Platinum-Loaded NaY Zeolite for Aqueous-Phase Reforming of Methanol and Ethanol to Hydrogen

Tang, Zhong; Monroe, Justin; Dong, Junhang; Nenoff, Tina M.; Weinkauf, Donald H.

doi:10.1021/ie801222f

Cited by 40 publications

(14 citation statements)

References 30 publications

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“…With an increase in the number of carbons, the by-reactions decreased and condensation of the alcohols became easier, which results in the reduction of hydrogen production and the promotion of the formation of CO 2 and hydrocarbon compounds. This theory is consistent with the results reported by Tang et al (2009) and Wen et al (2009). …”

Section: A Comparison Of Reaction Mechanisms For Different Types Of Asupporting

confidence: 94%

Progress in the aqueous-phase reforming of different biomass-derived alcohols for hydrogen production

Chen

et al. 2015

J. Zhejiang Univ. Sci. A

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Hydrogen as a clean, efficient, and sustainable energy has attracted considerable attention in recent years. Hydrogen production from aqueous-phase reforming (APR) of biomass-derived alcohols is preferable to other methods because of its wide renewable resource, mild reaction conditions, and low processing cost. In this paper, the progress in the APR process of different biomass-derived alcohols for H 2 production is reviewed, and the reaction mechanisms are briefly discussed for different catalysts. Pt-based catalysts exhibit high H 2 selectivity but low conversion of the alcohols. Ni-based catalysts exhibit high activity and conversion but low H 2 selectivity and yield.

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Section: A Comparison Of Reaction Mechanisms For Different Types Of Asupporting

confidence: 94%

Progress in the aqueous-phase reforming of different biomass-derived alcohols for hydrogen production

Chen

et al. 2015

J. Zhejiang Univ. Sci. A

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“…The Dumesic group reported APR of ethylene glycol, glycerol and sorbitol, which are biomassderived carbohydrates, to produce hydrogen and alkanes below 300°C (Davda et al, 2003;Shabaker et al, 2004a). As for ethanol, conversion above 90% could be achieved using Pt catalysts (Tang et al, 2009;Tokarev et al, 2010). It has also been reported that a significant deactivation is observed for a commercial Al 2 O 3 support catalyst within 72 h of APR (Roy et al, 2012).…”

Section: Introductionmentioning

confidence: 82%

CH<sub>4</sub> Production from Hydrothermal Gasification of Ethanol Using Carbon-supported Ni Catalysts

Nakagawa

Shibata

2019

J. Chem. Eng. Japan / JCEJ

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Carbon-supported Ni catalysts were prepared and used to convert an ethanol/water mixture to CH 4. When using 5 wt% ethanol, successful conversion to CH 4 and CO 2 was achieved at a temperature as low as 250°C. Marginal amounts of undesired by-products such as acetaldehyde were produced even at a low conversion of ethanol. The composition of the product gas was similar to that in the equilibrium state. The rate of ethanol conversion was independent of ethanol concentration, and the activation energy was assumed to be 105 kJ/mol. Our carbon-supported Ni catalysts were found to show high activity for ethanol conversion from the comparison with literature data. The energy balance shows that this process needs little thermal energy to convert the ethanol/water mixture when heat of the outlet stream of the reactor is recovered by heat exchange with the inlet stream since the reaction is a slightly exothermic reaction. CH 4 produced in the reactor can be puri ed by physical absorption of CO 2 in water; however, CH 4 can be also absorbed in the water at high operating pressure. CH 4 can be recovered at 94% when the operating pressure of the absorber is 3 MPa from equilibrium consideration.

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“…Ultra high purity helium (>99.999 pct, Marathon) was used as sweeping gas for the two-step chemisorption measurement. [30] In the H 2 chemisorption measurements, the amount of nanoparticle sample used was~300 mg, and the dwelling time at each partial pressure was 20 minutes, which was found to be sufficient for reaching equilibrium state.…”

Section: H 2 Chemisorption and Conductivity Measurementsmentioning

confidence: 99%

Proton-Conducting Nanocrystalline Ceramics for High-Temperature Hydrogen Sensing

Tang

Trontz

et al. 2014

Metallurgical and Materials Transactions E

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The proton-conductive doped ceramic materials, including SrCe 0.95 Tb 0.05 O 3Àd (SCTb), SrCe 0.8 Zr 0.1 Y 0.1 O 3Àd (SCZY), and SrZr 0.95 Y 0.05 O 3Àd (SZY), are synthesized in the forms of nanoparticles and nanocrystalline thin films on sapphire wafers and long-period grating (LPG) fibers. The H 2 chemisorption and electrical conductivity of the nanocrystalline SCTb, SCZY, and SZY materials are measured at high temperature with and without the presence of CO 2 gas. The resonant wavelength shifts (Dk R;H 2) of the SCTb, SCZY, and SZY thin-film coated LPGs in response to H 2 concentration changes are studied in gas mixtures relevant to coal gasification syngas to evaluate their potential for high-temperature H 2 detection. The results show that, at around 773.15 K (500°C), SCTb has the highest H 2 sensitivity but the most severe interferences from impurities such as CO 2 and H 2 S; SZY has the best chemical resistance to impurities but the lowest H 2 sensitivity; and SCZY exhibits high H 2 sensitivity with reasonable chemical resistance.

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Platinum-Loaded NaY Zeolite for Aqueous-Phase Reforming of Methanol and Ethanol to Hydrogen

Cited by 40 publications

References 30 publications

Progress in the aqueous-phase reforming of different biomass-derived alcohols for hydrogen production

Progress in the aqueous-phase reforming of different biomass-derived alcohols for hydrogen production

CH<sub>4</sub> Production from Hydrothermal Gasification of Ethanol Using Carbon-supported Ni Catalysts

Proton-Conducting Nanocrystalline Ceramics for High-Temperature Hydrogen Sensing

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