Investigation of the performance of a copper based oxygen carrier for chemical looping combustion in a 120 kW pilot plant for gaseous fuels

Copper-based oxygen carriers supported with alumina/lime for the chemical looping conversion of gaseous fuels

“…The conversion of Cu25Al75 oxygen carrier to Cu was greater in extent in comparison to Cu25Ca75 (approximately 50%). The conversion of CH 4 is not complete but comparable to the conversion exhibited by highly engineered oxygen carriers described in previous literature [23] . Similarly to the reduction with CO, Cu25Al75 shows a decrease in its performance for reducibility and methane conversion with accumulating redox cycles.…”

Unsteady three-dimensional theoretical model and numerical simulation of a 120-kW chemical looping combustion pilot plant

“…The global solid mass flow was derived from the mass and energy balances, especially the oxygen balance, with the aid of OC samples taken from ULS and LLS, and allowed the determination of the oxidation state of OC leaving AR and FR. A detailed description of the solid sampling, and determinat ion of the solid circulation rate and the evaluation process are given else where (Kolbitsch et al, 2009b;Penthor et al, 2015). Results from the numerical simulation confirm the operating regime of the two reactors, that is, AR behaves as a circulating fluidized bed and FR as a bubbling fluidized bed, as expected.…”

Multi-scale simulation of chemical looping combustion in dual circulating fluidized bed

“…Meanwhile, the staged fluidization of the air reactor controls the global circulation rate of the system [16]. Penthor et al [17] presented the CLC performance in the DCFB system using a copper based oxygen carrier and revealed that the solids inventory and circulation were critical parameters for the fuel conversion. The impact of internal installation on the particles residence time was evaluated [18].…”