微波作用下焦油模型化合物——甲苯裂解实验研究

Experiment of Cracking of Tar Model Compound Toluene Under Microwave

针对不同的热载体C,Al2O3以及上述载体添加催化活性组份Ni时在微波加热与普通电炉加热的条件下对焦油模型化合物甲苯进行裂解实验研究,考察了不同加热方式、催化活性组份与不同热载体对甲苯裂解的影响。研究结果表明:采用微波加热与普通加热相比,对甲苯的裂解无明显影响,但对积C率有一定的抑制作用;当甲苯的进料浓度为4.86～5.80 g/Nm3,空时为0.124～0.125 s,对不同床料微波加热时裂解率为26.24%～55%,而对于普通加热时,在650℃下,与微波相同的床料下普通加热的裂解率为66.02%～100%;催化活性中心体Ni对其载体有明显催化选择性;甲苯在裂解的同时,有少部分甲苯向芳香族程度增加方向进行了转化。

Using different heating carrier C, A1203 and adding catalytic material Ni on the carriers, research the cracking of tar model compound toluene with the materials under microwave heating and ordinary oven, investigates the influence of heating method, catalytic component, heat carrier to cracking of toluene. The results show that there is no obvious influence to toluene cracking with microware heating or with ordinary heating, but microwave heating has certain in- hibiting function on carbon build-up ; when the inlet concentration of toluene is 4.86-5.80 g/Nm3, space-time is 0.124-0.125 s, towards different bed material, the microwave heating cracking rate is 26.24%-55%; and to ordinary heating, under 650℃, the ordinary heating cracking rate with the same bed material is 66.02%-100%; catalytic activity center-Ni has obvious catalytic seletivi- ty on the carrier; meanwhile the crack of toluene, there is small sum of toluene transforming to high aromatic series degree.