On a clean power generation system with the co-gasification of biomass and coal in a quadruple fluidized bed gasifier. (July 2017)

• Record Type: Journal Article
• Authors: Yan, Linbo; He, Boshu
• Is Part Of: Bioresource technology. Volume 235(2017)
• Page Start: 113
• Page End: 121
• Publication Date: 2017-07
• Subjects: Chemical looping -- Carbon capture -- Exergy analyses -- Control strategy; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.03.087
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: A power generation system based on a quadruple fluidized bed gasifier is designed. The detailed model for the entire system is built with Aspen Plus. Sensitivity analyses are done to detect the effects of key operating parameters. Energy and exergy balance calculations for the whole system are implemented. Energy efficiency of the system is ∼50% and the carbon emission can be negative. Abstract: A clean power generation system was built based on the steam co-gasification of biomass and coal in a quadruple fluidized bed gasifier. The chemical looping with oxygen uncoupling technology was used to supply oxygen for the calciner. The solid oxide fuel cell and the steam turbine were combined to generate power. The calcium looping and mineral carbonation were used for CO2 capture and sequestration. The aim of this work was to study the characteristics of this system. The effects of key operation parameters on the system total energy efficiency ( ŋ ten ), total exergy efficiency ( ŋ tex ) and carbon sequestration rate ( R cs ) were detected. The energy and exergy balance calculations were implemented and the corresponding Sankey and Grassmann diagrams were drawn. It was found that the maximum energy and exergy losses occurred in the steam turbine. The system ŋ ten and ŋ tex could be ∼50% and ∼47%, and R cs could be over unit.