A REVIEW OF PRE-COMBUSTION CO2 CAPTURE IN IGCC

G. Suresh Kumar, M. Viswanadham, A.V.S.S.K.S.Gupta, G. Santosh Kumar

Abstract: ntegrated Gasification Combined Cycle (IGCC) with Pre-combustion has many advantages over post and oxy-combustion systems. This is because the CO2 will be at higher pressure (requires smaller equipment) thereby making the separation process efficient and easy for sequestration. However the challenges remain to exploit this technology are; (i) it can only be applied for new plants since the separation process becomes integral part of combustion (results in higher down times), and existing plant cannot be retrofitted, (ii) the technology is not as mature as other counterparts and cannot be applied for large scale power production, (iii) higher energy penalty due to cooling of syngas for CO2 separation with conventional methods. These issues have led worldwide researchers to focus on overcoming the challenges and make the technology of future. From the research of past decade, it is evident that CO2separation by adsorbents is best choice. Due to inherent disadvantages of process such as limited operating temperatures, recovery and purity of CO2, recovery ®eneration energy penalty, much of research in focused on developing enhanced adsorbents and processes. In this paper we present different techniques and materials developed by researchers in the past decade and also present future scope for pre-combustion capture applied to IGCC.

Keywords: pre-combustion, post-combustion, oxy-combustion, adsorption, CO2 capture, IGCC

DOI: https://doi.org/10.15623/ijret.2013.0205020