470075 Carbon Dioxide (CO2) Capture and Utilization Pathways – Assessing the Synergies Between Biological Use and Geological Sequestration of CO2

Thursday, November 17, 2016: 5:15 PM
Lombard (Hilton San Francisco Union Square)
Sudhanya Banerjee, Department of Bioproducts and Biosystems Engineering, University of Minnesota - Twin Cities, St.Paul, MN and Shri Ramaswamy, Bioproducts and Biosystems Engineering, University of Minnesota, St Paul, MN

As an important greenhouse gas (GHG), the emission of CO2 to the atmosphere needs to be reduced in order to mitigate climate change. Designing of proper of CO2 utilization pathways are imperative to reduce GHG emission. There are several ways to restrict CO2 emission into the atmosphere. Two such promising technologies include geological sequestration of CO2 in depleted oil and gas fields, saline aquifers and others, and biological sequestration of CO2 via microalgae. The primary focus of the present study is to assess the integration potential of CO2 geological sequestration and CO2 biological sequestration via growth, harvest and conversion of microalgae to value-added bioproducts. Different ways of microalgae conversion, including lipid extraction, utilization of the spent algal biomass as well as hydrothermal liquefaction of the whole microalgal biomass, are considered for the production of value-added products. The present study aims to quantify the techno-economic tradeoffs and optimize the entire supply-chain of CO2 utilization to ensure the most economically feasible alternative of CO2 usage. A multi-scale supply chain optimization framework is considered which takes into account CO2 capture, compression, pipeline transport and geologic storage as well as different processing pathways of microalgae. The state of Texas in USA is considered as the case study to evaluate the optimal design of CO2 capture, storage and/or utilization pathways. The present study will help inform decision and policy makers the optimal pathway of CO2 storage and utilization procedures for a particular location.

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See more of this Session: Separation Processes in Biorefineries
See more of this Group/Topical: 2016 International Congress on Energy