Numerical investigation of syngas oxy-combustion inside a LSCF-6428 oxygen transport membrane reactor

Mohamed A. Habib, Shakirudeen A. Salaudeen, Medhat A. Nemitallah*, R. Ben-Mansour, Esmail M.A. Mokheimer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The present work provides an investigation of the oxy-fuel combustion of syngas (mixture of CO and H2) inside an OTR (oxygen transport reactor) of tubular shape and surrounded by air in an annulus. The syngas is generated from solar thermal reforming of methane. CFD (Computational fluid dynamics) calculations were performed using FLUENT 14.0 commercial code, where a series of UDFs (user defined functions) that enable the transfer of oxygen across the membrane were written in VC++, then compiled and hooked to FLUENT software. The models of oxygen permeation and reaction kinetics are validated against the available experimental data under similar oxy-combustion conditions. Simulations were performed considering non-reactive and reactive flow conditions. The results showed that the reactive flow results in increase in oxygen permeation flux of about four times the case of non-reactive flow. Oxy-combustion characteristics of synthetic gas in a medium of recirculated CO2 are investigated. Considering reactive flow conditions, the effects of inlet temperature, CO2 circulation, fuel composition and sweep gas flux on oxygen permeation and combustion temperature are studied. It was found that increase in inlet temperature, inlet fuel concentration, inlet hydrogen concentration and sweep flow rate result in high combustion temperature and improved oxygen permeation flux.

Original languageEnglish
Pages (from-to)654-665
Number of pages12
JournalEnergy
Volume96
DOIs
StatePublished - 1 Feb 2016

Bibliographical note

Publisher Copyright:
© 2015 Elsevier Ltd.

Keywords

  • Carbon capture
  • OTR (Oxygen transport reactor)
  • Oxy-combustion
  • Oxygen permeation
  • Synthetic gas

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Modeling and Simulation
  • Renewable Energy, Sustainability and the Environment
  • Building and Construction
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Pollution
  • Mechanical Engineering
  • General Energy
  • Management, Monitoring, Policy and Law
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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