Chemical Looping Systems for Hydrogen Production and Their Implementation in Aspen Plus Software: A Review and Bibliometric Analysis

Hydrogen (H₂) production is a key strategy for reducing greenhouse gas emissions, providing a clean and efficient energy alternative. This review explores chemical looping combustion (CLC) for H₂ production, focusing on feedstocks, oxygen carriers (OCs), and process modeling in Aspen Plus®. A bibliometric analysis was conducted to support the review. Results indicate that methane (CH₄) outperforms biomass due to its higher efficiency and stable reaction behavior. Iron- and nickel-based oxides are the most effective OCs, with iron facilitating water splitting and nickel excelling in steam methane reforming (SMR) and chemical looping reforming (CLR). Enhancing OCs with support materials and sorbents improves system performance. Accurate simulations using Rgibbs and fluidized bed models are essential for optimizing the process. This study provides insights into improving H₂ production efficiency, contributing to advancements in clean energy technologies.