Development and deployment of integrated air pollution control, CO2 capture and product utilization via a high-gravity process: comprehensive performance evaluation
Journal
Environmental Pollution
Journal Volume
252
Pages
1464-1475
Date Issued
2019
Author(s)
Abstract
In this study, a proposed integrated high-gravity technology for air pollution control, CO2 capture, and alkaline waste utilization was comprehensively evaluated from engineering, environmental, and economic perspectives. After high-gravity technology and coal fly ash (CFA) leaching processes were integrated, flue gas air emissions removal (e.g., sulfate dioxide (SO2), nitrogen oxides (NOx), total suspended particulates (TSP)) and CO2 capture were studied. The CFA, which contains calcium oxide and thus, had high alkalinity, was used as an absorbent in removing air pollution residues. To elucidate the availability of technology for pilot-scale high-gravity processes, the engineering performance, environmental impact, and economic cost were simultaneously investigated. The results indicated that the maximal CO2, SO2, NOx, and TSP removal efficiencies of 96.3 ± 2.1%, 99.4 ± 0.3%, 95.9 ± 2.1%, and 83.4 ± 2.6% were respectively achieved. Moreover, a 112 kWh/t-CO2 energy consumption for a high-gravity process was evaluated, with capture capacities of 510 kg CO2 and 0.468 kg NOx per day. In addition, the fresh, water-treated, acid-treated, and carbonated CFA was utilized as supplementary cementitious materials in the blended cement mortar. The workability, durability, and compressive strength of 5% carbonated CFA blended into cement mortar showed superior performance, i.e., 53 MPa ±2.5 MPa at 56 days. Furthermore, a higher engineering performance with a lower environmental impact and lower economic cost could potentially be evaluated to determine the best available operating condition of the high-gravity process for air pollution reduction, CO2 capture, and waste utilization. © 2019 Elsevier Ltd
SDGs
Other Subjects
Air pollution; Calcium oxide; Carbon dioxide; Carbonation; Cements; Compressive strength; Cost engineering; Costs; Economic and social effects; Energy utilization; Environmental technology; Fly ash; Gas emissions; Lime; Mortar; Nitrogen oxides; Nitrogen removal; Packed beds; Sulfur compounds; Water treatment; Accelerated carbonation; Comprehensive performance evaluation; Engineering performance; High-gravity technologies; Rotating packed bed; Supplementary cementitious material; Total suspended particulates; Triangle model; Air pollution control; absorbent; calcium oxide; carbon dioxide; cement; coal; nitrogen oxide; sulfur dioxide; calcium derivative; carbon dioxide; carbonic acid; coal; oxide; atmospheric pollution; carbon dioxide; carbon sequestration; cement (construction material); compressive strength; modeling; performance assessment; pollution control; air pollution control; alkalinity; Article; compressive strength; economic aspect; engineering; environmental factor; environmental impact; fly ash; gravity; integrated high gravity technology; leaching; recycling; suspended particulate matter; technology; waste component removal; air pollutant; air pollution; chemistry; ecosystem restoration; prevention and control; procedures; Air Pollutants; Air Pollution; Calcium Compounds; Carbon Dioxide; Carbonates; Coal; Coal Ash; Environmental Restoration and Remediation; Gravitation; Nitrogen Oxides; Oxides
Type
journal article