Evaluation of postcombustion CO<sub>2 </sub>capture by a solid sorbent with process modeling sing experimental CO<sub>2</sub> and H<sub>2</sub>O adsorption characteristics

Journal article (2018)

Authors

Jan Wilco Dijkstra ECN, Petten
Stéphane Walspurger ECN, Petten
Gerard D. Elzinga ECN, Petten
Jurriaan Boon ECN, Petten
W.G. Haije Large Scale Energy Storage - Mechanical, Maritime and Materials Engineering
Research Group
Large Scale Energy Storage (Mechanical, Maritime and Materials Engineering) (TU Delft)
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Published Date

2018

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Large Scale Energy Storage

Abstract

A combined experimental and modeling study was performed to evaluate the relation between sorbent characteristics and process performance for solid sorption postcombustion CO 2 capture. A pulverized coal (PC) and a natural gas combined cycle (NGCC) power plant were considered, addressing CO 2 and H 2 O sorption. The measured isotherms for PEI/silica sorbent were implemented in an equilibrium-based flow sheeting model. The PC regeneration heat demand is 3.9 GJ/ton CO 2 captured. This is lower than that of the NGCC and, though a direct comparison is not valid, similar to a literature MEA case. Solid sorption systems hold the promise to be energetically superior to MEA: a 2-fold increase in CO 2 adsorption capacity (to 4.4 mmol/g) yields a regeneration heat demand of 3.3 GJ/ton, even when accompanied by a similar increase in H 2 O adsorption capacity.