Abstract
The potential of catalytic pyrolysis of biomass for hydrogen and bio-oil production has drawn great attention due to the concern of clean energy utilization and decarbonization. In this paper, the catalytic pyrolysis of pine sawdust with calcined dolomite was carried out in a novel moving bed reactor with a two-stage screw feeder. The effects of pyrolysis temperature (700–900 °C) and catalytic temperature (500–800 °C) on pyrolysis performance were investigated in product distribution, gas composition, and gas properties. The results showed that with the temperature increased, pyrolysis gas yield increased, but the yield of solid and liquid products decreased. With the increase in temperature, the CO and H2 content increased significantly, while the CO2 and CH4 decreased correspondingly. The calcined dolomite can remove the tar by 44% and increased syngas yield by 52.9%. With the increasing catalytic temperature, the catalytic effect of calcined dolomite was also enhanced.
Highlights
Biomass is a carbon-neutral renewable fuel with significant potential to reduce greenhouse gas emissions
The results showed that with the increase in temperature from 300 ◦ C to 700 ◦ C, the non-condensable gas increased from 6.3 wt% to 17.5 wt%, while char yield decreased from 63.6 wt% to 30.6 wt% [14]
This study aims to study the high-temperature catalytic pyrolysis performance of pine sawdust for hydrogen-rich gas using calcined dolomite as a catalyst in a two-stage moving bed
Summary
Biomass is a carbon-neutral renewable fuel with significant potential to reduce greenhouse gas emissions. China has abundant biomass reserves, with an annual production of about 3.494 billion tons, including available straw resources (694 million tons) and forestry residues (350 million tons). All of this showed great potential for energy utilization [1]. Biomass can be converted into a variety of high-value products, including chemicals, biofuels and advanced materials by thermochemical and biochemical pathways. Among different technologies of biomass utilization, thermochemical conversion is the most efficient method with the shortest time scale of the process [2]. Pyrolysis is a promising technology for biofuels and chemicals and is considered a revolutionary and straightforward energy production method [6,7]
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