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Targeting efficient biomass gasification

Chinese Journal of Chemical Engineering 2021年第5期34卷 268-278页

作者： saneliswa magagula Jiangze Han Xinying Liu Baraka C.Sempuga Institute for the Development of Energy for African Sustainability(IDEAS) University of South AfricaScience CampusFloridaJohannesburg 1710South Africa Department of Chemistry University of Puerto RicoRio Piedras CampusSan JuanPR 00931USA College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018China International Joint Laboratory of New Energy Hebei University of Science and TechnologyShijiazhuang 050018China

The sustainability of biomass use as a primary energy source depends on the efficiency of its conversion *** key contributing factors are well understood,owing to extensive experimental and theoretical modeling efforts in *** this manuscript,we present a systematic study of the thermochemical conversion route that allows us to target desirable outcomes when converting biomass to other fuels and *** process synthesis techniques that include material,energy and work balances,we identify the best targets to consider for highly efficient processes given specific *** analysis shows that by supplying the right amount of oxygen,a 100%carbon conversion efficiency can be achieved for certain applications that require gas as *** the objective is to obtain a cleaner fuel from biomass,converting it to char is most efficient in terms of carbon and energy *** to our analysis,an energy neutral biomass gasification process is theoretically possible over a wide range of H_(2) and CO production *** demonstrate its feasibility by simulating the process on Aspen Plus®.The simulation reveals that with heat integration,we can achieve the energy neutral target at a hydrogen production rate of 0.9 mol/mol *** further show that even at zero energy requirement,biomass gasification processes can have excess chemical potential,which can be recovered as useful work or conserved by producing more *** low temperature heat in the form of steam at 102℃ gives an 8% gain in chemical potential conservation and increases the hydrogen production rate by 60%.The insights revealed in this work allow for better decision making in early stages of process design,and consequently,more efficient biomass gasification processes.

关键词： Biomass Gasification Gasification thermodynamics Biomass conversion efficiency Process targeting

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