Kenneth Karl Mikael Möllersten is a Swedish researcher. He holds a PhD in chemical engineering and an MSc in mechanical engineering, from the Royal Institute of Technology, Stockholm, Sweden and completed his postdoctoral training at the International Institute for Applied Systems Analysis, Vienna. Möllersten is a researcher at IVL Swedish Environmental Research Institute and adjunct professor at KTH.
Möllersten made significant contributions to the early conceptualisation of the Bio-energy with carbon capture and storage technology and the evolution of the abstract idea of negative emissions. His work contributed to the early framing of carbon dioxide removal as a means to achieve globally net-negative carbon dioxide emissions as part of a climate risk management strategy, suggested the potential for including negative emissions as part of an emissions trading scheme, a proposal in 2004 to use CDR to bring back atmospheric CO₂ to pre-industrial levels, and several of the earliest studies that model the integration of BECCS in global greenhouse gas mitigation scenarios.