Hydrogen production via steam reforming of methanol over Cu/(Ce,Gd)O2−x catalysts

Huang, Ta-Jen; Chen, Hsiao-Min

doi:10.1016/j.ijhydene.2010.03.082

Cited by 38 publications

(22 citation statements)

References 23 publications

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“…For example, at 300 C reaction temperature, methanol conversion increased from 39.6% for 5%Cu to 69.9% for 10%Cu to 89.5% for 15%Cu, but decreased to 77.7% when the Cu loading was increased to 20%. The observed optima in the performance of Cu-MCM-41 catalyst with respect to Cu loading can be attributed to competitive influence of two factors, namely, %Cu dispersion and overall specific surface area of the catalysts [11]. The Cu-SA cat and in turn the number of active sites increased with increase in Cu loading; however, it also led to the consistent decrease in the surface area of the catalyst as shown in Table 1.…”

Section: Catalyst Testing For Srmmentioning

confidence: 84%

“…Huang and Chen [11] doped ceria (CeO 2 ) in Cu/CeO 2 catalyst using gadolinia (Gd 2 O 3 ) to increase its oxygen ion conductivity for methanol steam reforming reaction. Depending on catalyst loading, the reforming product with CO content up to 1% and methanol conversion in the range of 30e49% were achieved at 240 C. Mierczynski et al [12] demonstrated that zinc and aluminium spinel (Zn x Al y O xþ1.5y ) as a support for Cu catalysts significantly influence its catalytic activity for SRM.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of stable Cu-MCM-41 nanocatalysts for H2 production with high selectivity via steam reforming of methanol

Deshmane

Abrokwah

Kuila

2015

International Journal of Hydrogen Energy

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Available online xxxKeywords: Steam reforming Cu-MCM-41 Metal loading One-pot synthesis Catalyst deactivation N 2 O chemisorption a b s t r a c t High surface area MCM-41 containing copper catalysts (with different loading from 5 to 20 wt%) were synthesized using one-pot procedure for steam reforming of methanol (SRM) studies. A variety of techniques including BET, XRD, TGA-DSC, TEM, EDX, ICP-OES, H 2 -TPR, N 2 O chemisorption and EPR were used to characterize the physical and chemical properties of catalysts. Structural characterization by means of XRD and BET revealed that %Cu loading has a strong influence on the ordered structure and the textural properties of the Cu-MCM-41 catalysts. The BET surface area of MCM-41 decreased from 1039 to 662 m 2 /g with increase in Cu loading from 0 to 15 wt% and then dropped to 314 m 2 /g with the loss of ordered structure at 20 wt% loading. The chemical composition analyses of catalysts using ICP-OES and EDX showed that the intended amount of copper was successfully retained in MCM-41 during one pot synthesis. Steam reforming of methanol for hydrogen production was carried out in a fixed bed reactor at atmospheric pressure in the temperature range of 200e350 C. The effect of %Cu loading, reaction temperature, CH 3 OH/H 2 O molar ratio, reactants space velocity, catalyst time on-stream on the catalytic activity and selectivity were investigated. The Cu-MCM-41 samples showed excellent catalytic performance for the SRM reactions. The best results were obtained with 15%Cu-MCM-41 which showed 89% methanol conversion, 100% H 2 selectivity and CO selectivity of 0.8% at 300 C and 2838 h À1 GHSV. However, methanol conversion decreased to about 77% when the loading of Cu was increased to 20 wt%. This can be attributed to more than 50% decrease in catalyst surface area leading to decrease in Cu-dispersion. The catalyst with 15 wt% loading showed strong resistance to deactivation and maintained consistent performance over a time onstream for 48 h, indicating that the use of high surface area MCM-41 support significantly enhanced the stability of Cu-based catalyst.ScienceDirect j o urn al h om epa ge: www.elsev ier.com/locate/he i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y x x x ( 2 0 1 5 ) 1 e1 4 http://dx.Please cite this article in press as: Deshmane VG, et al., Synthesis of stable Cu-MCM-41 nanocatalysts for H 2 production with high selectivity via steam reforming of methanol, International Journal of Hydrogen Energy (2015), http://dx.

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Section: Catalyst Testing For Srmmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Synthesis of stable Cu-MCM-41 nanocatalysts for H2 production with high selectivity via steam reforming of methanol

Deshmane

Abrokwah

Kuila

2015

International Journal of Hydrogen Energy

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“…However, using it alone had no catalytic effect on the reaction. Among the promoters that have been tested since the last decade for the purpose of research in reforming works were Ca [142], Mg [143,144], Gd [145], Nb [146], Zr [147] and La [148]. The research work on group II-doped catalysts on oxygenated hydrocarbons reforming is one of recent interest.…”

Section: Effect Of Promotersmentioning

confidence: 99%

Catalytic reforming of oxygenated hydrocarbons for the hydrogen production: an outlook

Azizan

Aqsha

Ameen

et al. 2020

Biomass Conv. Bioref.

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The catalytic steam reforming of oxygenated hydrocarbons has been holding an interest in scientific societies for the past two decades. The hydrogen production from steam reforming of glycerol, ethanol and other oxygenates such as ethylene glycol and propylene glycol are more suitable choice not just because it can be produced from renewable sources, but it also helps to decrease the transportation fuel price and making it more competitive. In addition, hydrogen itself is a green fuel for the transportation sector. The studies on the production of hydrogen from various reforming technologies revealed a remarkable impact on the environmental and socio-economic issues. Researchers became more focused on glycerol steam reforming (GSR), ethanol steam reforming (ESR) and other oxygenates to investigate the catalyst suitability, their kinetics and challenges for the sustainability of the oil and gas production. In the present work, the authors critically addressed the challenges and strategies for hydrogen production via GSR, ESR and other oxygenates reforming process. This review covers extensively thermodynamic parametric analysis, catalysts developments, kinetics and advancement in the operational process for glycerol, ethanol and few other oxygenates. This detailed investigation only highlights the steam reforming process (SRP) of these oxygenates at the laboratory experimental stage. It was found that from this review, there are many technical issues, which lead to economic challenges. The issues are yet to be addressed and thus, these particular applications require faster accelerations at the pilot scale, taking into the consideration of the current pandemic and economic issues, for a safer and greener environment. Graphical abstract

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“…In contrast to the widely studied and debated role of ZnO, which can be separated into a geometric (spacer function) and an electronic It is noted that also other oxides than Al 2 O 3 or ZrO 2 like for instance SiO 2 [84], and also carbon [85,86] [114] or Zr- [115] or Gd-doped [116] ceria was used as support for Cu-based MSR catalysts. ZnO [118].…”

Section: Ternary Cu/zno/x Catalysts (X = Al 2 O 3 Zro 2 )mentioning

confidence: 99%

Catalysis for Alternative Energy Generation

Guczi

Erdöhelyi

2012

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Hydrogen production via steam reforming of methanol over Cu/(Ce,Gd)O2−x catalysts

Cited by 38 publications

References 23 publications

Synthesis of stable Cu-MCM-41 nanocatalysts for H2 production with high selectivity via steam reforming of methanol

Synthesis of stable Cu-MCM-41 nanocatalysts for H2 production with high selectivity via steam reforming of methanol

Catalytic reforming of oxygenated hydrocarbons for the hydrogen production: an outlook

Catalysis for Alternative Energy Generation

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