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LCA for Manufacturing of Construction Materials using CO2 Mineral Carbonation Technology

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한국폐기물자원순환학회지 (Journal of Korea Society of Waste Management)
한국폐기물자원순환학회 (Korea Society Of Waste Management)
초록

This study assesses greenhouse gas evolution from construction-material manufacturing facilities and estimates the potential reduction of these gases via the future massive sequestration of carbon dioxide. The scope of the evaluation specifically targets the global-warming potential in terms of kg-CO2 equivalent/tonnage industrial waste. Life cycle assessment (LCA) is a method to quantitatively analyze the input and output of a specific material resource during its life cycle from raw-material acquisition to final disposal as well as its environmental effect(s). LCA comprises four steps: its objective and definition of the scope, the entire life-cycle analysis list, an evaluation of its effects, and life-cycle analysis. The annual inflow of petro-ash reaches 300,000 tons, and this material is transported via screw-driving systems. The composition of the petro-ash is 1.2% volatile compounds, 6.8% fixed carbon and 92% ash contents. A total of 38,181,891 Nm3/yr of carbon dioxide is sequestrated, which is equivalent to 75,000 tons per annum and 304.5 kg/ton of petro-ash waste, with 250 kg/ton of the latter sequestrated as calcium carbonate. The final analysis on the effect of one ton of petro ash in construction materials showed 27.6 kg-CO2 eq emission. According to the final LCA analysis, only 27.6 kg-CO2 eq/ton was emitted by the petro-ash that was used in construction materials if CO2 fixation during carbonate mineralization was considered, where -250 kg-CO2 eq/ton positively contributed to the LCA. In the future, commercial-scale process modification via the realization of continuous processes and the more efficient reduction of carbon dioxide is anticipated.

목차
Abstract
 I. 서 론
 II. 연구방법 및 대상
  1. 전과정 평가의 분석 방법
  2. 분석대상 시설의 처리공정 및 기초자료 분석
 III. 연구 결과 및 고찰
 IV. 결 론
 References
저자
  • 이소라(한국환경정책·평가연구원) | Sora Yi (Korea Environment Institute)
  • 최창식(고등기술연구원) | Changsik Choi (Institute for Advanced Engineering) Corresponding author
  • 조성수(고등기술연구원) | Sung-su Cho (Institute for Advanced Engineering)
  • 서민혜(고등기술연구원) | Min-hye Seo (Institute for Advanced Engineering)
  • 지규철(고등기술연구원) | Gyu-cheol Ji (Institute for Advanced Engineering)
  • 김인배(국립한경대학교) | In-bae Kim (Hankyong National University)
  • 최성만(국립한경대학교) | Seong-man Choi (Hankyong National University)
  • 장원석(한국지역난방공사) | Won Seok Chang (Korea District Heating Corporation)
  • 임성묵(한국지역난방공사) | Seong-mook Lim (Korea District Heating Corporation)