Short Review: Cu Catalyst for Autothermal Reforming Methanol for Hydrogen Production

2013

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This study addresses the catalytic performance of Cu/ZnO/Al2O3/Cr2O3 in low-temperature of autothermal reforming (ATR) reaction. Various operating conditions were used to decide the optimum reaction conditions: type of promoter (ZrO2, CeO2, and Cr2O3), precipitation temperature, precipitation pH, operation temperature, molar ratio of O2/CH3OH (O/C), and weight hourly space velocity (WHSV). The catalysts were prepared using the oxalic coprecipitation method. Characterization of the catalyst was conducted using a porosity analyzer, XRD, and SEM. The methanol conversion and volumetric percentage of hydrogen using the best catalyst (Cu/ZnO/Al2O3/Cr2O3) exceeded 93% and 43%, respectively. A catalyst prepared by precipitation at -5 o C and at pH of 1 converted methanol to 40% H2 and less than 3000 ppm CO at reaction temperature of 200 o C. The size and dispersion of copper and the degradation rate and turnover frequency of the catalyst was also calculated. Deactivation of the Cu catalyst at a reaction temperature of 200 o C occurred after 30 h.

“…The particle size increased in conjunction with the pH value. This phenomenon has been reported by Kawamura et al [7].…”

Section: Bulletin Of Chemical Reaction Engineering and Catalysis 8 (2)supporting

confidence: 79%

“…Methanol is a suitable liquid fuel for producing hydrogen because it has a high hydrogen-carbon ratio, is easy to handle, and has a reforming temperature [5][6][7]. Methanol reforming is an endothermic reaction that runs rapidly at temperature of 250-300 °C using copper-based catalysts [8].…”

Section: Introductionmentioning

confidence: 99%

Modification the Oxalic Co-precipitation Method on a Novel Catalyst Cu/Zn/Al2O3/Cr2O3 for Autothermal Reforming Reaction of Methanol

Kuo

2013

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“…Addition of Al2O3 improved the catalyst stability but the methanol conversion rate reduced considerably [45]. Addition of Al2O3 improved the catalyst stability but the methanol conversion rate reduced considerably [45].…”

Section: Coppermentioning

confidence: 99%

“…Moreover, the possession of both amphoteric and redox functions makes it appealing as a more suitable carrier for a number of catalytic applications [45]. Zirconium has recently emerged as a particularly interesting support material.…”

Section: Coppermentioning

confidence: 99%

Short Review: Mitigation of Current Environmental Concerns from Methanol Synthesis

Young

Dai

et al. 2013

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Methanol has become a widely used and globally distributed product. Methanol is very important due to the current depletion of fossil fuels. Industrially, methanol produced from the catalytic reaction of synthetic gas composed of hydrogen, carbon monoxide, and carbon dioxide. Methanol production has brought great attention due to carbon dioxide as the main source of greenhouse gas emissions. Combined of reducing CO2 emissions and supplying an alternative fuel source has created the idea of a carbon neutral cycle called “the methanol economy”. The best catalyst for the methanol economy would show a high CO2 conversion and high selectivity for methanol production. This paper investigates research focused on catalyst development for efficient methanol synthesis from hydrogenation of carbon dioxide through added various supports and additives such as silica, zirconium, and palladium. Catalysts that displayed the highest activity included a zirconia and silicon-titanium oxide promoted Cu/Zn/Al2O3 catalyst. Alternative method of catalyst preparation, include the oxalate-gel, solid-state reaction, co-precipitation and combustion method also investigated. © 2013 BCREC UNDIP. All rights reserve

“…Methanol is simply the easiest to convert H2 because its boiling point is low and it is safe to handle and store [1,2], and also because methanol is sulfur-free, and it can be activated at low temperatures (<300 °C) [3]. Methanol features a high hydrogen-carbon ratio and no C-C bonds, which minimizes the risk for coke formation.…”

Section: Introductionmentioning

confidence: 99%

Thermal Behavior and Hydrogen Production of Methanol Autothermal Reforming Performed Using Oxygen Enrichment and Cu/ZnO/Al2O3/Cr2O3/CeO2 Catalyst

2015

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A fixed-bed reactor designed for the autothermal reforming (ATR) of methanol under adiabatic conditions was constructed to experimentally determine the profile of temperature and catalyst activity generated using the Cu/ZnO/Al2O3/Cr2O3/CeO2 catalyst. The effect of oxygen enrichment in this experiment was investigated, and the experimental results showed that an increase in oxygen concentration correlated with an increase in the temperature of the catalytic bed; by contrast, this increase in oxygen concentration resulted in a reduction of the startup time of the catalyst. Moreover, the reaction temperature was determined to vary with the position within the catalytic fixed bed.