The Syngas Chemical Looping (SCL) process converts gaseous fuels such as syngas and hydrocarbons into hydrogen while capturing 100% of the CO₂ generated. The SCL process simplifies the overall fuel conversion scheme while reducing pollutants in an indirect but highly effective manner. This is achieved via a specially tailored Fe₂O₃ based composite particle. As a result, hydrogen production cost is substantially reduced. Extensive demonstrations of the SCL process have been carried out under a bench scale (2.5 KWt) unit using coal-derived syngas, natural gas, and other light hydrocarbons as feedstock. Hydrogen with an average purity higher than 99.95% was produced.

In this paper, the SCL process demonstrations are discussed. ASPENŽ simulation based on the bench scale demonstration results was used to analyze the SCL process. Process economics for the SCL process is also presented.