Preparation of Ni/MgO catalyst for CO2 reforming of methane by dielectric-barrier discharge plasma

Wei, Hua; Jin, Lijun; He, Xinfu; Liu, Jiahe; Hu, Haoquan

doi:10.1016/j.catcom.2010.04.007

Cited by 66 publications

(35 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This indicates that during plasma operation, catalyst surfaces might be modified differently depending on the relative position of the plasma and the catalyst. These modifications, due to the dual effect of plasma discharges and temperature, could results to enhance the dispersion of active catalytic components [41], modify the oxidation state of the material [42,43], and enhance the specific surface area or change of catalytic structure [44]. Consequently, the CH 4 conversion is affected.…”

Section: Plasma and Plasma-catalytic Oxidation Of Methanementioning

confidence: 98%

Plasma-catalytic hybrid reactor: Application to methane removal

et al. 2015

View full text Add to dashboard Cite

Section: Plasma and Plasma-catalytic Oxidation Of Methanementioning

confidence: 98%

Plasma-catalytic hybrid reactor: Application to methane removal

et al. 2015

View full text Add to dashboard Cite

“…[113] This means that, at the same activity, the reaction temperatures can be 50 to 100 K lower. [96] It has also been employed to remove the organic template molecules for the syntheses of various molecular sieves, [116] which is very promising for the future preparation of the molecular sieve supported Ni catalysts (like simultaneous decomposition of Ni precursor and organic template). The thermal effect can be ignored for plasma treatment that uses glow discharge and dielectric-barrier discharge, which are operated at near room temperature (so-called cold plasmas).…”

Section: Preparation Methods Effectsmentioning

confidence: 99%

“…The plasmas applied include plasma jet, [112] glow discharge, [113] thermal plasma chemical vapor deposition by means the solution plasma spraying method, [114] and dielectric-barrier discharge. [96,116] The above-mentioned plasma techniques have been commercially employed to produce semiconductor materials, nitride, ozone, carbon black, and many others. The smaller size, narrow size distribution, and enhanced metal-support interaction produced by using plasma treatment have been considered as the reasons for the significantly enhanced coke resistance property of Ni catalysts for CO 2 reforming [112,113] and steam reforming.…”

Section: Preparation Methods Effectsmentioning

confidence: 99%

“…In this regard, NiO/MgO solid solution shows an excellent thermal stability. Hu et al [96] reported an effect of the preparation methods on NiO-MgO catalyst for CO 2 reforming. [9, 19-21, 95, 96] For example, the reduced 20 wt.…”

Section: Solid Solutionsmentioning

confidence: 99%

“…The reduction of "free" NiO entities that were not incorporated into the Ni x Mg 1Àx O solid solution leads to deactivation of the catalyst. Hu et al [96] reported an effect of the preparation methods on NiO-MgO catalyst for CO 2 reforming. They confirmed too that the size of nickel particles has a significant influence.…”

Section: Solid Solutionsmentioning

confidence: 99%

See 2 more Smart Citations

Progresses in the Preparation of Coke Resistant Ni‐based Catalyst for Steam and CO₂ Reforming of Methane

et al. 2011

View full text Add to dashboard Cite

Steam reforming of methane is an extremely important process for the hydrogen and syngas production. Nickel‐based catalysts have been extensively employed in the industrial process of steam reforming because of their high activity, low cost, and the plentiful supply of Nickel. Nickel‐based catalysts have also shown high activity for CO2 reforming of methane, which has been considered as a good option, with consumption of a significant amount of carbon dioxide. However, a major challenge is that Ni catalysts have a high thermodynamic potential for coke formation during reforming reactions. For steam reforming, coke formation induces deactivation of the catalyst, especially if the carbon forms as carbon filaments. The filamentous carbon material has a high mechanical strength and can cause mechanical deformation of the catalyst. For CO2 reforming, coke formation over Ni catalyst is even more serious and leads to rapid deactivation of the catalyst. It is highly desired to design and synthesize a coke resistant Ni catalyst not only for reforming of methane, but also for reforming of other hydrocarbons (including biomass derived hydrocarbons). Herein we summarize the very recent progresses in the design, synthesis, and characterization of coke resistant Ni catalysts for steam and CO2 reforming of methane. The progresses in the use of promoters, in the effect of supporting materials and in the preparation methods have been discussed. The thermal stability, regeneration, and future development of coke resistant Ni catalysts for these processes are also briefly addressed.

