作　　者： ; ; ; ; ;

机构地区： 中国科学院

出　　处： 《太阳能学报》 2010年第7期800-805,共6页

摘　　要： 在固定床反应器上进行了自制多孔白云石颗粒催化裂解乙酸、苯等焦油模型化合物的动力学实验研究,考察了反应温度(873～1123K)、接触时间(0.3～2.0s)等反应条件对乙酸、苯转化率的影响。实验结果表明:乙酸、苯转化率均随反应温度与接触时间的增加而上升,当反应温度为1123K、停留时间为2.0s时,乙酸、苯的最大转化率分别为99.8%和18.7%;通过对乙酸与苯的催化裂解动力学分析,得出乙酸、苯的反应速率常数变化范围分别为0.41～3.64s^(-1)和0.00718～0.11300s^(-1),活化能分别为71.4kJ·mol^(-1)和94.5kJ·mol^(-1)。经检验,模型计算与实验结果能较好吻合。 Catalytic cracking of biomass gasification tar over porous granular dolomite catalyst with acetic acid and benzene as model compounds was studied in a fixed-bed reactor. The experiments were carried out at temperature of 873-1123K and under contact time ranging from 0.3s to 2.0s. The results indicated that the conversion rates of acetic acid and benzene increases with increasing temperature and contact time （r）, and reached their maximum values of 99.8 % and 18.7% respectively at T = 1123K, and v = 2.0s. A first-order kinetic reaction model of acetic acid and benzene cata- lytic cracking over porous granular dolomite was proposed. The calculated reaction rate constants of acetic acid and benzene catalytic cracking were 0. 41-3.64s-1 and 0. 00718-0.11300s-1, and activation energy of the two reactions were 71.4kJ. mol- 1 and 94.5kJ. mol- 1 , respectively. By comparison, the calculated values agreed well with the experimental data.

关 键 词： 生物质 焦油 白云石 催化裂解 动力学模型

领　　域： [动力工程及工程热物理]