(507c) Catalytic Fast Co-Pyrolysis of Waste Greenhouse Plastic Films and Rice Husk over an HZSM-5/MCM-41 Catalyst
AIChE Annual Meeting
2020 Virtual AIChE Annual Meeting
Forest and Plant Bioproducts Division
Thermochemical Conversion of Biomass
Wednesday, November 18, 2020 - 8:30am to 8:45am
Based the on results, we propose an overall pathway for the catalytic fast pyrolysis over the hierarchical HZSM-5/MCM-41 catalyst. The waste greenhouse plastic films serve as a hydrogen donor for the hydrocarbon pool. The pyrolysis of the mixture of feedstocks produces primary vapors, which interact with MCM-41 mesoporous structures, leading to cracking of large molecular weight oxygenated chemicals. Next, the cracked oxygenates move through the HZSM-5 catalyst. The pore diameter of HZSM-5 catalyst is similar to the dynamic diameters of some hydrocarbons ,causing it to have a significant shape-selective effect on the aromatic hydrocarbons products. The vapors diffuse into the internal pores of HZSM-5 catalyst and form aromatic hydrocarbons through a common intermediate in the HZSM-5 framework. The composite molecular sieve has higher catalytic activity then HZSM-5 alone. Therefore, co-catalytic fast pyrolysis of rice husk and waste greenhouse plastic films over HZSM-5/MCM-41 may be a viable option to increase production of hydrocarbons from pyrolysis.