show abstract

Employing a Nickel‐Containing Supramolecular Framework as Ni Precursor for Synthesizing Robust Supported Ni Catalysts for Dry Reforming of Methane

Zhao

Guo

et al. 2016

ChemCatChem

View full text Add to dashboard Cite

This work presents a facile and efficient approach for preparing well dispersed supported Ni catalyst (HMA@Ni/SBA‐15) for dry reforming of methane (DRM) through the modified impregnation method by using a hexamethylenetetramine (HMA) Ni(II) complex, a three‐dimensional hydrogen‐bonded supramolecular framework, as Ni precursor. By employing this method, the NiII cation was discretely impregnated into the mesoporous channels of SBA‐15 support by the “obstacle effect” of the HMA coordination shell of the Ni complex; and then the Ni nanoparticles were stabilized inside the mesoporous channels of SBA‐15 by the confinement effect. The developed HMA@Ni/SBA‐15 catalyst demonstrated much higher catalytic activity and much better catalytic stability than the traditional Ni/SBA‐15 towards this reaction. The superior catalytic activity was suggested to be associated with the enhanced Ni dispersion and the improved reduction degree of NiO. In addition, the confinement effect of mesopore channels and strengthened interaction between Ni and support by improved Ni dispersion contributed to stabilizing Ni particles during the reduction and reaction process at high temperature. The strengthened Ni–support interaction of HMA@Ni/SBA‐15 favored the formation of whisker‐like carbon, which did not depress the accessibility of Ni active sites. However, owing to the weaker Ni–support interaction, the clearly observed shell‐like carbon closely encapsulated on Ni nanoparticles of spent Ni/SBA‐15 would significantly depress the accessibility of Ni active sites to reactants. The combination of stabilized Ni nanoparticles and well‐kept Ni accessibility of HMA@Ni/SBA‐15 catalyst allows it to show outstanding catalytic stability for DRM reaction. The much superior catalytic activity and stability of the developed HMA@Ni/SBA‐15 catalyst to the traditional Ni/SBA‐15 make it a promising candidate for producing synthesis gas through DRM reaction.

show abstract

Preparation of Ni/MgO catalyst for CO2 reforming of methane by dielectric-barrier discharge plasma

Cited by 66 publications

References 22 publications

Plasma-catalytic hybrid reactor: Application to methane removal

Plasma-catalytic hybrid reactor: Application to methane removal

Progresses in the Preparation of Coke Resistant Ni‐based Catalyst for Steam and CO₂ Reforming of Methane

Employing a Nickel‐Containing Supramolecular Framework as Ni Precursor for Synthesizing Robust Supported Ni Catalysts for Dry Reforming of Methane

Contact Info

Product

Resources

About

Preparation of Ni/MgO catalyst for CO2 reforming of methane by dielectric-barrier discharge plasma

Cited by 66 publications

References 22 publications

Plasma-catalytic hybrid reactor: Application to methane removal

Plasma-catalytic hybrid reactor: Application to methane removal

Progresses in the Preparation of Coke Resistant Ni‐based Catalyst for Steam and CO2 Reforming of Methane

Employing a Nickel‐Containing Supramolecular Framework as Ni Precursor for Synthesizing Robust Supported Ni Catalysts for Dry Reforming of Methane

Contact Info

Product

Resources

About

Progresses in the Preparation of Coke Resistant Ni‐based Catalyst for Steam and CO₂ Reforming of Methane