生物质焦油模拟物重整制取富氢气体实验研究

以流化床作为反应器，进行生物质焦油模拟物(苯)催化重整制取富氢气体的实验研究，主要探究实验温度(780℃~900℃)、水蒸气/焦油模拟物质量比S/T (3.0~6.0)、床高(5.0cm~20.0cm)和床料(催化剂)对焦油模拟物重整制取富氢气体过程的影响。实验结果表明，焦油模拟物重整制取富氢气体的理想操作工况分别是温度为860℃~900℃，S/T 值为5.0，床层高度为15.0cm~20.0cm；通过比较，在上述理想操作条件下，合成的碱土金属催化剂(20CaAl)具有较好的催化活性，而其改性后的SCaFeNiAl催化剂具有更好的活性。在SCaFeNiAl作用下，焦油模拟物重整过程的活化能为58.87kJ/mol，指前因子为1.36×10⁷h^-1，且获得较好的实验效果，H₂体积分数为67.28%，H₂产率为303.50g/kg-tar，焦油模拟物转化率为95.93%，总气体产率为5.05m³/kg-tar。

Experimental research on model compound reforming of biomass tar to produce H2-rich gas

The tar model compound (benzene) reforming to produce hydrogen-rich gas was investigated in a fluidized bed, where the steam acts as the gasification medium. The influences of operating parameters on producing hydrogen-rich gas were fully investigated by changing the reactor temperature, the ratio of steam mass to tars mass(S/T) and the bed height; in addition, the effects of various bed materials(catalysts) on the reforming reaction are also focused on in this paper. The reactor temperature was varied from 780℃ to 900℃, S/T from 3.0 to 6.0, and the bed height from 5.0cm to 20.0cm. The experimental results demonstrate that the optimum operating parameters for producing hydrogen-rich gas are the reactor temperature of 860℃~900℃, S/T of 5.0 and the bed height of 15.0cm~20.0cm. Under the condition of optimum operation, the synthesized alkaline earth metal-based catalyst (20CaAl) displays a better catalysis than natural ores(dolomite and limestone). And the modified catalyst SCaFeNiAl based on 20CaAl exhibits a higher catalytic activity with the activation energy of 58.87kJ/mol and pre-exponential factor of 1.36×10⁷h^-1. With SCaFeNiAl, the H₂ content of 67.28%, the H₂ yield of 303.50(g/kg-tar), the tar conversion ratio of 95.93% and the total gas yield of 5.05(m³/kg-tar) are obtained.