原位XRD反应装置下H2O对Fe5C2的物相及F-T反应性能影响的研究  

In situ XRD study of the effect of H2O on Fe5C2 phase and Fischer-Tropsch performance

作　　者：郭天雨 刘粟侥 青明 冯景丽 吕振刚 王洪 杨勇[1,3] GUO Tian-yu;LIU Su-yao;QING Ming;FENG Jing-li;Lu Zhen-gang;WANG Hong;YANG Yong(State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;University of Chinese Academy of Sciences,Beijing 100049,China;National Energy Center for Coal to Liquids,Synfuels China Co.Ltd,Beijing 101407,China)

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [2]中国科学院大学,北京100049 [3]中科合成油技术有限公司国家能源煤基液体燃料研发中心,北京101407

出　　处：《燃料化学学报》2020年第1期75-82,I0005,共9页Journal of Fuel Chemistry and Technology

基　　金：中科合成油技术有限公司在设备和资金方面给予本研究工作的大力支持

摘　　要：将原位XRD反应装置与在线气相色谱技术结合,研究了不同H 2O含量(4.36%、1.68%、0.56%)条件下单一相Fe 5C 2的氧化速率,并考察了不同Fe 5C 2氧化程度(0、25%、55%、68%)和氧化次数对其费托合成(F-T)反应性能的影响。研究结果表明,Fe 5C 2物相的氧化速率随H 2O含量的提高而逐渐增加,同时H 2O氧化使Fe 5C 2颗粒粒径减小,暴露出更多活性位点,造成F-T反应活性提高,且氧化程度越大,活性提高越明显;随着氧化次数的增加,F-T反应活性逐渐提高,但CH 4选择性增加,C 5+选择性逐渐降低。In situ XRD reaction device combined with the online gas chromatography was used to study the oxidation behavior of the effect of H 2O content(4.36%,1.68%,0.56%)on the phase and Fischer-Tropsch synthesis(FTS)performance of the single phase Fe 5C 2.The results show that the oxidation rate of the Fe 5C 2 phase increases with the increase of the content of injected H 2O.Meanwhile,the particle size of Fe 5C 2 phase decreases and more active sites exposes during the H 2O oxidation,resulting in the increase of the FTS activity.Furthermore,the FTS activity increases with the increase of the oxidation times,but the selectivity of CH 4 increases and the C 5+selectivity decreases gradually.

关 键 词：Fe 5C 2 水汽氧化 原位XRD 费托合成 

分 类 号：O643[理学—物理化学]