(397g) Techno-Economic Feasibility Analysis of Liquid Metal-Based Methane Pyrolysis Process | AIChE

(397g) Techno-Economic Feasibility Analysis of Liquid Metal-Based Methane Pyrolysis Process


Kim, S. - Presenter, Hankyong National University
Lim, Y. I., Hankyong National University
Lee, U. D., Korea Institute of Industrial Technology (KITECH)
KIM, S. W., Korea National University of Transportation
Kang, Y. B., Pohang University of Science and Technology
Efforts are being made to move forward from fossil fuels to renewable energy, coping with climate change. Hydrogen produced from renewable energy can be used without generating greenhouse gases. Hydrogen is produced by steam methane reforming (SMR), oil/naphtha reforming, coal gasification, water electrolysis, and methane pyrolysis. Non-oxidative methane pyrolysis is a CO2-free H2 production technology that produces solid carbon instead of CO2. The reaction of methane decomposition is an endothermic high-temperature process that requires heat. The heat is generally supplied using coal, natural gas, and solar heat. Molten-metal (MM) based CH4 pyrolysis has advantages over solid catalytic reactors because catalyst deactivation by coke is prevented. The downstream processing of MM-based CH4 pyrolysis is simpler than SMR because H2 and solid carbon are produced.

In this study, process modeling for MM-based methane pyrolysis with different heating sources and carbon separation were presented to evaluate the energy, CO2 emissions, and economics. Economic indicators such as total capital investment (TCI), total production cost (TPC), return on investment (ROI), and payback period (PBP) were also assessed.