Hydrogen generation for fuel-cell power systems by high-pressure catalytic methanol-steam reforming

Peppley, Brant A.; Amphlett, J. C.; Kearns, Lyn M.; Mann, R. F.; Roberge, P.R.

doi:10.1109/iecec.1997.661876

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…Moreover, we showed in previous calculations [28] that full methanol conversion should not be a prerequisite in the system design. Even though the tendency for carbon formation increases with pressure, no increase in catalyst fouling was experimentally observed for pressures as high as 40 bar at steam-to-methanol ratios greater than unity [40].…”

Section: A Concept Of Ice With High-pressure Srmmentioning

confidence: 96%

Energy efficiency of a direct-injection internal combustion engine with high-pressure methanol steam reforming

Poran

Tartakovsky

2015

Energy

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Section: A Concept Of Ice With High-pressure Srmmentioning

confidence: 96%

Energy efficiency of a direct-injection internal combustion engine with high-pressure methanol steam reforming

Poran

Tartakovsky

2015

Energy

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“…The conversion rate and CO mole fraction would be different for different ratios of Cu, Zn, and Al and the methods to produce the commercial catalysts [19]. The catalyst that used in this study is Cu/ZnO/Al 2 O 3 , BASF K3-110, one of the most adopted commercial catalyst for steam reforming processes [18,20,21]. To solve the long-term durability issues, the chemical, thermal, and mechanical aspects of catalyst deactivations can be solved, respectively, when dealing with catalyst weight, pore size, process temperature optimization.…”

Section: Introductionmentioning

confidence: 99%

A Swiss-Roll-Type Methanol Mini-Steam Reformer for Hydrogen Generation with High Efficiency and Long-Term Durability

Tseng,

Chiu,

Huang

2023

Micromachines

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This paper proposes a Swiss-roll-type mini-reformer employing a copper–zinc catalyst for high-efficient SRM process. Although the commercially available copper–zinc catalysts commonly used in cylindrical-type reformers provide decent conversion rates in the short term, their long-term durability still requires improvement, mainly due to temperature variations in the reformer, catalyst loading, and thermal sintering issues. This Swiss-roll-shaped mini-reformer is designed to improve thermal energy preservation/temperature uniformity by using dual spiral channels to improve the long-term durability while maintaining methanol-reforming efficiency. It was fabricated on a copper plate that was 80 mm wide, 80 mm long, and 4 mm high with spiral channels that were 2 mm deep, 4 mm wide, and 350 mm long. To optimize the design and reformer operation, the catalyst porosity, gas hourly speed velocity (GHSV), operation temperature, and fuel feeding rate are investigated. Swiss-roll-type reformers may require higher driving pressures but can provide better thermal energy preservation and temperature uniformity, posing a higher conversion rate for the same amount of catalyst when compared with other geometries. By carefully adjusting the catalyst bed porosity, locations, and catalyst loading amount as well as other conditions, an optimized gas hourly space velocity (GHSV) can be obtained (14,580 mL/g·h) and lead to not only a high conversion rate (96%) and low carbon monoxide generation rate (0.98%) but also a better long-term durability (decay from 96% to 88.12% after 60 h operation time) for SRM processes. The decay rate, 0.13%/h, after 60 h of operation, is five-folds lower than that (0.67%/h, 0.134%/h) of a commercial cylindrical-type fixed-bed reactor with a commercial catalyst.

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“…The starting fuel could be either liquid or gas, such as gasoline or methane, respectively, but alcohols such as methanol are more preferrable because they can be considered as greener solutions [8,9]. After the steam reforming and the water gas shift reactions taking place, the final gas mixture consists of 45-75 vol.% H 2 , 15-25 vol.% CO 2 , 0.5-2 vol.% CO, N 2 and H 2 O [10,11].…”

Section: Introductionmentioning

confidence: 99%

Impact of Hydrothermally Prepared Support on the Catalytic Properties of CuCe Oxide for Preferential CO Oxidation Reaction

et al. 2022

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CuCe mixed oxide is one of the most studied catalytic systems for preferential CO oxidation (CO-PrOx) for the purification of hydrogen-rich gas stream. In this study, a series of ceria supports were prepared via a citrates-hydrothermal route by altering the synthesis parameters (concentration and temperature). The resulting supports were used for the preparation of CuCe mixed-oxide catalysts via wet impregnation. Various physicochemical techniques were utilized for the characterization of the resulting materials, whereas the CuCe oxide catalysts were assessed in CO-PrOx reaction. Through the proper modification of the hydrothermal parameters, CeO2 supports with tunable properties can be formed, thus targeting the formation of highly active and selective catalysts. The nature of the reduced copper species and the optimum content in oxygen vacancies seems to be the key factors behind the remarkable catalytic performance of a CO-PrOx reaction.

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Hydrogen generation for fuel-cell power systems by high-pressure catalytic methanol-steam reforming

Cited by 9 publications

References 7 publications

Energy efficiency of a direct-injection internal combustion engine with high-pressure methanol steam reforming

Energy efficiency of a direct-injection internal combustion engine with high-pressure methanol steam reforming

A Swiss-Roll-Type Methanol Mini-Steam Reformer for Hydrogen Generation with High Efficiency and Long-Term Durability

Impact of Hydrothermally Prepared Support on the Catalytic Properties of CuCe Oxide for Preferential CO Oxidation Reaction

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