Abstract
In this study, Malaysian dolomites as secondary catalysts are placed at the downstream of the fluidized-bed gasifier. Three types of Malaysian dolomites with different elemental ratios of CaO-MgO content denoted as P1, P2, and P3 are investigated with EFB gasification reaction at different cracking temperatures (700–900 °C). The performance of the catalysts with a variation of catalyst to biomass weight ratio (C/B) (0.05 to 0.30 w/w) is evaluated. The findings showed that the total gas yield increased by 20%, hydrogen increased by 66%, along with an almost 99% reduction in tar content with P1 catalyst with the following reaction conditions: gasification temperature of 850 °C, equivalence ratio (ER) of 0.25, and cracking temperature of 900 °C. Malaysia dolomite could be a secondary catalyst to provide a better alternative, tar-free hydrogen-rich gas with the possibility of regeneration and re-use.
Highlights
As the world’s leading energy source, fossil fuels have resulted in economic instability, unacceptably high levels of GHG emissions, and unprecedented anthropogenic climate change [1]
Fossil fuels account for 80% of the energy demand which has led to fossil fuel depletion [2]
Dolomites from three different origins with different elemental composition [29] denoted as P1, P2, and P3 were employed as a catalyst in the gasification reaction in the downstream chamber
Summary
As the world’s leading energy source, fossil fuels have resulted in economic instability, unacceptably high levels of GHG emissions, and unprecedented anthropogenic climate change [1]. Fossil fuels account for 80% of the energy demand which has led to fossil fuel depletion [2] This has urged research to explore renewable sources as alternative sources of energy. Hydrogen production satisfies the increasing energy demand but is economically viable and technologically sustainable with similar technology employed without any significant change to replace fossil fuels [5,6]. Since it can be stored as gas or liquid, hydrogen is reasonably safe and adaptable for fueling car engines [7] and fuel for fuel cells, a highly efficient clean power production technology through electrochemical reactions [8]
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