Synthesis gas production with simultaneous CO₂ capturing and consuming: Application of chemical looping combustion by employing Fe45‐Al₂O₃ and Mn40/Mg–ZrO₂ oxygen carriers

Abstract

In this study, thermal coupling of chemical looping combustion (CLC) and dry reforming of methane (DR) via employment of Fe45-Al 2 O 3 and Mn40/Mg-ZrO 2 oxygen carriers (OCs) were investigated. The main aim of this configuration (CLC-DR) is the prevention of large CO 2 emissions to the atmosphere by CLC and simultaneous consumption of the captured gas to synthesis gas through a DR reaction. For this purpose, a steady state one-dimensional heterogeneous catalytic reaction model is applied to analyze the performance and applicability of the proposed CLC-DR configuration using both OCs. Simulation results indicate that for both OCs, combustion efficiency reaches 1 in the fuel reactor (FR) of CLC-DR. Additionally, results illustrate that CH 4 conversion in the DR side of CLC-DR reaches 0.7235 and 0.7213 with Fe45-Al 2 O 3 and Mn40/Mg-ZrO 2 OCs respectively.Results show that application of CLC-DR employing Fe45-Al 2 O 3 and Mn40/Mg-ZrO 2 OCs produces 8611 and 8585 kmol h À1 of synthesis gas, respectively. Synthesis gases with H 2 /CO mole ratios of 0.9519 and 0.9612 are achieved using Fe45-Al 2 O 3 and Mn40/Mg-ZrO 2 OCs respectively. In addition, results demonstrate that by increasing the feed temperature of CLC-DR from 800 to 1000 K, synthesis gas production reaches 11 210 and 11 340 kmol h À1 when using Fe45-Al 2 O 3 and Mn40/Mg-ZrO 2 , respectively.Finally, thermal and molar behaviours of CLC-DR configuration indicate that it is applicable, and by utilization of this configuration 547.8 tonne day À1 can be captured and converted to synthesis gas.

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“…One of the most challenging issues of the present communities is the growing emission of the greenhouse gases including CO 2 as a chief supplier and the resulting global warming. , In today’s world, the concentration of CO 2 in the atmosphere has raised by 140% in comparison with the preindustrial era, due to the industrial growth and technological advances. Conveyance vehicles, heat production facilities, and power plant allocate 67% of the worldwide CO 2 releases .…”

La‐hexaaluminate for synthesis gas generation by Chemical Looping Partial Oxidation of Methane Using CO2 as Sole Oxidant

“…Recently, the chemical looping process using CO 2 as the oxidant has become highly attractive due to the serious global environmental problems caused by large CO 2 emissions . In 2011, Najera et al extended chemical looping combustion (CLC) and proposed chemical looping dry reforming (CLDR, Figure a) by replacing air with CO 2 as the oxidant.…”

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