Hydrogen production by steam reforming of liquefied natural gas (LNG) over mesoporous nickel–alumina composite catalyst prepared by an anionic surfactant-templating method

Seo, Jeong Gil; Youn, Myung-Joong; Park, Sunyoung; Park, Dong Ryul; Chung, Jin Suk; Song, In Kyu

doi:10.1016/j.cattod.2008.12.008

Cited by 27 publications

(25 citation statements)

References 48 publications

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“…Among various nickel-based catalysts, it has been reported that nickel catalysts finely dispersed on the surface of mesoporous supports efficiently prohibited the carbon deposition and nickel sintering during the steam reforming reactions [15,17,18]. Therefore, mesoporous Ni-Al 2 O 3 catalysts have attracted much attention in order to achieve high nickel dispersion [18][19][20][21][22][23][24][25][26]. A large number of preparation methods such as sol-gel method [18,20], templating-method [6,24], impregnation method [17][18][19], and co-precipitation method [21,22,25] have been proposed for the preparation of mesoporous Ni-Al 2 O 3 catalysts with high nickel dispersion.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, mesoporous Ni-Al 2 O 3 catalysts have attracted much attention in order to achieve high nickel dispersion [18][19][20][21][22][23][24][25][26]. A large number of preparation methods such as sol-gel method [18,20], templating-method [6,24], impregnation method [17][18][19], and co-precipitation method [21,22,25] have been proposed for the preparation of mesoporous Ni-Al 2 O 3 catalysts with high nickel dispersion. Among these preparation methods, co-precipitation method has been considered as the most conventional technique for the preparation of mesoporous Ni-Al 2 O 3 catalysts due to its economic advantage, high reproducibility, and high homogeneity [25,26].…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Production by Steam Reforming of Liquefied Natural Gas over Mesoporous Ni-Al2O3 Catalysts Prepared by a Co-Precipitation Method: Effect of Ni/Al Atomic Ratio

et al. 2009

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Mesoporous Ni-Al 2 O 3 (XNiAl) catalysts with different Ni/Al atomic ratio (X) were prepared by a coprecipitation method for use in hydrogen production by steam reforming of liquefied natural gas (LNG). The effect of Ni/Al atomic ratio of mesoporous XNiAl catalysts on their physicochemical properties and catalytic activity for steam reforming of LNG was investigated. Physical properties of XNiAl catalysts did not show a consistent trend with respect to Ni/Al atomic ratio, while chemical properties of XNiAl catalysts strongly influenced by Ni/Al atomic ratio. Nickel species were highly dispersed on the surface of XNiAl catalysts through the formation of nickel aluminate phase or solid solution of nickel oxide and nickel aluminate phase. In the steam reforming of LNG, both LNG conversion and hydrogen composition in dry gas showed volcano-shaped curves with respect to Ni/Al atomic ratio. Nickel surface area of XNiAl catalysts was well correlated with LNG conversion and hydrogen composition over the catalysts. Among the catalysts tested, 0.8NiAl (Ni/Al = 0.8) catalyst with the highest nickel surface area showed the best catalytic performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrogen Production by Steam Reforming of Liquefied Natural Gas over Mesoporous Ni-Al2O3 Catalysts Prepared by a Co-Precipitation Method: Effect of Ni/Al Atomic Ratio

et al. 2009

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“…A mesoporous Pd-Al 2 O 3 was prepared by an anionic surfactant-templating method, according to the similar method reported in the literature [21]. About 3 g of anionic surfactant (lauric acid, Sigma-Aldrich) was dissolved in 30 ml of 1-propanol (Sigma-Aldrich) at room temperature under constant stirring to yield a micelle solution (Solution A).…”

Section: Preparation Of Pd-al 2 O 3 and Pd/al 2 O 3 Catalystsmentioning

confidence: 99%

“…A mesoporous alumina was prepared according to the reported method [21,22] for use as a supporting material for Pd catalyst. Preparation procedures for mesoporous alumina were almost identical to those of Pd-Al 2 O 3 , expect that palladium precursor was not used in the preparation of mesoporous alumina.…”

