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常压下,利用实验室制备的Ni-Ce/Al2O3催化剂,进行了热等离子单独重整与热等离子体催化耦合重整CH4和CO2制合成气的实验研究。实验中,催化剂被放置在等离子体反应区,催化剂床层由高温等离子射流气体加热。固定原料气配比V(CO2)/V(CH4)=1、等离子体工作载气流量0.8 m3/h及放电功率3.5 kW不变,考察了原料气总流量对原料转化率、产物选择性、化学能效和催化剂积碳速率的影响;并探讨了助剂Ce在重整反应中的作用。结果表明:随原料气总流量的增加,CH4和CO2转化率降低,H2和CO选择性无明显变化,C2H2选择性和催化剂积碳速率增加。热等离子催化耦合重整比热等离子单独重整具有较高的原料转化率、H2和CO选择性、化学能效值和较低的C2H2选择性。
Atmospheric pressure, the use of laboratory prepared Ni-Ce / Al2O3 catalyst, thermal plasma single reforming and thermal plasma catalytic reforming CH4 and CO2 syngas research. In the experiment, the catalyst was placed in the plasma reaction zone and the catalyst bed was heated by the high temperature plasma jet gas. The relationship between the total feed gas flow rate and the feedstock conversion, product selectivity, feedstock gas selectivity and feed rate was investigated. The results showed that the ratio of feedstock gas V (CO2) / V (CH4) = 1, the carrier gas flow rate 0.8 m3 / Chemical energy efficiency and catalyst carbon deposition rate; and discussed the role of Ce in the reforming reaction. The results show that with the increase of the total feed gas flow rate, the conversion of CH4 and CO2 decreases, the selectivity of H2 and CO has no obvious change, the selectivity of C2H2 and the rate of carbon deposition increase. Thermal plasma catalytic reforming has the advantages of higher conversion of raw materials, H2 and CO selectivity, chemical energy efficiency and lower C2H2 selectivity than the thermal plasma single reforming.