A systematic approach to evaluating environmental-economic benefits of high-gravity technology for flue gas purification and municipal solid waste incineration fly ash utilization
Journal
Journal of Environmental Chemical Engineering
Journal Volume
9
Journal Issue
6
Date Issued
2021
Author(s)
Abstract
This study proposed a systematic approach to evaluating the environmental-economic benefits of multiple air pollution control, CO2 mineralization, and municipal solid waste incineration (MSWI) fly ash stabilization-utilization with high-gravity (HiGee) technology. MSWI fly ash due to its high alkalinity and calcium-rich compositions could be used to absorb acid gas pollutants and mineralize CO2 simultaneously. HiGee system can be deployed to eliminate the mass-transfer limit to accelerate the reaction kinetics. Technical-economic analysis (TEA) and life cycle analysis (LCA) were integrated with the technique to order preference by similarity to ideal solution (TOPSIS) approach and comprehensively evaluate the prioritized alternatives. Compared to existing wet-scrubber and fly ash landfill, the combination of fly ash slurry and further utilization of cementitious material can generate additional profits of direct/indirect carbon credit, calcium carbonate byproduct, reduction of air pollution fees and fly ash utilization revenue. In terms of environmental benefits, the installed HiGee system can reduce water and energy consumption to avoid water depletion and greenhouse gas emissions. TOPSIS results prioritized the various alternatives of HiGee operation modes and provided a technological evaluation for substituting the existing scrubber in an MSWI plant. ? 2021
Subjects
CO2 mineralization
flue gas cleaning
high-gravity rotating packed bed
life-cycle assessment
technical-economic analysis
wastes reclamation
Air pollution
Air purification
Calcium carbonate
Carbon dioxide
Economic analysis
Economic and social effects
Energy utilization
Environmental technology
Flue gases
Fly ash
Gas emissions
Greenhouse gases
Mass transfer
Mineralogy
Municipal solid waste
Packed beds
Reaction kinetics
Scrubbers
Waste incineration
Economic benefits
Environmental economics
Flue gas cleaning
High-gravity
High-gravity rotating packed bed
Mineralisation
Municipal solid wastes incineration fly ash
Rotating packed bed
Technical-economic analysis
Life cycle
Type
journal article