Chemical looping with oxygen uncoupling: Design calculations and process engineering simulations using kinetic data

Jo Ann S. Lighty, Adel F. Sarofim, Asad H. Sahir, Edward Eyring, Gabor Konya

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Chemical Looping with Oxygen Uncoupling (CLOU) is a process which is being researched as a potential candidate for combustion of solid fuels facilitating effective CO2 capture. An engineering analysis has been developed using data from in-house experiments on copper oxide as an oxygen carrier and utilizing global coal char oxidation kinetics reported in literature. Insights from the experimental study of Lewis and Gilliland on carbon gasification with metal oxide along with the developed engineering analysis have been incorporated to develop scenarios to study the impact of the residence time of air and fuel reactors and the recirculation rate of oxygen carrier on the process. The analysis has been extended by employing an ASPEN PLUS simulation of stoichiometric reactor models to develop relevant material and energy balances in the formulated scenarios. In-house experiments for gathering the kinetic data on unsupported and supported copper oxide have been conducted using a Thermo-gravimetric analyzer (TGA). From these experiments conducted on CLOU, supported copper oxides have emerged as promising candidates and they are being explored further. The experimental data are currently being evaluated for kinetic parameters to be incorporated into the simulations. The results of the order-of magnitude engineering analysis based on gas-solid reaction kinetics, and global coal char oxidation kinetics are presented in this paper. Design aspects of importance in identifying suitable conversions for the fuel and air reactors have been investigated as well as the role and impact of oxygen carrier recirculation rate on the energy balance of the process.

Original languageEnglish
Title of host publication27th Annual International Pittsburgh Coal Conference 2010, PCC 2010
Pages446-456
Number of pages11
StatePublished - 2010
Event27th Annual International Pittsburgh Coal Conference 2010, PCC 2010 - Istanbul, Turkey
Duration: 11 Oct 2010 → …

Publication series

Name27th Annual International Pittsburgh Coal Conference 2010, PCC 2010
Volume1

Conference

Conference27th Annual International Pittsburgh Coal Conference 2010, PCC 2010
Country/TerritoryTurkey
CityIstanbul
Period11/10/10 → …

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