Abstract
Abstract Currently, some projects are underway to achieve high efficient conversion and reduce costs associated with H2 production. Biomass gasification is considered as a mature technology involving heat, steam, and oxygen to convert biomass to syngas including H2. Since biomass is treated as carbon neutral energy source, it can significantly reduce environmental impact. By integrating biomass conversion technology and carbon removal from environment, negative carbon emission can also be realized. In this study, co-production of H2 and power from black liquor (BL) is proposed based on enhanced process integration consisting of process integration and exergy recovery. The proposed system mainly consists of BL evaporation, gasification, syngas chemical looping (SCL), and power generation. The evaporation process employs exergy recovery using steam tube rotary evaporator. The effect of target moisture content on the evaporator performance is evaluated. Furthermore, the thermodynamics analysis of gasification is performed in circulating fluidized bed reactor based on Gibbs energy minimization. The SCL process comprises reducer, oxidizer and combustor and integrates with power generation. In addition, the concentrated CO2 can be generated during the SCL process, avoiding additional cost for separation.
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