Engineering-scale Demonstration of the Mixed-Salt Process (MSP) for CO2 Capture

8 Pages Posted: 21 Nov 2022

Multiple version iconThere are 2 versions of this paper

Date Written: November 18, 2022


The Mixed-Salt Process (MSP) developed at SRI International (SRI) is an advanced ammonia-based CO2 capture process that represents a step change in the solvent-based, post-combustion capture technology development progression. By using a mixture of selected salts, the capture system is designed to operate with reduction in (1) cooling and auxiliary electricity loads, (2) NH3 emission, (3) water usage, and (4) system footprint. The key advantage of the MSP regenerator design is to capture the latent heat within the regenerator before the CO2 stream exits the vessel, thus operating with a reduced reboiler duty. The MSP regenerator produces an almost dry CO2 stream (H2Ovap/CO2vap <0.2) at high pressure, reducing both operational and capital CO2 compression costs. The overall benefit of the MSP is a significant reduction in the cost of the CO2 capture. This paper presents the MSP technology background and the activities relating to the preparation for the upcoming engineering-scale demonstration at a coal-fired power plant field site, based on extensive testing at the lab and minipilot scale, process modeling, and techno-economic analysis.

Keywords: CO2 capture, ammonia, potassium carbonate, Mixed-Salt Process (MSP)

Suggested Citation

Perea, Elisabeth and Jayaweera, Indira and Jayaweera, Palitha, Engineering-scale Demonstration of the Mixed-Salt Process (MSP) for CO2 Capture (November 18, 2022). Proceedings of the 16th Greenhouse Gas Control Technologies Conference (GHGT-16) 23-24 Oct 2022, Available at SSRN: or

Elisabeth Perea (Contact Author)

SRI International ( email )

333 Ravenswood ave.
Menlo Park, CA 94025
United States

Indira Jayaweera

SRI International ( email )

333 Ravenswood Avenue
Menlo Park, CA 94025
United States

Palitha Jayaweera

SRI International

1100 Wilson Blvd Suite 2800
Arlington, VA 22209
United States

Do you have a job opening that you would like to promote on SSRN?

Paper statistics

Abstract Views
PlumX Metrics