Amorphous silica-alumina composite with regulated acidity for efficient production of hydrogen via steam reforming of dimethyl ether

Wang, Shanshan; Song, Yonghong; Zhao, Yonghua; Liu, Chang; Xiao, Yong-Shan; Zhang, Qijian; Liu, Zhao‐Tie

doi:10.1016/j.cattod.2019.01.056

Cited by 19 publications

(6 citation statements)

References 38 publications

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“…Zeolites exhibited high activity for DME SR in the low temperature range of 250-275 • C, since the hydrolysis could effectively proceed over strong Brønsted acid sites approaching the equilibrium. Alumina catalysts possessing Lewis acid sites were active in the higher temperature range of 300 to 450 • C. A catalyst with γ-Al 2 O 3 exhibited the highest DME conversion and hydrogen production with the optimum reforming temperature at 350-375 • C. Moreover, this catalyst showed the highest stability for DME hydrolysis with high durability for 25 h. Wang et al [140] examined an amorphous silica-alumina composite with regulated acidity for the efficient production of hydrogen via steam reforming of dimethyl ether. In this aim, they mixed silica-alumina of different acidities with metallic Cu-ZnO-Al 2 O 3 and carried out DME SR processes over obtained bifunctional catalysts.…”

Section: Process Parameters and Catalysts For Dme Srmentioning

confidence: 99%

Recent Progress on Hydrogen Storage and Production Using Chemical Hydrogen Carriers

et al. 2022

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Depleting fossil fuel resources and anthropogenic climate changes are the reasons for the intensive development of new, sustainable technologies based on renewable energy sources. One of the most promising strategies is the utilization of hydrogen as an energy vector. However, the limiting issue for large-scale commercialization of hydrogen technologies is a safe, efficient, and economical method of gas storage. In industrial practice, hydrogen compression and liquefaction are currently applied; however, due to the required high pressure (30–70 MPa) and low temperature (−253 °C), both these methods are intensively energy consuming. Chemical hydrogen storage is a promising alternative as it offers safe storage of hydrogen-rich compounds under ambient conditions. Although many compounds serving as hydrogen carriers are considered, some of them do not have realistic perspectives for large-scale commercialization. In this review, the three most technologically advanced hydrogen carriers—dimethyl ether, methanol, and dibenzyltoluene—are discussed and compared. Their potential for industrial application in relation to the energy storage, transport, and mobility sectors is analyzed, taking into account technological and environmental aspects.

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Section: Process Parameters and Catalysts For Dme Srmentioning

confidence: 99%

Recent Progress on Hydrogen Storage and Production Using Chemical Hydrogen Carriers

et al. 2022

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“…Steam reforming of DME (SRD) has attracted great attention due to its high hydrogen production rate and CO 2 as the main carbon species in the products. [15][16][17][18] It is common knowledge that SRD is a consecutive two-step reaction, i.e. DME hydrolysis to methanol (Eqn (1)) and the steam reforming of methanol to hydrogen and CO 2 (SRM) (Eqn (2)).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, non-desirable side reactions such as reverse water gas shift reaction (RWGS), DME cracking, methanation, DME to hydrocarbon reaction (DTH) and methanol to hydrocarbon reaction (MTH) (Eqns ( 4)-( 8)) can also occur, which would depend on the reaction conditions and the catalyst. 14,18…”

Section: Introductionmentioning

confidence: 99%

“…Steam reforming of DME (SRD) has attracted great attention due to its high hydrogen production rate and CO 2 as the main carbon species in the products 15‐18 . It is common knowledge that SRD is a consecutive two‐step reaction, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The overall SRD can be represented as Eqn (3). Moreover, non‐desirable side reactions such as reverse water gas shift reaction (RWGS), DME cracking, methanation, DME to hydrocarbon reaction (DTH) and methanol to hydrocarbon reaction (MTH) (Eqns (4)–(8)) can also occur, which would depend on the reaction conditions and the catalyst 14,18

{CH}_{3} {OCH}_{3} goodbreak+ H_{2} normalO \to {2CH}_{3} OH DME hydrolysis

{CH}_{3} OH goodbreak+ H_{2} normalO \to {3H}_{2} goodbreak+ {CO}_{2} SRM

{CH}_{3} {OCH}_{3} goodbreak+ {3H}_{2} normalO \to {6H}_{2} goodbreak+ {2CO}_{2} SRD

