Hydrogen production by Co-based bimetallic nano-catalysts and their performance in methane steam reforming

Shen, Qiuwan; Jiang, Yuhang; Xia, Feihong; Wang, Biao; Lv, Xinrong; Ye, Weiqiang; Yang, Guogang

doi:10.1080/10916466.2020.1774605

Cited by 16 publications

(9 citation statements)

References 12 publications

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“…As the continuum phase in the centrifugal slurry pump, water is incompressible, thus the Renault eddy viscosity model is employed to calculate the liquid flow field. The continuity equation, momentum equation, and RNG (renormalization group) k-ε turbulence model equations can be referred to the literatures [20][21][22][23][24].…”

Section: Methodsmentioning

confidence: 99%

A Prediction Method of Wear for Volute Casing of a Centrifugal Slurry Pump

Shi

Pan

et al. 2020

Geofluids

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Volute wall wear situations directly affect a long time safe operation for the centrifugal slurry pump unit and the whole system. In the present study, internal flow field is numerically investigated in a solid-liquid centrifugal pump, and the volute wall wear caused by the solid-liquid two-phase flow is predicted with wear equation. A systematic analysis on the wear mechanism of the centrifugal pump volute wall is carried out deeply, including the volute wall wear region, wear rate, and the relationship among inlet flow rate, particle concentration, and particle size. The predicted high erosion intensity area shows good agreement with the experimental erosion area, and the predicted and experimental areas are both located at the volute angle of 180° and near tongue. Therefore, the wear equation put forward in the present study is effective for estimating the erosion intensity and predicting the erosion area around the volute casing of a centrifugal pump.

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Section: Methodsmentioning

confidence: 99%

A Prediction Method of Wear for Volute Casing of a Centrifugal Slurry Pump

Shi

Pan

et al. 2020

Geofluids

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“…Among the reforming processes, methane steam reforming (MSR) is the most feasible route to convert methane into hydrogen [13].…”

Section: Steam Reformingmentioning

confidence: 99%

“…One of the major challenges in MSR process, is the managing of the high reaction temperatures; to reach 700-800 • C at the center of the catalytic bed, 1200 • C on the external reactor wall are needed. The use of structured catalysts, obtained by coating highly conductive carriers, with the catalytic formulation, provide a flattening of radial thermal profile on the catalytic bed, thus lowering the outside temperatures [13]. Alternatively, it has also been proposed to fill the voids of highly conductive open cell metal foams with small catalytic pellets, in order to exploit the radial heat transfer of the tubular reactor, due to the thermal conductivity of the interconnected solid matrix, while avoiding the washcoating of metal structures [25].…”

Section: Methane Steam Reformingmentioning

confidence: 99%

“…In alkaline electrolysis cell, the electrodes are immersed in the liquid electrolyte, typically a 25-30 wt% solution of KOH or NaOH separated by a diaphragm. Anodic (12) and cathodic reactions (13) The choice of the electrocatalysts is a critical issue, those based on noble metals are highly efficient, on the other hand, the most convenient material used for the electrodes are Ni-based [158,159], however to improve the performance and reduce the degradation, a series of metals can be used as additives, including cobalt, vanadium iron and selenide [160]. The use of noble metal-based electrodes could provide better performance however, cheaper alternative would be preferred.…”

Section: Alkaline Electrolysis Cellmentioning

confidence: 99%

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Main Hydrogen Production Processes: An Overview

et al. 2021

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Due to its characteristics, hydrogen is considered the energy carrier of the future. Its use as a fuel generates reduced pollution, as if burned it almost exclusively produces water vapor. Hydrogen can be produced from numerous sources, both of fossil and renewable origin, and with as many production processes, which can use renewable or non-renewable energy sources. To achieve carbon neutrality, the sources must necessarily be renewable, and the production processes themselves must use renewable energy sources. In this review article the main characteristics of the most used hydrogen production methods are summarized, mainly focusing on renewable feedstocks, furthermore a series of relevant articles published in the last year, are reviewed. The production methods are grouped according to the type of energy they use; and at the end of each section the strengths and limitations of the processes are highlighted. The conclusions compare the main characteristics of the production processes studied and contextualize their possible use.

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“…In 1970, Ponton and Nishia proposed a trial method [35]. Shen et al and Linnhoff et al [36,37] proposed the pinch analysis method, which is a method to solve the problem of inconsistency of energy flow in heat exchanger networks [38].…”

Section: Exergy Analysismentioning

confidence: 99%

Optimization of the Natural Gas Purification Process Based on Exergy Analysis

et al. 2020

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This study is aimed at carrying out investigations on a domestic gas field, located in Yanchang, China, with a view to optimize the natural gas purification process. The main objectives of this work are (i) to reduce the natural gas purification system’s energy consumption and (ii) improve the existing purification levels. Process simulations were carried out using Aspen Plus™ software, and a comprehensive technical and economic analysis was carried out. The single-factor sensitivity analysis method was used to determine the parameters of absorption, such as the reflux ratio and number of stages. The heat transfer process was analyzed using the energy-saving method of the energy system, and a modified process was recommended. The optimization results show that the recommended system has better purification performance, the comprehensive energy consumption is effectively reduced, and the energy efficiency is improved by 9%.

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Hydrogen production by Co-based bimetallic nano-catalysts and their performance in methane steam reforming

Cited by 16 publications

References 12 publications

A Prediction Method of Wear for Volute Casing of a Centrifugal Slurry Pump

A Prediction Method of Wear for Volute Casing of a Centrifugal Slurry Pump

Main Hydrogen Production Processes: An Overview

Optimization of the Natural Gas Purification Process Based on Exergy Analysis

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