Mitsubishi Heavy Industries Engineering has concluded testing of its new proprietary solvent for capturing CO2 at the Technology Centre Mongstad (TCM) in Norway, one of the world’s largest carbon capture demonstration facilities that is recognised for its state-of-the-art equipment and specialised expertise. What MHI is calling outstanding test results complete MHIENG’s commercialisation of KS-21, a new amine-based solvent used in the Advanced KM CDR process developed by MHIENG in collaboration with The Kansai Electric Power Co. (KEPCO); it paves the way for the future expansion of MHIENG’s carbon capture, utilisation and storage (CCUS) business. 

The testing was carried out between early May and late August 2021 in Norway. The KS-21TM’s performance was tested to confirm a carbon capture rate of 95-98%, which is above the current industry standard (approximately 90%), from flue gas emitted by a gas turbine at TCM’s test facility. The results indicate ‘outstanding’ energy-saving performance, reduced operating costs and low amine emissions, which exceed both the amine-based solvent, Monoethanolamine (MEA), used in the chemical absorption process and MHI’s own existing solvent, KS-1. In addition, in testing conducted under modified operating conditions, the KS-21 solvent delivered an industry-leading carbon capture rate of 99.8% and demonstrated the successful recovery of CO2 from flue gas of lower concentration than the CO2 in the atmosphere. Identical tests were performed for flue gas emitted by a fluidised catalytic cracker at the Mongstad refinery located adjacent to TCM, and identical results were obtained.

“MHI Group is delighted with the test results achieved by our new solvent KS-21. The test results constitute a major milestone for MHIENG as we launch the commercialization of KS-21. We expect the KS-21 solvent to be a key factor in driving lower operating costs and further growth of CCUS technology worldwide to achieve decarbonized society,” said Kenji Terasawa, MHIENG president & CEO. 

MHIENG acquired data from the testing of KS-21 at TCM, such as degradation volumes during operation and handling, that could enable it to improve its KS-21 solvent further. In addition, amine emission data was obtained during the testing which will support the various regulatory approval processes and environmental assessments and open the way to the further expansion of MHIENG’s carbon capture technology. 

MHI Group is currently strengthening its energy transition business, and the development of a CO2 ecosystem is central to those initiatives.