Modeling of biomass gasification polygeneration

Abstract

Abstract A single biomass gasification technology often struggles to simultaneously meet the requirements of efficiency, economy, and environmental sustainability. Hence, this paper establishes a biomass gasification polygeneration model, integrating biomass gasification with the subsequent utilization of syngas. The system comprises parallel chemical and power units, enabling polygeneration activities such as methane production and electricity generation through syngas derived from gasification units. Within the system, syngas are split: a portion is directed to the methane synthesis unit for methane production, while the remainder is sent to the combined cycle unit for electricity generation. Concurrently, the tail gas produced after methane synthesis enters the combined cycle unit. Throughout this process, by-product steam is utilized for grade matching in each section of the chemical synthesis side, with any excess steam utilized for steam turbine power generation. Using the established polygeneration model, this study examines the influence of gasification temperature on the performance of the polygeneration system.