Volume 03: Proceedings of 11th International Conference on Applied Energy, Part 2, Sweden, 2019

Integrated Energy System for the Production and Use of Renewable Methanol via Alkaline Electrolysis and Solid Oxide Fuel Cells Francesco Lonis , Vittorio Tola, Giorgio Cau


The conversion of renewable hydrogen and recycled CO2 to valuable fuels in power-to-liquids (PtL) systems could help mitigate the negative effects of CO2 emissions. Within this context, methanol is a promising candidate, both as an energy carrier and a chemical feedstock. This paper is focused on renewable methanol production and its use in a PtL integrated system based on alkaline water electrolysis, high temperature solid oxide fuel cells, a thermal energy storage system and an organic Rankine cycle (ORC) engine. Detailed models of the main subsystems were developed and implemented by using Aspen Plus software. A comprehensive analysis via mass and energy balances was carried out to evaluate performance indexes of each section and of the overall plant for two different configurations: with and without the ORC engine

Keywords alkaline electrolysis, methanol, CO2 hydrogenation, energy storage, power-to-liquids, decarbonisation

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