Optimization of hydrogen production with CO2 capture by autothermal chemical-looping reforming using different bioethanol purities

Optimization of hydrogen production with CO2 capture by autothermal chemical-looping reforming using different bioethanol purities

Type	Journal Article
Author	E. García-Díez
Author	F. García-Labiano
URL	http://www.sciencedirect.com/science/article/pii/S0306261916301945
Volume	169
Pages	491-498
Publication	Applied Energy
Date	May 1, 2016
Abstract	Autothermal Chemical-Looping Reforming (a-CLR) is a process which allows hydrogen production avoiding the environmental penalty of CO2 emission typically produced in other processes. The major advantage of this technology is that the heat needed for syngas production is generated by the process itself. The heat necessary for the endothermic reactions is supplied by a Ni-based oxygen-carrier (OC) circulating between two reactors: the air reactor (AR), where the OC is oxidized by air, and the fuel reactor (FR), where the fuel is converted to syngas. Researchers conducted work, mass and heat balances to determine the auto-thermal conditions that maximize H2 production, assuming the product gas to be in thermodynamic equilibrium. They considered three different types of bioethanol has been considered according to their ethanol purity; Dehydrated ethanol, hydrated ethanol, and diluted ethanol. They observed that the higher H2 production was obtained with the use of diluted ethanol. The surplus energy needed could be compensated by the energy save achieved during the purification of ethanol in the production process.