Progress on methanol reforming technologies for highly efficient hydrogen production and applications

Mei, Deqing; Qiu, Xingye; Liu, Haiyu; Wu, Qiong; Yu, Shizheng; Xu, Liming; Zuo, Tao; Wang, Yancheng

doi:10.1016/j.ijhydene.2022.08.134

Cited by 68 publications

(13 citation statements)

References 168 publications

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“…There exist many factors that can affect the effectiveness of the catalyzed washcoat, such as the temperature, tortuosity factor, pore structure, and porosity. For example, catalyst effectiveness for hydrogen production from methanol by the endothermic reforming reaction can be improved with the addition of heat or with an increase in the temperature. , The yield of hydrogen can be used to indicate the catalyst effectiveness. , Reaction conditions that maximize the catalyst effectiveness may be optimum for the production of hydrogen.…”

Section: Resultsmentioning

confidence: 99%

“…69,70 The yield of hydrogen can be used to indicate the catalyst effectiveness. 69,70 Reaction conditions that maximize the catalyst effectiveness may be optimum for the production of hydrogen. The effect of washcoat thickness on the mean effectiveness factor over the entire length of the reactor is illustrated in Figure 14 under specified conditions in different channel heights.…”

Section: Catalyst Effectivenessmentioning

confidence: 99%

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Computational Study of Transport Phenomena at the Microscale: Effects of Washcoat Thickness and Characteristic Length on the Heat and Mass Transfer Processes in Millisecond Reactors for Hydrogen Production

Chen

2023

Ind. Eng. Chem. Res.

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Transport phenomena in millisecond reactors are poorly understood due to extremely short contact times and nonequilibrium states. Numerical investigation of transport phenomena at the microscale was performed for hydrogen production by the steam-methanol reforming reaction. Heat and mass transport analyses were conducted, and dimensionless number analyses were carried out to gain insights into the nature of the transport processes. The effectiveness factor and Thiele modulus were calculated to understand how effectively the catalyzed washcoat is being used. The results indicated that the system is mass transfer limited because significant species gradients exist. The mass transfer rate is about 1 order of magnitude lower than the intrinsic reaction rate. Momentum diffusivity dominates the transport behavior, and convection is more significant compared to conduction and diffusion. Local Nusselt and Sherwood numbers of about 100 and about 55 can be obtained, respectively, with a pressure drop of less than about 200 Pa. Both the washcoat thickness and characteristic length are critically important in determining the catalyst effectiveness and reactor behavior. Large variations in the effectiveness factor must be accounted for to deliver accurate results. The results provide useful guidance in the operation and design of millisecond reactors by quantifying transport process variations and identifying the effectiveness of catalyzed washcoats.

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Section: Resultsmentioning

confidence: 99%

Section: Catalyst Effectivenessmentioning

confidence: 99%

Computational Study of Transport Phenomena at the Microscale: Effects of Washcoat Thickness and Characteristic Length on the Heat and Mass Transfer Processes in Millisecond Reactors for Hydrogen Production

Chen

2023

Ind. Eng. Chem. Res.

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“…1 Methanol as a significant biomass-derived oxygenated hydrocarbon possesses the advantages of renewability, high hydrogen-to-carbon ratio, and convenient storage and transportation; most importantly, compared with most other fuels (ethanol, glycerol, etc. ), 2,3 methanol can react at a lower temperature to generate hydrogen, because it does not need to break a C-C bond. 4,5 In 2002, R. D. Cortright et al 6 proposed the method of methanol-reforming for hydrogen production, which blazed a trail for efficient hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

Screening of steam-reforming catalysts using unsupervised machine learning

Liu,

Liang,

Huang

et al. 2023

Catal. Sci. Technol.

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“…Second, the concentration of hydrogen produced by MSR reaction is larger, which can account for more than half of the total gas composition. 3,4 This reaction can greatly improve the efficiency of using the equipment without causing damage or other adverse effects on the equipment. The MSR reaction process is displayed in Equation (1).…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogen production in this way produces neither pollution nor excess by‐products. Second, the concentration of hydrogen produced by MSR reaction is larger, which can account for more than half of the total gas composition 3,4 . This reaction can greatly improve the efficiency of using the equipment without causing damage or other adverse effects on the equipment.…”

Section: Introductionmentioning

confidence: 99%

CuO‐modified LaNi_0.4Al_0.6O₃₋_δ with improvement performance in MSR at low temperature

Xin

Shao

et al. 2023

J Am Ceram Soc.

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The novel CuO/LaNi0.4Al0.6O3−δ catalyst was synthesized by the impregnation method and characterized by X‐ray diffraction (XRD), TEM, BET, and X‐ray photoelectron spectroscopy (XPS) techniques. The effects of CuO loading amount on the microstructure and the hydrogen production performance from methanol steam reforming (MSR) were investigated. Results demonstrate that the sample with 15 wt% CuO loading has the best hydrogen production performance. Furthermore, compared with the unloaded LaNi0.4Al0.6O3−δ perovskite catalysts, the methanol conversion of 15 wt% CuO/LaNi0.4Al0.6O3−δ was improved, and the catalytic temperature of MSR was reduced. LaNi0.4Al0.6O3−δ as support will form a strong interaction with Cu particles exposed on or around its surface and improve the catalytic performance. The XPS results show that the structure of LaNi0.4Al0.6O3−δ perovskite oxide is not destroyed after reduction treatment, whereas CuO is reduced to elemental Cu, which is consistent with the XRD results. The reduced catalyst has a porous structure, which helps to increase the contact area between the reaction medium and the active components. This improves the efficiency of the reaction. In addition, the optimal catalytic temperature, water–methanol ratio, and liquid hourly space velocity were determined to be 350°C, 2.5:1, and 15 h−1, respectively. Therefore, the CuO/LaNi0.4Al0.6O3−δ developed in this study is a promising catalyst for MSR applications.

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Progress on methanol reforming technologies for highly efficient hydrogen production and applications

Cited by 68 publications

References 168 publications

Computational Study of Transport Phenomena at the Microscale: Effects of Washcoat Thickness and Characteristic Length on the Heat and Mass Transfer Processes in Millisecond Reactors for Hydrogen Production

Computational Study of Transport Phenomena at the Microscale: Effects of Washcoat Thickness and Characteristic Length on the Heat and Mass Transfer Processes in Millisecond Reactors for Hydrogen Production

Screening of steam-reforming catalysts using unsupervised machine learning

CuO‐modified LaNi_0.4Al_0.6O₃₋_δ with improvement performance in MSR at low temperature

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Progress on methanol reforming technologies for highly efficient hydrogen production and applications

Cited by 68 publications

References 168 publications

Computational Study of Transport Phenomena at the Microscale: Effects of Washcoat Thickness and Characteristic Length on the Heat and Mass Transfer Processes in Millisecond Reactors for Hydrogen Production

Computational Study of Transport Phenomena at the Microscale: Effects of Washcoat Thickness and Characteristic Length on the Heat and Mass Transfer Processes in Millisecond Reactors for Hydrogen Production

Screening of steam-reforming catalysts using unsupervised machine learning

CuO‐modified LaNi0.4Al0.6O3−δ with improvement performance in MSR at low temperature

Contact Info

Product

Resources

About

CuO‐modified LaNi_0.4Al_0.6O₃₋_δ with improvement performance in MSR at low temperature