Thermodynamic analysis of carbon dioxide reforming of methane to syngas with statistical methods

Atashi, Hossein; Gholizadeh, Jaber; Tabrizi, Farshad Farshchi; Tayebi, Jaber; Mousavi, Seyed Amir Hossein Seyed

doi:10.1016/j.ijhydene.2016.07.184

Cited by 48 publications

(12 citation statements)

References 39 publications

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“…Therefore, the transferability of their results into practice is questionable. Furthermore, Chein, et al [16] contradict Atashi, et al [15] by stating that to their finding a high CO 2 excess enhances the performance of a dry reforming reactor. Choudhary and Mondal [17] investigated mixed reforming of methane over perovskite-type catalysts regarding conversion, selectivity and carbon formation.…”

Section: Introductionmentioning

confidence: 93%

“…Hence no conclusion can be drawn regarding the actual reduction in CO 2 emissions. Atashi, et al [15] carried out an intensive statistical analysis on the conversion, yield and product composition in a dry reforming reaction and propose a value they call "desirability" of the product. They came to the conclusion that a molar ratio of CO 2 to CH 4 of 0.5 at the inlet to the reactor is optimal.…”

Section: Introductionmentioning

confidence: 99%

“…They came to the conclusion that a molar ratio of CO 2 to CH 4 of 0.5 at the inlet to the reactor is optimal. It is unclear, how the "desirability" is defined by Atashi, et al [15] and a sub-stoichiometric input of CO 2 , which they propose, leads to incomplete conversion of CH 4 , causing a drastic loss of the valuable feedstock CH 4 . Therefore, the transferability of their results into practice is questionable.…”

Section: Introductionmentioning

confidence: 99%

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(Solar) Mixed Reforming of Methane: Potential and Limits in Utilizing CO2 as Feedstock for Syngas Production—A Thermodynamic Analysis

2018

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The reforming of natural gas with steam and CO2 is commonly referred to as mixed reforming and considered a promising route to utilize CO2 in the production of synthetic fuels and base chemicals such as methanol. In the present study, the mixed reforming reaction is assessed regarding its potential to effectively utilize CO2 in such processes based on simple thermodynamic models. Requirements for the mixed reforming reactions based on process considerations are defined. These are the avoidance of carbon formation in the reactor, high conversion of the valuable inlet streams CH4 and CO2 as well as a suitable syngas composition for subsequent synthesis. The syngas composition is evaluated based on the module M = ( z H 2 − z CO 2 ) / ( z CO 2 + z CO ) , which should assume a value close to 2. A large number of different configurations regarding CO2/H2O/CH4 at the reactor inlet, operating pressure and outlet temperature are simulated and evaluated according to the defined requirements. The results show that the actual potential of the mixed reforming reaction to utilize CO2 as feedstock for fuels and methanol is limited to approximately 0.35 CO2/CH4, which is significantly lower than suggested in literature. At 900 °C and 7 bar at the reactor outlet, which is seen suitable for solar reforming, a ratio of H2O/CH4 of 1.4 can be set and the resulting value of M is 1.92 (CO2/CO/H2 = 0.07/0.4/1).

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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(Solar) Mixed Reforming of Methane: Potential and Limits in Utilizing CO2 as Feedstock for Syngas Production—A Thermodynamic Analysis

2018

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“…It is widely accepted in the literature that during the dry DRM, the main reaction (Equation 1) is accompanied by competing parallel reactions that modify the DRM stoichiometry (products distribution), such as the reverse water gas shift (Equation 2), methane cracking (Equation 3) and the Boudouard reaction (Equation 4) (Usman et al, 2015;Atashi et al, 2017). Regarding carbon, it is generally accepted that its formation decreases with increasing temperature (carbon formation is thermodynamically favored at lower temperatures), however considerable amounts are formed even at temperatures as high as 800 • C (Nikoo and Amin, 2011;Jafarbegloo et al, 2015).…”

Section: Catalytic Performancementioning

confidence: 99%

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Charisiou

Siakavelas

Papageridis

et al. 2017

Front. Environ. Sci.

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The time-on-stream catalytic performance and stability of 8 wt. % Ni catalyst supported on two commercially available catalytic supports, ZrO 2 and 15 wt.% WO 3 -ZrO 2 , was investigated under the biogas dry reforming reaction for syngas production, at 750 • C and a biogas quality equal to CH 4 /CO 2 = 1.5, that represents a common concentration of real biogas. A number of analytical techniques such as N 2 adsorption/desorption (BET method), XRD, H 2 -TPR, NH 3 -and CO 2 -TPD, SEM, ICP, thermal analysis (TGA/DTG) and Raman spectroscopy were used in order to determine textural, structural and other physicochemical properties of the catalytic materials, and the type of carbon deposited on the catalytic surface of spent samples. These techniques were used in an attempt to understand better the effects of WO 3 -induced modifications on the catalyst morphology, physicochemical properties and catalytic performance. Although Ni dispersion and reducibility characteristics were found superior on the modified Ni/WZr sample than that on Ni/Zr, its dry reforming of methane (DRM) performance was inferior; a result attributed to the enhanced acidity and complete loss of the basicity recorded on this catalyst, an effect that competes and finally overshadows the benefits of the other superior properties. Raman studies revealed that the degree of graphitization decreases with the insertion of WO 3 in the crystalline structure of the ZrO 2 support, as the I D /I G peak intensity ratio is 1.03 for the Ni/Zr and 1.29 for the Ni/WZr catalyst.

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“…Supported catalysts, perovskite oxides catalysts, core–shell catalysts, mesoporous catalysts, etc. were developed, − and the thermodynamics and mechanism of the reaction were studied. − This basic research considerably promoted the development of catalysts for the MDR reaction. Despite the achievements that have been obtained, MDR is not industrially mature.…”

Section: Introductionmentioning

confidence: 99%

Design Strategy, Synthesis, and Mechanism of Ni Catalysts for Methane Dry Reforming Reaction: Recent Advances and Future Perspectives

Wang

2022

Energy Fuels

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Methane dry reforming (MDR, CH4 + CO2 → CO + H2) receives great attention because of the contributions to reducing the emission of greenhouse gases and producing valuable syngas. In order to provide a clear sense of the progress of Ni-based catalysts for MDR in recent decades, we summarized the latest related research papers to illustrate new achievements from the aspects of catalyst preparation and molecule activation. First, the reaction patterns and thermodynamics in MDR are briefly introduced. Then, recent advances in design strategy, synthesis approaches, and the MDR mechanism of Ni catalysts are reviewed in detail. Finally, general remarks and perspectives for MDR in the near future are suggested. The challenges of sintering and carbon deposition on the Ni-based catalysts can be alleviated by rational catalyst design and synthesis, and the pathway of MDR can be revealed by mechanism investigation. These strongly support the establishment of a structure–performance relationship for the MDR reaction over the Ni-based catalysts. It is hoped that this paper will give researchers new ideas and guidance for innovation regarding the MDR reaction, especially for designing stable Ni catalysts and studying the MDR mechanism.

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Thermodynamic analysis of carbon dioxide reforming of methane to syngas with statistical methods

Cited by 48 publications

References 39 publications

(Solar) Mixed Reforming of Methane: Potential and Limits in Utilizing CO2 as Feedstock for Syngas Production—A Thermodynamic Analysis

(Solar) Mixed Reforming of Methane: Potential and Limits in Utilizing CO2 as Feedstock for Syngas Production—A Thermodynamic Analysis

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Design Strategy, Synthesis, and Mechanism of Ni Catalysts for Methane Dry Reforming Reaction: Recent Advances and Future Perspectives

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