生物质气一步法合成二甲醚本征动力学研究

INTRINSIC KINETICS OF DIMETHYL ETHER SYNTHESIS FROM BIOMASS-SYNGAS IN A FIXED BED REACTOR

采用双功能催化剂,在压力3～6MPa,反应温度220～270℃,质量空速3.0～6.0L/(gcat.h)条件下,在固定床反应器中对脱碳生物质气一步法合成二甲醚动力学进行研究。用单纯形法与遗传算法相结合进行优化拟合模型参数,回归得到对应于甲醇合成、甲醇脱水和水煤气变换反应的反应动力学表达式,经检验该模型可靠,模型计算值与实验数据吻合良好。

The intrinsic kinetics of the synthesis of dimethyl ether（DME） from biomass-syngas in the tubular fix bed reactor over the bifunctional catalyst, which was prepared by mixing methanol synthesis catalyst （JC207） and dehydration catalyst （zeolite HZSM-5 ）, was studied at the temperature of 220 to 270℃, the pressure of 3.0 to 6.0MPa, and the space velocity of 3.0-6.0L/（ gcat. h）. The parameters of the kinetics model were obtained by using simplex method combined with genetic algorithm. The model was reliable and could describe the experimental results adequately.