Experimental study on the hydrogen production of integrated methanol-steam reforming reactors for PEM fuel cells

Chein, Reiyu; Chen, Yen‐Cho; Lin, Yu‐Sheng; Chung, J. N.

doi:10.1016/j.ijthermalsci.2011.03.001

Cited by 43 publications

(14 citation statements)

References 41 publications

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“…Various hydrocarbons, such as methanol (Agrell, et al, 2002, Chein, et al, 2011, Vadlamudi and Palanki, 2011, Yoon, et al, 2008, ethanol (Khila, et al, 2013, Liguras, Kondarides and Verykios, 2003, Rabenstein and Hacker, 2008, gasoline (Kang, Bae, J. andBae, G., 2006, Wang, Murata andInaba, 2005), methane (Zhua, Zhanga andKing, 2001, Pinto, et al, 2011), and propane (Wanga, et al, 2010), have been studied as a reforming fuel in literatures. Methanol is supposed to be the most attractive fuel for a reformer for PEFC because it is low C/H ratio, low reforming temperature and commercially available (Saika, et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on a methanol auto-thermal reforming for compact reformer

Ohtani

Sakamoto

Wada

et al. 2016

Mechanical Engineering Journal

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Performance of self-sustaining methanol auto-thermal reforming (ATR) was investigated experimentally in order to elucidate a reforming reaction mechanism and a condition required for high purity H 2 production for compact reformer. The reformer consists of vaporizing and reforming sections in a single unit. The exothermic oxidation and endothermic steam reforming (STR) take place simultaneously in the reforming section. The reforming section is surrounded by the vaporizing section and then the heat for vaporization is supplied from the reforming section. Two types of exothermic oxidation reaction were investigated as the heat source for STR; one is a partial oxidation (POX) and the other is a total oxidation (TOX). CuO/ZnO/Al 2 O 3 catalyst and Pt/Al 2 O 3 catalyst were used for STR and POX, respectively. While, only CuO/ZnO/Al 2 O 3 catalyst was needed for TOX because TOX took place when fuel and oxygen were supplied to the CuO/ZnO/Al 2 O 3 catalyst. Experiments were investigated in the range of oxygen/carbon ratio (O/C ratio) 0.1-1.5, steam/carbon ratio (S/C ratio) 1.0-3.0 and N 2 mole ratio 79-50 % in oxidizer. The results showed that the H 2 formation reached maximum at around O/C=0.4 in both STR/POX and STR/TOX cases in the present study. When O/C ratio is decreased from 0.4, heat formation by the oxidation reactions decreases and is insufficient to reform residual CH 3 OH by STR. As a result, H 2 formation and the methanol conversion ratio decrease. When O/C ratio is increased from 0.4, the H 2 formation decreases, because methanol is consumed with the excess O 2 by TOX and CH 3 OH for STR decreases. After all, O/C=0.4 gives an appropriate balance of heat supply and methanol for H 2 production. These results elucidate that the reaction rate of oxidation reactions, POX and TOX, is much faster than that of STR. In other words, methanol is first consumed by the oxidation reaction and the residual methanol is used for STR. For S/C ratio, H 2 formation is decreased in the higher S/C ratio. N 2 mole ratio in oxidizer has few influence over the reforming gas. The chemical equilibrium calculations support the experimental results.

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Section: Introductionmentioning

confidence: 99%

Experimental study on a methanol auto-thermal reforming for compact reformer

Ohtani

Sakamoto

Wada

et al. 2016

Mechanical Engineering Journal

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“…In other configurations, solar heated molten salts are used as an external source of thermal energy, improving the sustainability and the thermal efficiency of the system: the necessary heat to maintain the chemical reaction is supplied and the carbon footprint is decreased [20,21]. The use of membranes allows to work at very low temperatures and pressures and to have higher conversions [7,22]. Infect, the methane steam reforming reaction for hydrogen production is limited by thermodynamic equilibrium: the reactions take place at high temperatures (>800 °C) to have high methane conversion and hydrogen yield.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of an Integrated Membrane Reactor for Methane Steam Reforming

Leonzio¹

2016

IJRET

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“…They also found that the outlet flow rate of hydrogen increases with higher inlet temperature; however, the reformer heat requirement increases for higher inlet temperature. Chein et al [13] presented a methanol steam reforming for hydrogen production. The reforming with CuO/ZnO/Al 2 O 3 catalysts and the methanol catalytic combustion with Pt catalyst were experimentally tested by them.…”

Section: Introductionmentioning

confidence: 99%