Carbon Capture Utilization and Storage in Methanol Production Using a Dry Reforming-Based Chemical Looping Technology.

This further investigates the concept of gas switching dry reforming (GSDR) that efficiently converts the two major greenhouse gases (CO and CH) into a valuable product (syngas) for gas-to-liquid (GTL) syntheses. The proposed GSDR is based on chemical looping technology but avoids external circulation of solids (metal oxides) by alternating the supply of reducing and oxidizing gas into a single fluidized bed reactor to achieve redox cycles. Each cycle consists of three steps where a metal oxide/catalyst is first reduced using GTL off-gases to produce CO (and steam) that is supplied to the next reforming step to produce syngas for GTL processes.

Combined Syngas and Hydrogen Production using Gas Switching Technology.

This paper focuses on the experimental demonstration of a three-stage GST (gas switching technology) process (fuel, steam/CO, and air stages) for syngas production from methane in the fuel stage and H/CO production in the steam/CO stage using a lanthanum-based oxygen carrier (LaSrFeAlO). Experiments were performed at temperatures between 750-950 °C and pressures up to 5 bar. The results show that the oxygen carrier exhibits high selectivity to oxidizing methane to syngas at the fuel stage with improved process performance with increasing temperature although carbon deposition could not be avoided.