abundaqdnce of NiFe 2O 4 decreased rapidly ,but the phase abundance of Fe X Ni 1- X and crystallite size of Fe X Ni 1- X (200)direction increased gradually,at the same time,there appeared the phase of Fe 3C whose content increased fast After 15 cycles,the phase abundance of NiFe 2O 4 is no more than 5%,simultaneously,the sample almost had no CO 2 decomposition activity When NiFe 2O 4 was doped with 4% Cr 3 ,its structure stability was dramatically raised After 50 cycles,the phase abundance of NiFe 2O 4 also had 20% whose activity of CO 2 decomposition was still 40% as much as initial one |
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| Keywords: | CO 2 decomposition oxygen deficient nickel ferrite XRD analysis |
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