Renewable Natural Gas from Carbonaceous Wastes via Phase Transition CO2/O2 Sorbent Enhanced Chemical Looping Gasification

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Led by NC State Professor Dr. Fanxing Li, this project aims to develop a significantly intensified, sorbent enhanced – chemical looping gasification (SE-CLG) process, which combines biomass gasification, air separation, and syngas conditioning and cleaning into a single circulating fluidized bed (CFB) gasifier to produce methanation ready syngas. The SE-CLG technology being developed has excellent potential to produce cost-competitive renewable natural gas (RNG) to serve the domestic market. During FY 2021-22, Dr. Li reported that KIETS support benefited his research efforts in rationalizing the optimization of mixed oxides in terms of their redox and catalytic properties, which enabled them to leverage external funding to explore related novel concepts for process intensification in chemical manufacturing.

For FY 2021-22, Dr. Li reported 8 published articles in leading peer-reviewed journals; one patent application filed to cover the mixed oxides given unique properties and extensive applications; 9 invited seminars and conference presentations; and 3 graduate students and one post doc directly involved in the research project. Also, Catalytic and Redox Solutions LLC (CatRedox), an NC State based start-up, was created and licensed technologies developed with KIETS support. CatRedox has continued to perform well, having leveraged $1.75 million R&D funding from both the government and private sectors. Further scale up and technology verification is underway. CatRedox is also in close contact with several large chemical and petrochemical companies for further technology development. KIETS support for this research is leveraged with support from the Department of Energy (DOE), NSF, and CatRedox.