Analysis of CO2 utilization into synthesis gas based on solar thermochemical CH4-reforming

Lougou, Bachirou Guene; Shuai, Yong; Chaffa, Gédéon; Xing, Huaizhong; Tan, He‐Ping; Du, Huibin

doi:10.1016/j.jechem.2018.01.011

Cited by 30 publications

(7 citation statements)

References 51 publications

(82 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that the DRM reactions were defined as volumetric type in this study, which was considered to only take place in the porous zone. Al 2 O 3 porous ceramic with excellent temperature resistance and mechanical strength was filled into the reactor chamber with the aim to enlarge reaction areas and provide sufficient contact with the feed gas . Then, Ni nanoparticles were coated on the surface of Al 2 O 3 support to obtain better activity and catalysis.…”

Section: Models and Methodsmentioning

confidence: 99%

“…The influence of CH 4 /CO 2 feed ratio in addition to that of the temperature on the chemical species conversion and carbon deposition was discussed. Compared with the first thermal boundary condition, the concentrated solar irradiation generated by CSP technique will form a more complex thermoenvironment and varied composition changes of the main reactants inside the STR. ,, On the other hand, porous media have the advantage of enhancing heat and mass transfer, thereby improving the thermochemical performance. , However, the effect of the porous media on carbon deposition remains uncertain.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Investigation of Carbon Deposition Behavior in Ni/Al₂O₃-Based Catalyst Porous-Filled Solar Thermochemical Reactor for the Dry Reforming of Methane Process

Zhang

Pang

Pan

et al. 2019

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

Due to the utilization of concentrated solar energy, a more complex high-temperature thermal environment will be formed inside the solar thermochemical reactor, thereby resulting in complicated behaviors of chemical reactions. This paper numerically investigates the carbon deposition behaviors inside a Ni/Al 2 O 3 -based catalyst porous-filled solar thermochemical reactor for the dry reforming of methane (DRM) process under various operational conditions. The reaction kinetics for DRM including four side reactions are programmed via UDFs. The simulation results indicate that the optimal structural parameters of porous media for high-value syngas products with less carbon deposition are ϕ = 0.8 and d p = 2 mm, while the optimal feed ratio is CH 4 /CO 2 = 1. Besides, the operating condition at v in = 100 mL/min and P lamp = 0.7 kW has the advantage of obtaining higher conversion rate while reducing the carbon deposition rate to some extent.

show abstract

Section: Models and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Carbon Deposition Behavior in Ni/Al₂O₃-Based Catalyst Porous-Filled Solar Thermochemical Reactor for the Dry Reforming of Methane Process

Zhang

Pang

Pan

et al. 2019

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…2 CH 4 is also a key feedstock in the chemical industry to produce chemicals such as alcohols, aldehydes, olefins, and aliphatic hydrocarbons. 3 Current thermocatalytic processes used for CH 4 conversion demand high temperatures and pressures and are susceptible to catalyst poisoning. 4−6 In recent years, researchers have been actively pursuing the development of electrochemical technologies powered by lowcarbon electricity for CH 4 conversion to valuable oxygenated chemicals, including CH 3 OH and formic acid (HCOOH).…”

Section: Introductionmentioning

confidence: 99%

Uncovering Electrochemical Methane Oxidation Mechanism through the In Situ Detection of Reaction Intermediates

Al-Attas,

Kannimuthu,

Khan

et al. 2024

ACS Catal.

View full text Add to dashboard Cite

The electrochemical partial oxidation of methane (CH 4 ) to value-added chemicals under ambient conditions provides a solution for harnessing abundant natural gas resources. Here, we investigate α-Fe 2 O 3 as a model catalyst to gain a mechanistic understanding of the electrochemical CH 4 oxidation reaction (eCH 4 OR). During chronoamperometric experiments, we obtain liquid products (formic acid, acetic acid, and acetone) with ∼6.5% total Faradaic efficiency at 2.3 V versus the reversible hydrogen electrode (V RHE ). At lower potentials below 2.0 V RHE , non-Faradaic CH 4 adsorption occurred, confirmed by in situ ATR-SEIRAS (attenuated total reflectance−surface-enhanced infrared absorption spectroscopy) and impedance spectroscopies. In addition to verifying the presence of the Fe IV O species, in situ spectroelectrochemical measurements revealed that CH 4 oxidation initiates via H-abstraction to form •OCH 3 species. The reaction undergoes further oxidation steps, leading to formate. Coupling between •OCH 3 and formate generates •OCOCH 3 species. Further, C−C coupling between − COCH 3 and − CH 3 resulted in acetone formation. Real-time proton-transfer-reaction time-of-flight mass spectrometry (PTR-TOF-MS) confirms the proposed pathways. Based on these observations, we propose a mechanistic pathway for selective CH 4 electrooxidation.

