Hot potassium carbonate explained

Hot potassium carbonate, HPC, is a method used to remove carbon dioxide from gas mixtures,^[1] in some contexts referred to as carbon scrubbing. The inorganic, basic compound potassium carbonate is mixed with a gas mixture and the liquid absorbs carbon dioxide through chemical processes.^[2] The technology is a form of chemical absorption,^[3] and was developed for natural gas sweetening (i.e., removal of acidic from raw natural gas). Currently it is also considered, among others, as a post-combustion capture process, in the contexts of carbon capture and storage and carbon capture and utilization. As a post-combustion CO₂ capture process, the technology is planned to be used on full scale on a heat plant in Stockholm from 2025.^[4]

Notes and References

1. Enhanced carbon dioxide removal by promoted hot potassium carbonate in a split-flow absorber. 7. 857–865. Chemical Engineering and Processing: Process Intensification. 43. 10.1016/S0255-2701(03)00106-5. July 2004. Rahimpour. M.R.. Kashkooli. A.Z..
2. Post-combustion Capture of CO2: Results from the Solvent Absorption Capture Plant at Hazelwood Power Station Using Potassium Carbonate Solvent. Kathryn A.. Mumford. Kathryn H.. Smith. Clare J.. Anderson. Shufeng. Shen. Wendy. Tao. Yohanes A.. Suryaputradinata. Abdul. Qader. Barry. Hooper. Renato A.. Innocenzi. Sandra E.. Kentish. Geoffrey W.. Stevens. 19 January 2012. Energy & Fuels. 26. 1. 138–146. ACS Publications. 10.1021/ef201192n.
3. Book: Reay. David. Process Intensification: Engineering for Efficiency, Sustainability and Flexibility. Ramshaw. Colin. Harvey. Adam. 2. Chapter 8 - Application Areas – Petrochemicals and Fine Chemicals. 2013. 259–321. 10.1016/B978-0-08-098304-2.00008-0. 9780080983042.
4. Web site: Teknik för att fånga in koldioxid testas i Stockholm. 29 April 2019. Dagens industri.