Using palladium membranes for carbon capture in natural gas combined cycle (NGCC) power plants: process integration and techno-economics

Comparison of the efficiency of carbon dioxide capture by sorption-enhanced water–gas shift and palladium-based membranes for power and hydrogen production

“…In the current cases, a high-pressure counter-current sweep of nitrogen or steam is assumed, related to the final pressure at which the hydrogen needs to be produced. This is in line with a recent study by Atsonios et al (2015), who showed an increase in system efficiency with increasing sweep gas pressure, at the expense of a higher required membrane surface area. Sweep gas improves the driving force for permeation, but induces additional resistance to mass transfer, especially at higher pressures (Boon et al, 2012).…”

“…Therefore, metallic palladium and palladium alloy membranes have received a great deal of interest from researchers worldwide (Paglieri and Way, 2002;Basile et al, 2008;Yun and Oyama, 2011;Gallucci et al, 2013). Palladium based membranes are currently in use for the production of hydrogen in niche markets and their economic potential extends to chemical industry, pre-combustion carbon dioxide capture, and the production of ultrapure hydrogen (Paglieri and Way, 2002;Ockwig and Nenoff, 2007;Gazzani et al, 2014b;Atsonios et al, 2015;. The stability of palladium membranes in experiments of up to a year is discussed by Gallucci et al (2013).…”

“…above 200 • C. In contrast, separation of carbon dioxide and hydrogen at high temperatures is possible with high-temperature sorbents or palladium-based membranes. These have consequently attracted a sustained academic interest over the last years, particularly in the framework of pre-combustion carbon dioxide capture (Yong et al, 2002;Dijkstra et al, 2011;Boon et al, 2012;Gallucci et al, 2013;Gazzani et al, 2013aGazzani et al, ,b, 2015van Berkel et al, 2013;Wang et al, 2014;Atsonios et al, 2015;Jansen et al, 2015), aiming at the development of high-temperature technologies for the separation of carbon dioxide and hydrogen in general, and specifically for pre-combustion capture of carbon dioxide.…”

High-purity H2 production with CO2 capture based on coal gasification

“…An important difference between the IGCC case and the H2 production concept presented in this paper is that a higher HRF is targeted for IGCC (typically 90%). It can also be noted that for the natural-gas based IRCC, a HRF of 90-95% is analysed, and that two WGS reactors in series appears to be the optimum configuration [35].…”