show abstract

“…CO 2 reforming of CH 4 (CRM) can realize the direct conversion of the two gases, and it is of considerable importance for carbon emission reduction. The conversion of these two GHGs has attracted considerable attention all over the world [1][2][3]. In the CRM reaction, known as methane dry reforming (DRM), the H 2 /CO in the reaction product is close to 1, which can then produce liquid fuel and value-added chemicals via the Fischer-Tropsch process.…”

Section: Introductionmentioning

confidence: 99%

Structure Characteristics and Removal Behavior of the Deposited Carbon on Ni-Al2O3 Catalyst for CO2 Reforming of CH4

Mo,

Ren,

et al. 2023

Processes

View full text Add to dashboard Cite

Four catalysts were prepared in our previous work using the solution combustion method, incipient-wetness impregnation method, colloid mill circulating impregnation method, and hydrothermal-precipitation method, respectively, labeled as SCM, IMP, T310, and HTP. And the performance (stability) of the four catalysts for CO2 reforming of CH4 was investigated at 800 °C. In this paper, the composition and structure characteristics of the deposited carbon on the above four catalysts were tested through TEM, Raman, TPH, and TG-DTG technologies. The results showed that filamentous carbon was the primary type of carbon deposition on the catalysts, and a large amount of accumulated carbon would block the catalyst pores, affecting the catalytic performance. The carbon deposited on the catalyst prepared using the hydrothermal-precipitation method calcined at 800 °C exhibited a high degree of graphitization, and the proportion of graphitized carbon was considerable, which is harmful to the stability of the catalyst. The decarburization temperature of the deposited carbon on the four catalysts was mainly in the range of 500–700 °C. Using the Coats–Redfern model, as the reaction order was set as 1, 2, 3, 4, and 5, the decarburization activation energy ranged between 50 and 80 kJ/mol.

show abstract

Analysis of CO2 utilization into synthesis gas based on solar thermochemical CH4-reforming

Cited by 30 publications

References 51 publications

Numerical Investigation of Carbon Deposition Behavior in Ni/Al₂O₃-Based Catalyst Porous-Filled Solar Thermochemical Reactor for the Dry Reforming of Methane Process

Numerical Investigation of Carbon Deposition Behavior in Ni/Al₂O₃-Based Catalyst Porous-Filled Solar Thermochemical Reactor for the Dry Reforming of Methane Process

Uncovering Electrochemical Methane Oxidation Mechanism through the In Situ Detection of Reaction Intermediates

Structure Characteristics and Removal Behavior of the Deposited Carbon on Ni-Al2O3 Catalyst for CO2 Reforming of CH4

Contact Info

Product

Resources

About

Analysis of CO2 utilization into synthesis gas based on solar thermochemical CH4-reforming

Cited by 30 publications

References 51 publications

Numerical Investigation of Carbon Deposition Behavior in Ni/Al2O3-Based Catalyst Porous-Filled Solar Thermochemical Reactor for the Dry Reforming of Methane Process

Numerical Investigation of Carbon Deposition Behavior in Ni/Al2O3-Based Catalyst Porous-Filled Solar Thermochemical Reactor for the Dry Reforming of Methane Process

Uncovering Electrochemical Methane Oxidation Mechanism through the In Situ Detection of Reaction Intermediates

Structure Characteristics and Removal Behavior of the Deposited Carbon on Ni-Al2O3 Catalyst for CO2 Reforming of CH4

Contact Info

Product

Resources

About

Numerical Investigation of Carbon Deposition Behavior in Ni/Al₂O₃-Based Catalyst Porous-Filled Solar Thermochemical Reactor for the Dry Reforming of Methane Process

Numerical Investigation of Carbon Deposition Behavior in Ni/Al₂O₃-Based Catalyst Porous-Filled Solar Thermochemical Reactor for the Dry Reforming of Methane Process