Techno-economic analysis of methanol production from joint feedstock of coke oven gas and basic oxygen furnace gas from steel-making
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- Title
- Techno-economic analysis of methanol production from joint feedstock of coke oven gas and basic oxygen furnace gas from steel-making
- Authors
- LEE, JEONG KEUN; LEE, IN BEUM; HAN, JEEHOON
- Date Issued
- 2019-07
- Publisher
- 한국공업화학회
- Abstract
- This paper presents a study of the techno-economic analysis of producing methanol (MeOH) from steel mill off-gases, especially coke oven gas and basic oxygen furnace gas. The mixed off-gases produce syngas with appropriate H2/CO ratio and are converted to MeOH. A detailed kinetic model over a commercial catalyst Cu/ZnO/Al2O3 is applied for MeOH synthesis reaction. Four process designs were analyzed; they are combinations of two syngas compositions and the presence or absence of an interim MeOH-separation unit. When production rate was 22.2–28.3 t MeOH h−1, the unreacted purged gas could be used to generate electricity or can be sold as a fuel. The energy efficiency was in the range of 54.6–55.9%, considering both MeOH and electricity as an energy output. A heat-exchanger network is designed to minimize energy usage in the process. We analyzed the proposed process techno-economically and calculated a minimum selling price. The best case gives $0.57 kg−1 which is slightly higher than the recent market price, although a sensitivity analysis suggests that the price can be decreased in some cases. This study can be a basis for further research on this process.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/98663
- DOI
- 10.1016/j.jiec.2019.02.019
- ISSN
- 1226-086X
- Article Type
- Article
- Citation
- Journal of Industrial and Engineering Chemistry, vol. 75, page. 77 - 85, 2019-07
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