Section: Preparation Of Pd-al 2 O 3 and Pd/al 2 O 3 Catalystsmentioning

confidence: 99%

“…Average pore diameters of Pd-Al 2 O 3 and Pd/Al 2 O 3 catalysts were found to be 5.3 nm and 6.7 nm, respectively. The smaller average pore size of Pd-Al 2 O 3 catalyst is believed to be due to the incorporated Pd species which retarded the dehydroxylation and sintering reactions of alumina particles during the calcination step through the formation of Pd-O-Al composite structure[21].…”

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confidence: 99%

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Production of Middle Distillate from Synthesis Gas in a Dual-bed Reactor Through Hydrocracking of Wax Over Mesoporous Pd-Al2O3 Composite Catalyst

et al. 2009

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Production of middle distillate (C 10 -C 20 ) from synthesis gas (CO ? H 2 ) through hydrocracking of wax ([C 21? ) was carried out in a dual-bed reactor. Co/TiO 2 catalyst was used in the first-bed reactor to produce wax from synthesis gas, and a mesoporous Pd-alumina composite catalyst (Pd-Al 2 O 3 ) was used in the second-bed reactor to produce middle distillate through hydrocracking of wax. For comparison, a Pd catalyst supported on mesoporous alumina (Pd/Al 2 O 3 ) was also examined as a second-bed catalyst. The catalytic performance of PdAl 2 O 3 and Pd/Al 2 O 3 for hydrocracking of wax to middle distillate was tested and compared. It was revealed that selectivity for middle distillate in the dual-bed reactor was much higher than that in the first-bed reactor, indicating that both Pd-Al 2 O 3 and Pd/Al 2 O 3 catalysts in the secondbed reactor served as an efficient catalyst for hydrocracking of wax to middle distillate. Furthermore, Pd-Al 2 O 3 catalyst showed a higher selectivity for middle distillate than Pd/ Al 2 O 3 . The enhanced catalytic performance of Pd-Al 2 O 3 for hydrocracking of wax to middle distillate was due to high Pd dispersion and high Pd surface area. Large medium acidity of Pd-Al 2 O 3 catalyst was also responsible for its high catalytic performance in the hydrocracking of wax to middle distillate.

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Preparation of Cerium‐Doped Mesoporous γ‐Alumina Supported Nickel Catalysts for Pre–reforming of Liquefied Petroleum Gas under Low Steam to Carbon Ratio

et al. 2016

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Cerium‐doped mesoporous γ‐alumina supported nickel oxides (NiO/Ce–γ‐MA) were prepared via one‐pot hydrolysis of inorganic salts without surfactants and applied for pre‐reforming of liquefied petroleum gas (LPG) under a low steam to carbon molar ratio of 1.2. Influences of Ce contents on catalyst structure, interaction between Ni species and support, dispersion of nickel species and Ni particle sizes were investigated in detail. The NiO/Ce–γ‐MA materials possessed large surface areas and narrow pore size distributions with homogenously‐dispersed Ni oxide species in the matrices. Upon H2 reduction, uniform Ni crystallites were formed in the γ‐alumina frameworks. The addition of Ce could significantly promote the dispersion of nickel species and lower Ni crystallite sizes, improving the catalytic properties of the reduced Ni/Ce–γ‐MA catalyst. The Ni/Ce–γ‐MA catalyst containing 7 wt% Ce produced the smallest sub‐4‐nm Ni particles, resulting in the most excellent catalytic activity and stability with less than 1 wt% carbon deposition during the 100‐h reaction time for LPG pre‐reforming.

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Hydrogen production by steam reforming of liquefied natural gas (LNG) over mesoporous nickel–alumina composite catalyst prepared by an anionic surfactant-templating method

Cited by 27 publications

References 48 publications

Hydrogen Production by Steam Reforming of Liquefied Natural Gas over Mesoporous Ni-Al2O3 Catalysts Prepared by a Co-Precipitation Method: Effect of Ni/Al Atomic Ratio

Hydrogen Production by Steam Reforming of Liquefied Natural Gas over Mesoporous Ni-Al2O3 Catalysts Prepared by a Co-Precipitation Method: Effect of Ni/Al Atomic Ratio

Production of Middle Distillate from Synthesis Gas in a Dual-bed Reactor Through Hydrocracking of Wax Over Mesoporous Pd-Al2O3 Composite Catalyst

Preparation of Cerium‐Doped Mesoporous γ‐Alumina Supported Nickel Catalysts for Pre–reforming of Liquefied Petroleum Gas under Low Steam to Carbon Ratio

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