Design an in-situ reduction of Ni/C–SiO 2 catalyst and new insights into pretreatment effect for CH 4 –CO 2 reforming reaction

Li, Hangjie; He, Yingluo; Shen, Dongming; Cheng, Shilin; Wang, Jingyan; Liu, Heyang; Xing, Chuang; Shan, Shengdao; Lu, Chao; Yang, Renqiang

doi:10.1016/j.ijhydene.2017.03.156

Cited by 19 publications

(9 citation statements)

References 48 publications

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“…The crystal phase compositions of the fabricated catalysts and reduced Pd/SiO 2 –SZ catalyst were characterized by XRD (Figure A and Figure S3). The broad peak located at 23.0° was attributed to SiO 2 , and the diffraction peaks at 33.8°, 41.9°, 54.7°, 60.2°, and 71.3° were indexed to the PdO phase over Pd/SiO 2 catalyst . For the Pd/SiO 2 ‐S and Pd/SiO 2 –SZ capsule catalysts, both the SiO 2 and PdO phases were clearly observed, indicating that the structural characteristic of the Pd/SiO 2 core catalyst was completely preserved during the hydrothermal process.…”

Section: Resultsmentioning

confidence: 96%

A Well‐Defined Core–Shell‐Structured Capsule Catalyst for Direct Conversion of CO₂ into Liquefied Petroleum Gas

Zhang

Guo

et al. 2020

ChemSusChem

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Section: Resultsmentioning

confidence: 96%

A Well‐Defined Core–Shell‐Structured Capsule Catalyst for Direct Conversion of CO₂ into Liquefied Petroleum Gas

Zhang

Guo

et al. 2020

ChemSusChem

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“…and certain pretreatments after the original preparation procedure (with H 2 , N 2 , CO 2 , etc.) may also impact the nickel particle size and dispersion (Table 1, entries 9 to 12) [36][37][38][39].…”

Section: Figurementioning

confidence: 99%

Ni-Silica-based Catalysts for CH4 Reforming by CO2 with Enhanced Stability: Recent Designs and the Impacts of Ni Confinement, Promoters, and Core-Shell Structures

Daoura¹,

Boutros²,

Launay³

2021

JEPT

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CO2 reforming of CH4, also referred to as the Dry Reforming of Methane (DRM), is considered an excellent method to produce H2 and CO (syngas), which are known to be used for the production of higher alkanes and oxygenates. Despite nickel’s moderate toxicity, Ni-based heterogeneous catalysts are considered excellent candidates for use in DRM due to their reasonable performances and economic advantages. However, these materials also present severe drawbacks, such as sintering of the active phase and coke (carbon) deposition, which may, in certain cases, lead to severe catalyst deactivation. Several synthesis strategies, mostly based on the stabilization of nickel through oxide support, have been developed to overcome these issues. Silica-based materials are investigated widely due to their availability, high surface area, and the confinement capacity conferred by their controlled porosity. The present review summarizes the progress in the design of Ni/silica-based catalysts for the dry reforming of methane between the years 2015 and 2018. The different strategies implemented are discussed to assist future research works in designing the anti-coking and anti-sintering nickel-silica-based catalysts.

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“…The carbon dioxide, methane reforming universally known as dry reforming (DRM) is a convenient method for producing synthesis gases from two powerful greenhouse gases (CH 4 and CO 2 ) [1][2][3][4][5]. Nevertheless, synthesis gas, the product of CH 4 dry reforming, is a vital raw material for the production of liquid hydrocarbons [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pressure on Na0.5La0.5Ni0.3Al0.7O2.5 Perovskite Catalyst for Dry Reforming of CH4

et al. 2020

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In this paper, a comprehensive study was carried out on the application of perovskite catalyst in dry reforming of CH4. The perovskite catalyst was prepared using a sol–gel method. The prepared samples were characterized by N2 adsorption/desorption, TPR, XRD, CO2-TPD, TGA, TPO, Raman, and SEM techniques. In addition, the effect of operating pressure, namely, 1 bar, 3 bar, 5 bar, and 7 bar, temperature (500–800 °C) was evaluated. The characterization results indicated that catalysts operated at 1 bar, gas hourly space velocity of 84000 (mL/g/h) gave the best catalytic performance. CH4 and CO2 conversions of 77 and 80% were obtained at 1 bar and at 700 °C reaction temperature. The increase of reaction temperatures from 500 °C to 800 °C increased the reaction rate and hence the methane and carbon dioxide conversions were increased. A unity ratio of H2/CO was obtained at 1 bar for temperatures 600 °C and above. Similarly, the time on stream tests, obtained at a 700 °C reaction temperature, showed that the best ratio in terms of the closeness of unity and the stable profile could be attained when the pressure was set to 1 bar. The TGA analysis showed the drop of mass due to oxidation of carbon deposits, which started at 500 °C. The catalyst operated at 1 bar produced the least amount of carbon, equivalent to 35% weight loss, while the 3 and 5 bar operated catalysts generated carbon formation, equivalent to 65% weight loss. However, the 7 bar operated catalyst resulted the highest accumulation of carbon formation, equivalent to 83% weight reduction. Hence, the TGA profile indicated the relative carbon deposition on the catalyst, which was dependent of the operated pressure and hence confirmed the suitability operation pressure of 1 bar. The characterizations of the Raman, EDX, TGA, and TPO all presented the formation of carbon.

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Design an in-situ reduction of Ni/C–SiO 2 catalyst and new insights into pretreatment effect for CH 4 –CO 2 reforming reaction

Cited by 19 publications

References 48 publications

A Well‐Defined Core–Shell‐Structured Capsule Catalyst for Direct Conversion of CO₂ into Liquefied Petroleum Gas

A Well‐Defined Core–Shell‐Structured Capsule Catalyst for Direct Conversion of CO₂ into Liquefied Petroleum Gas

Ni-Silica-based Catalysts for CH4 Reforming by CO2 with Enhanced Stability: Recent Designs and the Impacts of Ni Confinement, Promoters, and Core-Shell Structures

Effect of Pressure on Na0.5La0.5Ni0.3Al0.7O2.5 Perovskite Catalyst for Dry Reforming of CH4

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Design an in-situ reduction of Ni/C–SiO 2 catalyst and new insights into pretreatment effect for CH 4 –CO 2 reforming reaction

Cited by 19 publications

References 48 publications

A Well‐Defined Core–Shell‐Structured Capsule Catalyst for Direct Conversion of CO2 into Liquefied Petroleum Gas

A Well‐Defined Core–Shell‐Structured Capsule Catalyst for Direct Conversion of CO2 into Liquefied Petroleum Gas

Ni-Silica-based Catalysts for CH4 Reforming by CO2 with Enhanced Stability: Recent Designs and the Impacts of Ni Confinement, Promoters, and Core-Shell Structures

Effect of Pressure on Na0.5La0.5Ni0.3Al0.7O2.5 Perovskite Catalyst for Dry Reforming of CH4

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A Well‐Defined Core–Shell‐Structured Capsule Catalyst for Direct Conversion of CO₂ into Liquefied Petroleum Gas

A Well‐Defined Core–Shell‐Structured Capsule Catalyst for Direct Conversion of CO₂ into Liquefied Petroleum Gas