Journal
FUEL
Volume 266, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2020.117093
Keywords
Coke oven gas; Linz-Donawitz gas; Methanol; Process synthesis; Economic evaluation
Categories
Funding
- Next Generation Carbon Upcycling Project through National Research Foundation (NRF) - Ministry of Science and ICT, Republic of Korea [2017M1A2A2043137]
- Technology Innovation Program - Ministry of Trade, Industry & Energy (MOTIE), Republic of Korea [10067793]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10067793] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017M1A2A2043137] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study addresses the simulation and techno-economic analysis of novel methanol production processes by the combined feeding of hydrogen-rich coke oven gas (COG) and carbon-rich Linz-Donawitz gas (LDG). The optimal operating scheme and conditions to ensure the most favorable carbon and hydrogen balance of the proposed processes, maximized methanol production and polygeneration of methanol, power, and heat, were determined through a rigorous process simulation with a sequential quadratic programming optimization. A techno-economic analysis revealed that two combined-feeding processes show an improved technical and economic performance compared to the conventional methanol production process involving separated feeding of COG and LDG. The primary energy efficiency and minimum methanol selling price of the proposed processes were 51% and 60%, and 265 and 370 USD/ton, respectively, which were greatly improved compared to the base process. In addition, the CO2 emissions of the two processes (0.41 and 1.03 kg of CO2 per kW) imply that adjusting the optimal carbon and hydrogen balance is an important strategy to produce economically viable and environmentally clean methanol from residue gases of the steel industry.
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