title: On a clean power generation system with the co-gasification of biomass and coal in a quadruple fluidized bed gasifier.
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 CO2capture 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 (ŋten), total exergy efficiency (ŋtex) and carbon sequestration rate (Rcs) 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 ŋtenand ŋtexcould be ∼50% and ∼47%, and Rcscould be over unit.
authors.affiliation: Institute of Combustion and Thermal System, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China. Electronic address: lbyan@bjtu.edu.cn.
authors.forename: Linbo
authors.initials: L
authors.lastname: Yan
authors.affiliation: Institute of Combustion and Thermal System, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China.
authors.forename: Boshu
authors.initials: B
authors.lastname: He
mesh_terms: D018533:Biomass; D057965:Carbon Sequestration; D003031:Coal; D005740:Gases; D010100:Oxygen; D013227:Steam
chemical_list: D003031:Coal; D005740:Gases; D013227:Steam; D010100:Oxygen
keywords: Carbon capture; Chemical looping; Control strategy; Exergy analyses