Hydrogen Production from Oxygenated Hydrocarbons: Review of Catalyst Development, Reaction Mechanism and Reactor Modeling

Mohamedali, Mohanned; Henni, Amr; Ibrahim, Hussameldin

doi:10.1002/9781119283676.ch1

Cited by 4 publications

(8 citation statements)

References 338 publications

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“…Hydrogen is considered to be a promising candidate to replace the presently used energy resources. 1 It is one of the promising alternatives for energy production because of its ability to dramatically decrease oil consumption, greenhouse gas (GHG) emissions, and tail pipe pollution. Therefore, hydrogen as a promising clean energy resource is emerging for widespread future use.…”

Section: Introductionmentioning

confidence: 99%

“…1 The use of ZrO 2 and CeO 2 supports with a transition-metal catalyst can considerably improve the oxygen storage capacity, redox properties, thermal stability, and catalytic activity in reforming processes. 1 Ce x Zr 1−x O 2 can be prepared by different techniques such as urea hydrolysis, 9 coprecipitation, 10 sol−gel techniques, 11 and surfactant-assisted methods. 12 Among the above-noted synthesis methods, the surfactant-assisted approach is considered the most attractive technique because of the soft template effect, catalyst reproducibility, and the ability to fine-tune the structure.…”

Section: Introductionmentioning

confidence: 99%

“…Owing to these serious disadvantages, it is necessary to discover other alternative energy resources that are abundant and environmentally friendly. Hydrogen is considered to be a promising candidate to replace the presently used energy resources . It is one of the promising alternatives for energy production because of its ability to dramatically decrease oil consumption, greenhouse gas (GHG) emissions, and tail pipe pollution.…”

Section: Introductionmentioning

confidence: 99%

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Metal Oxide-Based Catalysts for the Autothermal Reforming of Glycerol

Sabri

Idem

Ibrahim

2018

Ind. Eng. Chem. Res.

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In this study hydrogen production from the autothermal reforming (ATR) of glycerol was investigated in a packed bed tubular reactor using nickel-based catalysts with theoretical composition of 5% Ni/Ce0.5Zr0.33M0.16O2−δ, where M is the promoter element selected from Mg, Ca, Y, La, or Gd. The structural, textural, and physicochemical characteristics of the catalysts were investigated using various characterization techniques. The catalytic activity was evaluated in a temperature range from 450 to 700 °C; steam-to-glycerol (S/G) ratio of 6, 9, and 12; and oxygen-to-glycerol (O/G) ratio of 0.2, 0.5, and 0.8 at atmospheric pressure. Among all the catalyst formulations prepared in the current study, 5Ni/CeZrGd exhibited the best catalytic performance and stability compared to the other promoter elements. For 5Ni/CeZrGd catalysts, it was found that, until 600 °C, conversion increased rapidly with the increase in temperature to reach 82 mol % glycerol conversion and more than 70 mol % H2 selectivity, which can be optimal operation conditions for industrial applications. Furthermore, the increase of O/G ratio showed similar trends. Although adding more S/G in the feed did not show any noticeable increase in glycerol conversion, it resulted in lower hydrogen concentration in the reformate product due to the dilution effect of steam.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Metal Oxide-Based Catalysts for the Autothermal Reforming of Glycerol

Sabri

Idem

Ibrahim

2018

Ind. Eng. Chem. Res.

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“…In view of this, it will be economically viable to prepare stable catalysts for the in‐situ production of hydrogen gas without having to purify crude glycerol. The use of crude glycerol for the production of renewable hydrogen has great potential, due to the high H/C ratio of the glycerol molecule, which can yield up to 7 mol of H 2 per 1 mol of glycerol according to the stoichiometric glycerol reforming reaction 15,19 …”

Section: Introductionmentioning

confidence: 99%

Optimization of hydrogen production via catalytic autothermal reforming of crude glycerol using response surface methodology and artificial neural network

2021

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Summary In this work, the central composite design of the response surface methodology (RSM) and artificial neural network (ANN) were deployed to investigate process variables and optimize hydrogen gas production via autothermal reforming of crude glycerol using 5%Ni/CeZrCa catalyst in a packed bed tubular reactor. The input variables studied are reaction temperature, feed flow rate, steam to carbon ratio (S/C), oxygen to carbon ratio (O/C), and catalyst weight. The neural network analysis of these input variables measured their individual significance and contribution in the autothermal reforming process prior to the development of a quadratic polynomial model with RSM for predicting hydrogen yield as well as optimization. Statistical analyses showed that the mathematical model developed excellently represents the data with high model adequacy and no significant lack of fit. The results of the neural network input variable significance ranking approach showed that the reaction temperature contributed more than any other independent variable at a ranking weight of 53% while the O/C ratio showed the least impact at 3%. The results of the optimization gave the optimum parameters for hydrogen gas yield as follows; Temperature: 650°C, crude glycerol flow rate: 3.3 mmol C/min, S/C: 2.34, O/C: 0.052, and catalyst weight of 0.15 g with a maximum feed conversion of approximately 92% and 97% H2 yield. ANN provided a better regression with excellent statistical test values as follows R2: 0.999, MSE: 10−8, AAD: 0.34%, and RMSE: 3.5 × 10−4%. It is clear from the results of the model adequacy and error calculations that ANN is superior and has shown a better model fit than the RSM.

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“…The combination of two metals to form bimetallic systems is reported in literature as an efficient approach to improve the catalytic performance in hydrogen production from reforming reactions [52], and it has been concluded that bimetallic catalysts significantly enhance the catalyst lifetime when compared to monometallic catalysts [53]. The physicochemical properties of 5 wt % Ni-10 wt % Co/Al2O3 catalyst prepared via co-impregnation method were examined and its catalytic …”

Section: Bimetallic Catalystsmentioning

confidence: 99%

Recent Advances in Supported Metal Catalysts for Syngas Production from Methane

2018

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Abstract:Over the past few years, great attention is paid to syngas production processes from different resources especially from abundant sources, such as methane. This review of the literature is intended for syngas production from methane through the dry reforming (DRM) and the steam reforming of methane (SRM). The catalyst development for DRM and SRM represents the key factor to realize a commercial application through the utilization of more efficient catalytic systems. Due to the enormous amount of published literature in this field, the current work is mainly dedicated to the most recent achievements in the metal-oxide catalyst development for DRM and SRM in the past five years. Ni-based supported catalysts are considered the most widely used catalysts for DRM and SRM, which are commercially available; hence, this review has focused on the recent advancements achieved in Ni catalysts with special focus on the various attempts to address the catalyst deactivation challenge in both DRM and SRM applications. Furthermore, other catalytic systems, including Co-based catalysts, noble metals (Pt, Rh, Ru, and Ir), and bimetallic systems have been included in this literature review to understand the observed improvements in the catalytic activities and coke suppression property of these catalysts.

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Hydrogen Production from Oxygenated Hydrocarbons: Review of Catalyst Development, Reaction Mechanism and Reactor Modeling

Cited by 4 publications

References 338 publications

Metal Oxide-Based Catalysts for the Autothermal Reforming of Glycerol

Metal Oxide-Based Catalysts for the Autothermal Reforming of Glycerol

Optimization of hydrogen production via catalytic autothermal reforming of crude glycerol using response surface methodology and artificial neural network

Recent Advances in Supported Metal Catalysts for Syngas Production from Methane

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