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在双颗粒流化床连续热解反应装置(PPFB)中考察松木生物质在MS-5A、MS-13X和HZSM-5分子筛作用下的催化加氢热解产物分布和收率并与SiO_2条件下的结果进行比较。结果表明:分子筛的孔道结构能促进松木生物质催化加氢热解的二次气相分解反应,有效控制其催化加氢热解的产物分布;MS-5A孔径(5?)过小,对轻质芳烃化合物(HCL)苯、甲苯、二甲苯和萘(BTXN)的选择性不高;大孔径(10?)的MS-13X对轻质芳烃具有较好的选择性;孔径介于MS-5A和MS-13X之间的HZSM-5的催化热解加氢过程,不仅可获得较高的HCL收率,还可得到较好分布的轻质碳氢化合物气体(HCG)产物,973 K时,其HCL和HCG收率分别为3.44%和14.98%。
The distribution and yield of catalytic pyrolysis products of pine wood biomass under the action of MS-5A, MS-13X and HZSM-5 molecular sieves were investigated in a two-particle fluidized bed continuous pyrolysis reaction unit (PPFB) The results are compared. The results showed that the pore structure of molecular sieve can promote the secondary gas phase decomposition reaction of pine biomass pyrolysis and effectively control the product distribution of catalytic pyrolysis. The pore size of MS-5A (5?) Is too small, Selectivity of aromatic hydrocarbons (HCL) to benzene, toluene, xylene and naphthalene (BTXN) is not high; the large pore size (10?) Of MS-13X has good selectivity for light aromatic hydrocarbons; The catalytic pyrolysis hydrogenation of HZSM-5 between MS-13X not only achieves higher yield of HCL, but also produces a better distribution of light hydrocarbon gas (HCG) products. At 973 K, The yields of HCL and HCG were 3.44% and 14.98%, respectively.