Investigation of integrated energy systems with carbon capturing and chemical looping units for hydrogen, methane and methanol production

Abstract

This study investigates three multigeneration systems designed for hydrogen generation through chemical looping, incorporating an amine-based carbon dioxide capture subsystem. These systems consist of a solar tower heating subsystem and a power generation unit to fulfill electrical and heating requirements. Additionally, steam methane reforming or electrolysis is employed in each system to enhance its efficiency. The uniqueness of these systems lies in their innovative designs and significant contributions to addressing the global challenge of rising greenhouse gas emissions. This research generates and stores valuable products like hydrogen, fresh water, and electricity, and also effectively stores and converts carbon dioxide emissions into useful energy sources such as methanol or methane. All the products are finally stored to be used in future applications. The exergy efficiencies of systems 1, 2, and 3 are 25%, 32%, and 35.6%, respectively, and their energy efficiencies are 27%, 48%, and 48.6%.