Chemical Looping Reforming (CLR) System for H2 Production—A Review

Abstract

Nowadays, world’s rising energy demand is satisfied by coal and petroleum based non-renewable fuels. But these fuels have some major drawbacks that these processes generate harmful oxidise like CO2, NOx. Out of these CO2 affects climate change of the whole world by producing global warming effect. Hydrogen can be use alternative to these energy sources due to its high energy generation per unit mass and low environmental impact compare to other fossil fuels. But the H2 is very less in nature. The steam reforming of methane is wildly used to harvest hydrogen from different fuels. It also produces CO2 and NOx. And the process cost of separating these gases from flue gases is consuming very high energy. The alternative to this technology is chemical looping reforming, that doesn’t produce NOx and CO2 can be easily separate. In this work authors try to compare different types of oxygen carriers used in many literatures by investigating their reactivity, crushing strength, and stability at different temperature. Also authors try to find most capable oxygen carrier (OC) for this system by considering OCs stability at higher temperatures and reactivity.