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

• Published in: Water, air, and soil pollution Vol. 225; no. 8; p. 1
• Main Authors: Basu, Aninda, De, Sudipta
• Format: Journal Article
• Language: English
• Published: Cham Springer-Verlag 01.08.2014; Springer International Publishing; Springer Nature B.V
• Subjects: Air pollution; Anthropogenic factors; Atmospheric Protection/Air Quality Control/Air Pollution; Bioremediation; byproducts; Carbon; Carbon dioxide; Carbon dioxide emissions; Carbon dioxide removal; Carbon sequestration; Chemical reactions; Climate change; Climate change mitigation; Climate Change/Climate Change Impacts; Coal; Earth and Environmental Science; Efficiency; Electricity generation; energy; Energy resources; Environment; Environmental monitoring; Feasibility studies; Flue gas; Fossil fuels; Gases; graphene; Graphite; High pressure; Hydrogeology; Industrial plant emissions; Mechanical engineering; Power plants; Recycling; Sodium; Soil Science & Conservation; Studies; Sulfur; Sulfur dioxide; Water Quality/Water Pollution; India; Recycling graphite and sulphur; Solid separation; Batch process; capture; CO; SO; Sodium bed; Down’s cell
• ISSN: 0049-6979; 1573-2932
• DOI: 10.1007/s11270-014-2047-1

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.