Chemically enhanced weathering of silicate minerals and industrial wastes for carbon capture and storage

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Ever increasing anthropogenic CO2 emission is one of the most urgent and difficult challenges faced by the global society. A wide range of carbon capture and storage technologies have been developed but the unprecedented scale of industrial CO2 emission limits the number of viable options. The acceleration pathways of mineral carbonation have been investigated to capture and fix CO2 into thermodynamically stable solid carbonates. In-situ carbon mineralization in geologic formations has been suggested to lower the long-term monitoring costs, whereas ex-situ mineral carbonation is particularly interesting since they can use both alkaline rocks and alkaline industrial wastes. Moreover, ex-situ carbonation allows the formation of value-added products and their use can further offset the greenhouse gas emissions. In this study, Mg- and Ca-bearing minerals and industrial wastes will be engineered and activated to effectively leach out alkaline metals and to form carbonates with controlled chemical and physical properties. The use of Mg- and Si-targeting ligands as well as chemical or PCO2 (partial pressure of CO2) swing and internal grinding will be investigated in terms of the extent of mineral dissolution and carbonation. A modified core-shell model will be developed to predict the transition from kinetically to mass transfer limited reaction regimes.

Lab: Lenfest Center for Sustainable Energy

Direct Supervisor: Alissa Park

Position Dates: 5/15/2018 - 8/31/2018

Hours per Week: 40

Paid Position: Yes

Credit: Yes

Qualifications: General chemistry, inorganic chemistry, analytical chemistry, thermodynamics

Eligibility: Freshman, Sophomore, Junior, Senior, Master's; SEAS only

Alissa Park, ap2622@columbia.edu, 1038 Mudd, 212-854-8989