中文摘要：

提出一种铁基氧载体（Fe_3O_4/FeO）化学链CO_2重整CH_4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CH_4转化率、CO_2转化率、能源利用效率和产气氢碳比（H_2/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CO_2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CH_4转化率为97.91%、CO_2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CO_2和CH_4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。

英文摘要：

The chemical looping based on Fe_3O_4/FeO oxygen carrier was employed in the CO_2/CH_4 reforming to produce syngas. The process was simulated and analyzed using the Aspen Plus software to evaluate the performance of the system. CH_4 conversion rate, CO_2 conversion rate, energy efficiency and H_2/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 Fe_3O_4/CH_4 and CO_2/CH_4 ratios were also performed. It was found that CH4 conversion rate of 97.91%, CO-2 conversion rate of 32.76%, energy efficiency of 93.77% and H_2/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 CH_4 and CO_2. Furthermore, the produced syngas with a lower H_2/CO ratio was suitable for the synthesis of dimethyl ether.