Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 75, Issue -, Pages 77-85Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2019.02.019
Keywords
Methanol production; Steel-work off-gases; Kinetic model; Techno-economic analysis; Coke oven gas; Basic oxygen furnace gas
Funding
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2017R1A2B1008798]
- National Research Foundation of Korea (NRF) - Ministry of Education [2016R1D1A3B03934107]
- Engineering Development Research Center (EDRC) - Ministry of Trade, Industry and Energy (MOTIE) [N0000990]
- National Research Foundation of Korea [2016R1D1A3B03934107, 2017R1A2B1008798] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 H-2/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. (C) 2019 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry.
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