Chemical looping CO2/CH4 reforming using Fe-based oxygen carrier for syngas production

doi:10.11949/j.issn.0438-1157.20160698

Abstract

Abstract:

The chemical looping based on Fe₃O₄/FeO oxygen carrier was employed in the CO₂/CH₄ reforming to produce syngas. The process was simulated and analyzed using the Aspen Plus software to evaluate the performance of the system. CH₄ conversion rate, CO₂ conversion rate, energy efficiency and H₂/CO ratio in the syngas produced were calculated and the optimum operation conditions were obtained. Sensitivity analysis of the system including reactor temperature and pressure, and Fe₃O₄/CH₄ and CO₂/CH₄ ratios were also performed. It was found that CH₄ conversion rate of 97.91%, CO₂ conversion rate of 32.76%, energy efficiency of 93.77% and H₂/CO ratio of 0.93 in the syngas produced were obtained at the optimum operating conditions in the system. The results indicated that the system could potentially bring about considerable conversion rates of CH₄ and CO₂. Furthermore, the produced syngas with a lower H₂/CO ratio was suitable for the synthesis of dimethyl ether.

Key words: greenhouse gas, chemical looping reforming, syngas, dimethyl ether, simulation

摘要：

提出一种铁基氧载体（Fe₃O₄/FeO）化学链CO₂重整CH₄方法制备合成气。为评价该系统的性能，采用Aspen Plus软件对其进行过程模拟和热力学分析。以CH₄转化率、CO₂转化率、能源利用效率和产气氢碳比（H₂/CO）为评价指标，得到系统的优化运行条件，并研究各操作参数（包括各反应器的温度和压力、氧载体甲烷比和CO₂甲烷比）对系统性能的影响。结果表明：当系统处于优化工况时，得到CH₄转化率为97.91%、CO₂转化率为32.76%、能源利用效率为93.77%及产气氢碳比为0.93。该系统能有效利用CO₂和CH₄这两种温室气体获得较低氢碳比的合成气，利于二甲醚的高效合成。

关键词: 温室气体, 化学链重整, 合成气, 二甲醚, 模拟

CLC Number:

TE665

HE Yinglong, YU Dunxi, LEI Timan, LÜ Weizhi, XU Minghou. Chemical looping CO₂/CH₄ reforming using Fe-based oxygen carrier for syngas production[J]. CIESC Journal, 2016, 67(12): 5222-5228.

何映龙, 于敦喜, 雷体蔓, 吕为智, 徐明厚. 铁基氧载体化学链CO₂重整CH₄方法制备合成气[J]. 化工学报, 2016, 67(12): 5222-5228.

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Chemical looping CO₂/CH₄ reforming using Fe-based oxygen carrier for syngas production

铁基氧载体化学链CO₂重整CH₄方法制备合成气

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