Recent Scientific Progress on Developing Supported Ni Catalysts for Dry (CO2) Reforming of Methane

Abstract

Two major green house gases (CO 2 and CH 4 ) can be converted into useful synthetic gas (H 2 and CO) during dry reforming of methane (DRM) reaction, and a lot of scientific efforts has been made to develop efficient catalysts for dry reforming of methane (DRM). Noble metal-based catalysts can effectively assist DRM reaction, however they are not economically viable. Alternatively, non-noble based catalysts have been studied so far, and supported Ni catalysts have been considered as a promising candidate for DRM catalyst. Main drawback of Ni catalysts is its catalytic instability under operating conditions of DRM (>700 • C). Recently, it has been demonstrated that the appropriate choice of metal-oxide supports can address this issue since the chemical and physical of metal-oxide supports can prevent coke formation and stabilize the small Ni nanoparticles under harsh conditions of DRM operation. This mini-review covers the recent scientific findings on the development of supported Ni catalysts for DRM reaction, including the synthetic methods of supported Ni nanoparticles with high sintering resistance.

Atomic Layer Deposition for Preparation of Highly Efficient Catalysts for Dry Reforming of Methane

“…It is interesting to note that coke formation was suppressed in the Ni nanoparticles confined in the mesopores, most likely due to the small nanoparticles with high curvature not showing high efficiency for two-dimensional graphitic carbon formation on Ni nanoparticles. This size-confinement effect on the catalytic activity and stability of Ni nanoparticles has been also reported elsewhere [27]. Recently, many scientific investigations were carried out to realize the effective incorporation of Ni nanoparticles inside porous substrates.…”

“…A variety of storage media such as porous materials including a metal-organic framework (MOF) or compounds with high CO 2 affinity such as CaO or MgO have been studied [4][5][6][7][8][9][10][11][12]. More recently, chemical conversion of CO 2 has been drawing more attention, since this process is not only able to contribute to the reduction of CO 2 levels in the atmosphere but also produces value-added products from CO 2 [2,[13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31].…”

“…The CO 2 chemical conversion can be considered as a possibility to store sustainable energy.Dry reforming of methane (DRM) uses CO 2 and CH 4 as reactants to produce CO and H 2 . This reaction is highly endothermic, typically operating at 800 • C or higher [27][28][29]. Once this reaction can operate with long-term stability, the efficient production of syngas (CO and H 2 ) from two major greenhouse gases (CO 2 and CH 4 ) can be realized.…”

Ce- and Y-Modified Double-Layered Hydroxides as Catalysts for Dry Reforming of Methane: On the Effect of Yttrium Promotion

“…Nickel-based catalysts have been widely studied, and they are considered to be a good alternative for expensive materials which contain noble metals. Moreover, Ni-catalysts were reported to be active and selective in dry reforming of methane, as presented in detailed by Seo et al [3]. However, the Ni-containing materials are known to suffer from deactivation due to sintering of the active phase, oxidation of nickel, and carbon formation [3,5].…”

“…From thermodynamics, it is well known that DRM starts to be favorable at ca. 700 • C [3,4]. While the operational conditions impose some challenges, there is still lack of a proper catalyst for such process in terms of reactivity and stability.…”