{CO}_{2} goodbreak+ H_{2} \to H_{2} normalO goodbreak+ CO RWGS

{CH}_{3} {OCH}_{3} \to {CH}_{4} goodbreak+ H_{2} goodbreak+ CO DME decomposition

CO goodbreak+ {3H}_{2} goodbreak= {CH}_{4} goodbreak+ H_{2} normalO Methanation

{CH}_{3} {OCH}_{3} \to hydrocarbons DTH

…”

Section: Introductionmentioning

confidence: 99%

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The role of promoters in Cu/Acid‐MMT catalysts for production of hydrogen via steam reforming of dimethyl ether

Luo

Zhao

Zhang

et al. 2022

J of Chemical Tech & Biotech

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Background: The steam reforming of dimethyl ether (DME) is one of the promising technologies for high-efficiency hydrogen production. The key issue for the steam reforming of DME is the development of catalysts with higher performance. In this study, a series of X-Cu/Acid-MMT (X = Co, Ni, Zr, Ce) catalysts were prepared via the impregnation method using Acid-MMT obtained by montmorillonite activated with nitric acid (20 wt%) at 80 °C for 12 h as the support and metallic nitrate as precursor. The catalysts were characterized by XRD, H 2 -TPR, XPS, N 2 O titration and N 2 adsorption-desorption at low temperature.Results: The introduction of promoter X could reduce the interaction between Cu and the support, and more CuO was reduced to Cu 0 ; meanwhile, it was beneficial for improving the dispersion of Cu. This would enhance the reaction rate of steam reforming of DME. Therefore, the introduction of promoter X significantly increased DME conversion, especially Ni-Cu/Acid-MMT presented the maximum DME conversion. However, Ni-Cu/Acid-MMT exhibited low H 2 yield, high selectivity of CO and CH 4 due to reverse water gas shift reaction and methanation reaction. Co-Cu/Acid-MMT catalyst presented the maximum H 2 yield, high conversion of DME, relatively low selectivity of CH 4 and better stability.Conclusions: The introduction of promoters to Cu/Acid-MMT catalyst improved the catalyst performance for the steam reforming of DME. Among these catalysts, Co-Cu/Acid-MMT exhibited remarkable catalytic performance, which is expected to be a potential catalyst for steam reforming of DME.

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Efficient Etherification of 2,5‐Bis(hydroxymethyl)furan to 2,5‐Bis(propoxymethyl)furan by an Amorphous Silica‐Alumina Catalyst in a Fixed‐Bed Reactor

Chen

Xue

et al. 2022

ChemPlusChem

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The efficient etherification of 2,5‐bis(hydroxymethyl)furan (BHMF) to 2,5‐bis(propoxymethyl)furan (BPMF) was achieved by using low‐cost amorphous silica‐aluminas (ASA) catalysts in a fixed‐bed reactor. A considerable yield of BPMF up to 85.1 % was obtained over ASA‐30 catalyst under the reaction conditions of 140 °C, 2.0 MPa of N2, and 0.015 h−1 of WHSV. The excellent performance of ASA‐30 catalyst could be attributed to the relatively stronger acidity (>375 °C) and larger mesoporous size (6 nm), thereby facilitating the conversion of BHMF to BPMF. In addition, the lower ratio of Brønsted/Lewis acid sites for ASA catalyst was found to efficiently suppress the occurrence of side reactions.

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Amorphous silica-alumina composite with regulated acidity for efficient production of hydrogen via steam reforming of dimethyl ether

Cited by 19 publications

References 38 publications

Recent Progress on Hydrogen Storage and Production Using Chemical Hydrogen Carriers

Recent Progress on Hydrogen Storage and Production Using Chemical Hydrogen Carriers

The role of promoters in Cu/Acid‐MMT catalysts for production of hydrogen via steam reforming of dimethyl ether

Efficient Etherification of 2,5‐Bis(hydroxymethyl)furan to 2,5‐Bis(propoxymethyl)furan by an Amorphous Silica‐Alumina Catalyst in a Fixed‐Bed Reactor

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