Nickel–silica core@shell catalyst for methane reforming

Majewski, Artur; Wood, Joseph; Bujalski, W.

doi:10.1016/j.ijhydene.2013.09.017

Cited by 96 publications

(65 citation statements)

References 42 publications

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“…Ni-based catalysts have been used and widely studied in methane reforming because of their high catalytic activity and low price [16][17][18][19][20][21][22][23][24]. But under long exposure [44], co-precipitation [45], deposition-precipitation [46], combustion [47,48], sol-gel [49], surfactant assisted and polyol [50] methods. The use of methods which provide the realization of a strong metal-support interaction has positive effect on the long-term stability of catalysts in hydrocarbon reforming processes [51,52].…”

Section: Introductionmentioning

confidence: 99%

Application of POSS Nanotechnology for Preparation of Efficient Ni Catalysts for Hydrogen Production

Исмагилов

Матус

Kuznetsov

et al. 2017

Eurasian Chem. Tech. J.

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POSS (polyhedral oligomeric silsesquioxanes) nanotechnology was applied for preparation of efficient Ni catalysts for hydrogen production through autothermal reforming of methane (ATR of CH 4 ). The novel metal-POSS precursor [Nickel (II) -HeptaisobutylPOSS (C 4 H 9 ) 7 Si 7 O 9 (OH)O 2 Ni] of Ni nanoparticles was introduced into Ce 0.5 Zr 0.5 O 2 support with following calcination and reduction stages of activation. The peculiarity of the genesis of Ni/SiO 2 /Ce 0.5 Zr 0.5 O 2 nanomaterials and their characteristics versus deposition mode were studied by X-ray fluorescence spectroscopy, thermal analysis, N 2 adsorption, X-ray diffraction, high-resolution transmission electron microscopy and H 2 temperature-programmed reduction. The two kinds of supported Ni-containing particles were observed: highly dispersed Ni forms (1-2 nm) and large Ni-containing particles (up to 50-100 nm in size). It was demonstrated that the textural, structural, red-ox and, consequently, catalytic properties of ex-Ni-POSS catalysts depend on the deposition mode. The increase of a portion of difficultly reduced Ni 2+ species is found upon application of intermediate calcination during Ni-POSS deposition that has detrimental effect on the activity of catalyst in ATR of CH 4 . The Ni/SiO 2 /Ce 0.5 Zr 0.5 O 2 catalyst prepared by one-step Ni-POSS deposition exhibits the highest H 2 yield -80% at T = 800 °C.

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Section: Introductionmentioning

confidence: 99%

Application of POSS Nanotechnology for Preparation of Efficient Ni Catalysts for Hydrogen Production

Исмагилов

Матус

Kuznetsov

et al. 2017

Eurasian Chem. Tech. J.

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“…Steam methane reforming is the most common process for the production of hydrogen and synthesis gas, but catalyst deactivation may occur during methane steam reforming with Ni catalysts since it promotes carbon deposition over the catalyst [4]. De Miguel et al [5] used an Ni-Al 2 O 3 catalyst for methane steam reforming.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Performance of Coal Char for the Methane Reforming Process

Sun

et al. 2014

Chem Eng & Technol

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A new concept of combined coal gasification and methane reforming in a single reactor was proposed as an alternative path for syngas production using coal and coalbed methane. Here, the results of this process are summarized. The experimental work was carried out in a fixed-bed reactor. Methane cracking, CO 2 /steam reforming of methane over coal char, and the effects of chars made from different types of parent coal on methane conversion were examined. The catalytic effect of coal char on methane cracking and reforming increased with decreasing coalification degree. A synergistic effect was observed in that, while the coal char catalyzed the methane reforming reactions, gasification of the coal char took place simultaneously, which counter-balanced the deposition of carbon especially for the methane-steam-char system.

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“…Amorf yapıdaki silikat (SiO 2 ) yüksek sıcaklıklarda yüksek yapısal kararlılığa sahip olması nedeniyle katalizör sentezinde destek maddesi olarak kullanıma uygundur. SiO 2 'nin, kimyasal ve biyolojik olarak inert olması, içinde barındırdığı aktif madde için etkili bir koruma ortamı oluşturmaktadır [1,6]. Mezogözenekli mikro küreler izole bir ortamda formunu koruyan "emülsiyon damlacıkları" vasıtasıyla oluşurlar.…”

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“…Katalizör uygulamalarında mikro küreler aktif madde için bir taşıyıcı görevi görmektedirler. Aktif madde uygulanan sentez koşuluna bağlı olarak mikro kürenin merkezinde veya kenarlarına yakın kısımlarında yer alabilmektedir [6,10]. Aktif madde için pek çok seçenek söz konusudur.…”

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