Sustainability evaluation of biomass direct gasification using chemical looping technology for power generation with and w/o CO2 capture. (15th August 2020)

• Record Type: Journal Article
• Authors: Mohamed, Usama; Zhao, Yingjie; Huang, Yi; Cui, Yang; Shi, Lijuan; Li, Congming; Pourkashanian, Mohamed; Wei, Guoqiang; Yi, Qun; Nimmo, William
• Is Part Of: Energy. Volume 205(2020)
• Publication Date: 2020-08-15
• Subjects: Biomass gasification -- Chemical looping -- Power generation -- CO2 capture -- Sustainability assessment; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2020.117904
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Sawdust direct gasification using chemical looping with hematite as an oxygen carrier was investigated in a 10 kWth interconnected fluidized bed reactor. This was used to develop a biomass chemical looping gasification combined cycle (BCLGCC) model using Aspen Plus software. A technical analysis of a scaled up, simulated and validated 650 MW power plant using BCLG experimental results and industrial data was conducted. The analysis focused on investigating critical parameters that have a significant effect on syngas quality and quantity, hence optimizing the gasification process to obtain higher energy efficiencies for subsequent power generation. An economic and sustainability assessments comparing BCLGCC with 4 different power generation technologies with and w/o CCS was performed. BCLGCC presents promising economic and environmental results, showing that the efficiencies of the CCS and Non-CCS plants are equal to 36% and 41%, respectively, with a COE (including government renewable energy subsidies) for both CCS and Non-CCS equal to 15.9 ¢/kWh and 12.8 ¢/kWh, both of which are lower than the average COE in the UK (approximately 17.7 ¢/kWh). This highlights the technical and economic potential and feasibility of BCLGCC compared to conventional power generation processes while promoting Bioenergy with Carbon Capture and Storage (BECCS) technology. Graphical abstract: Image 1 Highlights: A reliable BCLGCC simulation process at 650 MW is established and validated. The entire BCLGCC process is optimized to obtain the optimal power output. BCLGCC with and w/o CCS present a net efficiency of approximately 36% and 41%. BCLGCC with and w/o CCS shows a COE of 21.7 ¢/kWh and 18.4 ¢/kWh. Sustainability assessment of BCLGCC is conducted and compared to other power plants.