Hydrogen production through methanol steam reforming: Effect of synthesis parameters on Ni–Cu/CaO–SiO 2 catalysts activity

Yang, Ren-Xuan; Chuang, Kui-Hao; Wey, Ming‐Yen

doi:10.1016/j.ijhydene.2014.09.140

Cited by 48 publications

(22 citation statements)

References 36 publications

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“…The results showed that while the addition of ZrO 2 significantly promoted the catalytic activity due to the improved Cu dispersion and reducibility, CeO 2 addition mainly suppressed the CO formation owing to its high oxygen storage capacity. The Cu/ZnO/ZrO 2 /CeO 2 catalyst showed the best SRM performance exhibiting 91% methanol conversion and 1.4% CO selectivity at 230 C. In another study, Pojanavaraphan et al [19] found that the promotion of Cu-based catalyst supported on mixed CeO 2 eZrO 2 using gold (AueCu/Ce 0.25 Zr 0.25 O 2 ) showed superior SRM activities with complete methanol conversion and~5% CO selectivity at 350 C. Yang et al [20] prepared the CaOeSiO 2 supported NieCu bimetallic catalysts using modified polyol method under Ar and (Ar þ H 2 ) atmosphere. The NieCu/CaOeSiO 2 prepared under Ar atmosphere and reduced at 160 C demonstrated the best catalytic performance for SRM (93.6% methanol conversion and H 2 yield of 5865 mmol/h-g cat), which was attributed to its high pore volume and mesoporosity leading to the effective dispersion of the metal particles.…”

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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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: 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, the nickel-based catalysts with poor nickel dispersion prepared by an impregnation method are not only unfavorable for efficient hydrogen production but also vulnerable to catalyst deactivation caused by sintering and carbon deposition. Therefore, many attempts such as co-precipitation [27], sol-gel processing [28,29], templating [30,31], and promoter addition [32][33][34] have been made to enhance catalytic activity and stability of the nickel-based catalysts in the steam reforming reaction by increasing nickel dispersion of the catalysts.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen production by steam reforming of liquefied natural gas (LNG) over mesoporous Ni/Al2O3 catalyst prepared by an EDTA-assisted impregnation method

Bang

Park

Han

et al. 2016

Applied Catalysis B: Environmental

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“…However, the 3DOM CaO/SiO 2 at 800°C was a nonordered structure due to high calcination temperature (Figure 1(d)). Increasing the calcination temperature may result in accumulation and sintering of Ca, resulting in bigger particles and decreasing in surface area [10,11]. e SEM images of the synthesized 3DOM CaO/Al 2 O 3 at 700 and 800°C were shown in Figures 2(a) and 2(b).…”

Section: Characterization Of the 3dom Materialsmentioning

confidence: 99%

Synthesis of Ca‐Doped Three‐Dimensionally Ordered Macroporous Catalysts for Transesterification

Chokpanyarat

Punsuvon

Achiwawanich

2018

Advances in Materials Science and Engineering

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e novel three-dimensionally ordered macroporous (3DOM) CaO/SiO 2 , 3DOM CaO/Al 2 O 3 , and 3DOM Ca 12 Al 14 O 32 Cl 2 catalysts for biodiesel transesterification were prepared by sol-gel method. e 3DOM catalysts were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). e hierarchical porous structure was achieved; however, only 3DOM CaO/Al 2 O 3 and 3DOM Ca 12 Al 14 O 32 Cl 2 catalysts were used for transesterification due to high amount of active CaO. Various parameters such as methanol to oil molar ratio, catalyst concentration, reaction time, and their influence on the biodiesel production were studied. e result showed that 99.0% RPO conversion was achieved using the 3DOM Ca 12 Al 14 O 33 Cl 2 as a catalyst under the optimal condition of 12 : 1 methanol to oil molar ratio and 6 wt.% catalyst with reaction time of 3 hours at 65°C.

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Hydrogen production through methanol steam reforming: Effect of synthesis parameters on Ni–Cu/CaO–SiO 2 catalysts activity

Cited by 48 publications

References 36 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

Hydrogen production by steam reforming of liquefied natural gas (LNG) over mesoporous Ni/Al2O3 catalyst prepared by an EDTA-assisted impregnation method

Synthesis of Ca‐Doped Three‐Dimensionally Ordered Macroporous Catalysts for Transesterification

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