Abstract
Gasification of lignocellulosic biomass requires the effective removal method of tar. This study focused on the application of specially designed Mg/Al-layered double hydroxides clinoptilolite (Mg/Al-LDH@clinoptilolite) to improve the removal efficiency of tar, which would eventually lead to enhancing the power efficiency of gasification, preventing damage to facilities, and deducing durability improvement plans. Zeolite-layered double hydroxides impregnated with clinoptilolite, a natural zeolite, and Mg/Al-layered double hydroxide incorporated into conventional water scrubbers were prepared to enhance the removal efficiency of the tar and improve the quality of the syngas produced during the gasification process. The simultaneous removal of moisture and CO2 in the syngas was also investigated during the removal of the tar. The drastic decrease in tar and CO2 concentration was confirmed, which triggered a relative increase in the effective content of inflammable gas. The findings of the present study provide a practical approach to increasing power efficiency and durability during the gasification of lignocellulosic biomass.
Highlights
IntroductionStrategy of the Republic of Korea” on 7 December 2020
Fossil fuels should be replaced as major energy sources with renewable energy sources that are both safe to use and have low carbon emissions to accelerate energy conversion and facilitate carbon neutralization [1]
The main components of the tar generated in this process are mixed oxygenates, heterocyclic ethers, alkyl phenolics, polycyclic aromatic hydrocarbons (PAHs), and phenolic ethers
Summary
Strategy of the Republic of Korea” on 7 December 2020 According to this strategy, fossil fuels should be replaced as major energy sources with renewable energy sources that are both safe to use and have low carbon emissions to accelerate energy conversion and facilitate carbon neutralization [1]. Small-scale dispersive gasification power generators that use thinning-out trees or waste wood as raw materials instead of fossil fuels are more likely to aid in achieving carbon neutrality than fossil fuels such as coal. The tar generated during the gasification of lignocellulosic biomass comprises condensed hydrocarbons containing 1–5 benzene rings [4,5]. The main components of the tar generated in this process are mixed oxygenates, heterocyclic ethers, alkyl phenolics, polycyclic aromatic hydrocarbons (PAHs), and phenolic ethers. As the reaction proceeds in the gasification reactor, the components of the tar change from high molecular-weight
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