scholarly journals Hydrogen Production from Ethanol Reforming by a Microwave Discharge Using Air as a Working Gas

ACS Omega ◽  
2021 ◽  
Author(s):  
Wei Guo ◽  
XianFeng Zheng ◽  
ZhengBo Qin ◽  
QiJia Guo ◽  
Lei Liu
Keyword(s):  
Hydrogen Production ◽  
Microwave Discharge ◽  
Ethanol Reforming

Micro Channel Structure With Strengthened Rough Surface in an Ethanol Reforming Hydrogen Generator

2007 ◽  
Author(s):  
Dashi Su ◽  
Yong Tang ◽  
Mingqiang Pan
Keyword(s):  
Hydrogen Production ◽  
Rough Surface ◽  
Production Efficiency ◽  
Fixed Bed ◽  
Channel Structure ◽  
Microchannel Reactor ◽  
Energy And Environment ◽  
Ethanol Reforming ◽  
Environment Problem ◽  
Steam Reforming Of Ethanol

The combination of the hydrogen production from ethanol and microchannel technology can provide a portable hydrogen resource for fuel cell, which will effectively solve the energy and environment problem. This paper introduces a new surface structure — microchannel structure with strengthened rough surface (MCSWSRS) which has a feature of strongly transferring heat in microchannel. The MCSWSRS depends not only the dimension effect of this structure but also the special rough surface to strengthen heat transmission, so MCSWSRS transfers more heat than the smooth structure. Based on the heat strengthening transmission mechanism of MCSWSRS and the microchannel theory, a new kind of microchannel reactor was built and its heat strengthening transmission property has been analyzed. When the reacting temperature of microchannel reactor was 330°C and catalyst was Ni/La2O3, properties of MCSWSRS were experimented in the system of hydrogen from steam reforming of ethanol. The experimentation shows that hydrogen production efficiency of this microchannel reactor with MCSWSRS was 9% higher than that of the fixed bed tube reactor under the same reacting conditions. The results show that the MCSWSRS in reactor is feasible and advantageous in practice.

Numerical Simulation of an Axisymmetric Ethanol Reforming Reactor for Hydrogen Fuel Cell Applications

2006 ◽  
Author(s):  
Gregory A. Buck ◽  
Hiroyuki Obara
Keyword(s):  
Fuel Cell ◽  
Hydrogen Production ◽  
Autothermal Reforming ◽  
Great Promise ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
Gaseous State ◽  
Ethanol Reforming ◽  
Wide Range ◽  
Production Of Hydrogen

Hydrogen fuel cell technology is currently capable of providing adequate power for a wide range of stationary and mobile applications. Nonetheless, the sustainability of this technology rests upon the production of hydrogen from renewable resources. Among the techniques under current study, the chemical reforming of alcohols and other bio-hydrocarbon fuels, appears to offer great promise. In the so called autothermal reforming process, a suitable combination of total and partial oxidation supports hydrogen production from ethanol with no external addition of energy required. Furthermore, the autothermal reforming process conducted in a well insulated reactor, produces temperatures that promote additional hydrogen production through the endothermic steam reforming and the water-gas shift reactions, which may be catalyzed or uncatalyzed, with the added benefit of lowered carbon monoxide concentrations. In this study, an adiabatic ethanol reforming reactor was simulated assuming the reactants to be air (21% O2 and 79% N2) and ethanol (C2H5OH) and the products to be H2O, CO2, CO and H2, with all constituents taken to be in the gaseous state. The air was introduced uniformly through a ring around the side of the reactor and the gaseous ethanol was injected into the center of one end, with products withdrawn from the center of the opposite end, to create an axisymmetric flow field. The gas flows within the reactor were assumed to be turbulent, and the chemical kinetics of a simple four reaction system was assumed to be controlled by turbulent mixing processes. Air and fuel flow rates into the reactor were varied to obtain six different levels of oxidation (air-fuel ratios) while maintaining the same total gaseous mass flow out of the reactor. The numerical results for the reacting flow show that hydrogen production is maximized when the air-fuel ratio on a mass basis is held at approximately 2.8. These findings are in qualitative agreement with observations from previous experimental studies.

Hydrogen production by oxidative ethanol reforming on Co, Ni and Cu ex-hydrotalcite catalysts

2011 ◽  
Vol 36 (2) ◽  
pp. 1512-1523 ◽  
Author(s):  
R. Guil-López ◽  
R.M. Navarro ◽  
M.A. Peña ◽  
J.L.G. Fierro
Keyword(s):  
Hydrogen Production ◽  
Ethanol Reforming

Thermodynamic analysis of ethanol reforming for hydrogen production

Energy ◽  
2012 ◽  
Vol 44 (1) ◽  
pp. 911-924 ◽  
Author(s):  
Shaohui Sun ◽  
Wei Yan ◽  
Peiqin Sun ◽  
Junwu Chen
Keyword(s):  
Hydrogen Production ◽  
Thermodynamic Analysis ◽  
Ethanol Reforming
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