A Novel CO₂ Capture Process from Flue Gas with Recycling of Graphite Using Sodium—Conceptualization of the Process and Fundamental Process Description

Basu, Aninda; De, Sudipta

A Novel CO₂ Capture Process from Flue Gas with Recycling of Graphite Using Sodium—Conceptualization of the Process and Fundamental Process Description

2014

Basu, Aninda | De, Sudipta

Anthropogenic CO₂ emission is identified as the major cause of climate change. The use of fossil fuels has to be accommodated, possibly with a CO₂ capture process. Sequestration of captured CO₂ at high pressure is proposed as a feasible option for future mitigation of climate change, though using fossil fuels. However, this needs significant energy input and carries the potential threat of a possible future catastrophe. Capture of CO₂ with possible recycling is a long-term sustainable option. In this paper, a process involving a chain of reactions using solid sodium to capture both CO₂ and SO₂ from a flue gas is described. A significantly detailed description of both chemical reactions and physical processes is discussed. Recycling of captured CO₂ and SO₂ in the form of solid graphite and elemental sulphur (as the by-products) is the special feature of this process. However, critical selection of intermediate process liquids and equipment in this process needs further study for real-life implementation of this scheme.

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