Abstract
Tar removal plays a key role in the process efficiency and viability of biomass gasification for syngas production applications. Among currently available tar treatment technologies, catalytic cracking was found to be the most attractive due to minimal energy losses by avoiding cooling of the raw product gas. Naturally available calcium-based catalysts, particularly stone dust and dolomite, have been proven to be effective for biotar cracking; however, they have poor resistance to attrition and undergo deactivation after a few carbonation/calcination cycles. As such, these characteristics play a critical role in determining the viability of their application at a large-scale. Hence to overcome the shortcomings previously stated, a novel dual supported calcium-based catalyst which includes a stable support with great mechanical strength (alumina, Al2O3, and mayenite, Ca12Al14O33) dosed with CaO nanoparticles was synthesized by wet impregnation of calcium on alumina particles with and without the assistance...
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