(440b) Catalytic Pyrolysis of Bio-Oil Model Compounds over La/Ce/Ni Modified HZSM-5 Zeolites

With the contradiction between supply and demand of petroleum resources and environmental pollution, more and more attention has been paid to the study of clean and renewable energy, especially converting bio-oil into biofuel. Bio-oil catalytic pyrolysis has several advantages, such as low capital cost, easy handling and safe controlling. It has been widely used in improving the quality of bio-oil, for fossil fuels and chemicals production.

The experimental present a catalytic strategy to upgrade a simulated bio-oil consisting of ethyl acetate, diacetone alcohol, furfural and guaiacol, aiming to study the effect of La/Ce/Ni modified HZSM-5 zeolites on catalytic pyrolysis. The catalysts properties are investigated by BET and NH₃-TPD and the major constituents of the pyrolytic products are carried out by GC/MS. The results have pointed out the yield of organic compounds is increased from 42.26% to 65.05% by Ce-HZSM-5, whilst keeping lower coke formation rates after adding metal cations under the condition of T=450â??, WHSV=4 h^-1. The major components of catalytic pyrolysis are aromatic hydrocarbons, ketones, phenols and so on. The optimal selectivity of aromatic reached 46.37% over Ce-HZSM-5. The La-HZSM-5 improved the selectivity of partial deoxidation products from 4.88% to 21.97% .