Electrification of Chemical Industry: a Case Study on Methanol Production

Electrifying chemical processes emerge as a vital strategy for reducing the industrial carbon footprint by harnessing renewable energy sources. This study examines the electrification of methanol production from natural gas, focusing on replacing conventional heating utilities with electrically heated furnaces and incorporating hydrogen produced via water electrolysis. A techno-economic analysis reveals that electrically heated methane reformers and steam boilers become cost-effective when electricity prices fall below ¢11.0 per kilowatt-hour, keeping the levelized cost of methanol (LCOM) within market ranges. However, full electrification of the industry is constrained by the current grid capacity, necessitating infrastructure upgrades to meet the increased demand. Partial electrification leveraging hydrogen cofiring with natural gas fuel offers a practical solution, reducing emissions by over 35% for electricity with emission intensities below 100 kg CO2-equivalent per megawatt-hour. This approach maintains the LCOM competitiveness, particularly when hydrogen replaces up to 50% of natural gas fuel at the base electricity price considered in this study. A forward-looking scenario involving direct methane electrolysis for methanol production highlights the importance of Faradaic efficiency and current density, with competitiveness achievable under optimistic electricity prices.