首页|Green synthesis of ZSM-5 using silica fume and catalytic co-cracking of lignin and plastics for production of monocyclic aromatics
Green synthesis of ZSM-5 using silica fume and catalytic co-cracking of lignin and plastics for production of monocyclic aromatics
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ZSM-5 with hierarchical pore structure was synthesized by a simple two-step hydrothermal crystalliza-tion from silica fume without using any organic ammonium templates.The synthesized ZSM-5 were oval shaped particles with a particle size about 2.0 μm and weak acid-dominated with proper Brønsted(B)and Lewis(L)acid sites.The ZSM-5 was used for catalytic co-cracking of n-octane and guaiacol,low-density polyethylene(LDPE)and alkali lignin(AL)to enhance the production of benzene,toluene,ethyl-benzene and xylene(BTEX).The most significant synergistic effect occurred at n-octane/guaiacol at 1∶1 and LDPE/AL at 1∶3,under the condition,the achieved BTEX selectivity were 24％and 33％(mass)higher than the calculated values(weighted average).The highest BTEX selectivity reached 88.5％,which was 3.7％and 54.2％higher than those from individual cracking LDPE and AL.The synthesized ZSM-5 exhibited superior catalytic performance compared to the commercial ZSM-5,indicating potential application prospect.
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