Evaluation of Sorption Enhanced Reforming in Combination with Oxyfuel Combustion for the Sequestration of CO2

Abstract

Traditional dual fluid gasification enables a favorable product gas comprising hydrogen, carbon monoxide, carbon dioxide, and methane. This paper focus on Sorption Enhanced Reforming combined with Oxyfuel combustion, which constitutes an additional opportunity for CO2 sequestration. First experimental results in the test plants at TU Wien (100 kW) and at University Stuttgart (200 kW) have been implemented. Based on these results, the functionality of OxySER could be demonstrated and a concept for the commercial-scale use is developed. Furthermore, the profitability of OxySER, by application in a raw iron production plant for the generation of reduction gas, within a techno-economic assessment is investigated. The results of the techno-economic assessment show that the production of reduction gas via Sorption Enhanced Reforming in combination with Oxyfuel combustion can definitely compete with the natural gas route. The biggest potential to increase the profitability of the OxySER process offers the use of low-grade fuels like bark or sugarcane bagasse to decrease the fuel costs, which is the main cost driver.