Research On Efficient Gasification Of Bio-oil To Produce Hydrogen-rich Syngas

Due to the shortage of fossil fuels, the exploitation and utilization of renewable energies have gained extensive attention in recent years. Biomass nenrgy is one kind of a renewable energy source with good development potential,and the bio-oil is easy to be storaged and has high energy density advantages. Therefore, the bio-oil used to produce hydrogen-rich syngas with directly or catalytic gasification method is economical and promising hydrogen production methods.Firstly, the investigations of pyrolysis under N2atmosphere and combustion of bio-oil with diffierent O2contents were preformed by using TG analyzer. The characteristics of pyrolysis and combustion of bio-oil were analyzed, and kinetic mechanism model were also obtained. The release behaviors of the products of pyrolysis were made on-line analysis by thermo-gravimetric analyzer coupled with Fourier Transform Infrared Spectroscopy.Secondly, the characteristics of direct gasification of bio-oil were investigated with a fixed bed reactor. It was found that, H2yields and selectivity of the C element were increasing as the temperature rising;The date of H2/(CO+CO2) ratio between0.95～1.6,and H2/CO ratio between1.0～1.65,demonstrated that the gas got form gasification of bio-oil was a hydrogen-rich syngas.Finally, the gasification system was also used to study catalytic properties of bio-oil with three different Si/Al ratio catalyst of HZSM-5. Experimental results show that HZSM-5(Si/Al=50) has a most activity for the catalytic gasification of bio-oil. At780℃,the C selectivity and H2conversion rate reached70.1%and33.6%, However the figure just reach to64%and29.1%without the catalyst, respectively.In this paper, through experimental study, It will provide further experimental and theoretical basis in the gasification of bio-oil field to produce hydrogen-rich Syngas.