Efficient Production of Clean Power and Hydrogen Through Synergistic Integration of Chemical Looping Combustion and Reforming

Mohammed N. Khan, Schalk Cloete and Shahriar Amini
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Mohammed N. Khan: Department of Energy and Process Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
Schalk Cloete: Process Technology Department, SINTEF Industry, NO-7465 Trondheim, Norway
Shahriar Amini: Department of Energy and Process Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway

Energies, 2020, vol. 13, issue 13, 1-19

Abstract: Chemical looping combustion (CLC) technology generates power while capturing CO 2 inherently with no direct energy penalty. However, previous studies have shown significant energy penalties due to low turbine inlet temperature (TIT) relative to a standard natural gas combined cycle plant. The low TIT is limited by the oxygen carrier material used in the CLC process. Therefore, in the current study, an additional combustor is included downstream of the CLC air reactor to raise the TIT. The efficient production of clean hydrogen for firing the added combustor is key to the success of this strategy. Therefore, the highly efficient membrane-assisted chemical looping reforming (MA-CLR) technology was selected. Five different integrations between CLC and MA-CLR were investigated, capitalizing on the steam in the CLC fuel reactor outlet stream to achieve highly efficient reforming in MA-CLR. This integration reduced the energy penalty as low as 3.6%-points for power production only (case 2) and 1.9%-points for power and hydrogen co-production (case 4)—a large improvement over the 8%-point energy penalty typically imposed by post-combustion CO 2 capture or CLC without added firing.

Keywords: chemical looping combustion; CO 2 capture; hydrogen; power plant; energy penalty; natural gas combined cycle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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