Hydrogen production by autothermal reforming of methane: Effect of promoters (Pt, Pd, Re, Mo, Sn) on the performance of Ni/La2O3 catalysts

Исмагилов, И.З.; Матус, Е. В.; Kuznetsov, V. Ya.; Mota, N.; Navarro, R.M.; Yashnik, S. A.; Prosvirin, Igor P.; Керженцев, М. А.; Исмагилов, З. Р.; Fierro, J.L.G.

doi:10.1016/j.apcata.2014.04.042

Cited by 45 publications

(25 citation statements)

References 66 publications

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“…An alternative way to overcome the above disadvantages implies the promotion of nickel catalysts by noble metal additives, whose concentrations are no higher than 0.5 wt % [10][11][12].…”

Section: Effect Of Support Modification On the Physicochemical Propermentioning

confidence: 99%

Effect of support modification on the physicochemical properties of a NiPd/Al2O3 catalyst for the autothermal reforming of methane

et al. 2015

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For the development of effective catalysts for the autothermal reforming of methane, the NiPd catalysts were synthesized based on modified aluminum oxide and their physicochemical properties were studied using X ray diffraction analysis, low temperature nitrogen adsorption, transmission electron micros copy, and temperature programmed reduction with hydrogen. It was found that the variation of modifying components (CeO 2 , ZrO 2 , La 2 O 3 , Ce 0.5 Zr 0.5 O 2 , and La 2 O 3 /Ce 0.5 Zr 0.5 O 2 ) and their concentrations (10-30 wt %) makes it possible to regulate the particle size of NiO, the composition of a Ni containing phase (NiO, La 2 NiO 4 , NiAl 2 O 4 , or Ni-La-Al-O) and the redox properties of nickel ions. It was shown that the average particle size of NiO increased from 6.7 to 17.5 nm in the following order of supports: . On the introduction of the modifying oxides CeO 2 and ZrO 2 into aluminum oxide, the fraction of nickel in the composition of NiAl 2 O 4 decreased and, therefore, the fraction of difficult to reduce Ni 2+ decreased. The addition of La 2 O 3 and La 2 O 3 /Ce 0.5 Zr 0.5 O 2 strengthened the interaction of nickel cations with the support up to the formation of Ni-La-Al-O and La 2 NiO 4 phases and increased the fraction of difficult to reduce Ni 2+ ions. The resulting NiPd catalysts are promising in the catalysis of the autothermal reforming of methane.

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“…An alternative way to overcome the above disadvantages implies the promotion of nickel catalysts by noble metal additives, whose concentrations are no higher than 0.5 wt % [10][11][12].…”

Section: Effect Of Support Modification On the Physicochemical Propermentioning

confidence: 99%

Effect of support modification on the physicochemical properties of a NiPd/Al2O3 catalyst for the autothermal reforming of methane

et al. 2015

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“…Thus, the development of processes for the conversion of methane, which is the main component of natural gas and associated petroleum gas, into base products and half finished petroleum chemistry prod ucts is a problem of considerable current interest. Different methods were proposed for converting methane into economic value added products [4][5][6][7][8][9][10][11][12][13][14][15][16]. The oxidative condensation of methane (OCM) is con sidered as an effective method for the direct conversion of methane into the С 2 hydrocarbons-ethane and ethy lene [1,[5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Oxidative condensation of methane in the presence of modified MnNaW/SiO2 catalysts

et al. 2015

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The effects of cationic (Ce, Zr, and La) and anionic (S, P, and Cl) admixtures on the activity and physicochemical properties of MnNaW/SiO 2 were studied in order to optimize the composition of a catalyst for the oxidative condensation of methane (OCM). It was found that OCM process characteristics can be reg ulated by varying the type (Ce, Zr, La, S, P, and Cl) and concentration (0.5-5 wt %) of a modifying admix ture. For the modified MnNaW/SiO 2 catalysts, the yield of the target reaction products increased in the fol lowing order of modifying admixtures: S < Zr < P < Ce < La < Cl. The addition of lanthanum, cerium, or phosphorus admixtures insignificantly affected the activity of the MnNaW/SiO 2 catalyst, whereas the intro duction of sulfur or zirconium led to a decrease in the yield of C 2 hydrocarbons. Modification with chlorine improved process characteristics and shifted a maximum yield of C 2 hydrocarbons to the low temperature region. It was established that the introduction of lanthanum considerably improved the stability of catalyst operation. The catalyst composition 2Mn-1.6Na-3.1W-2La/SiO 2 was developed to afford a 22% yield of target C 2 hydrocarbons at a 54% conversion of methane after a 24 h reaction performed under optimum conditions (reaction temperature, 800°C; reaction mixture flow rate, 117 mL min -1 and O 2 /CH 4 molar ratio, 0.5).

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“…quartz fixed-bed reactor with a feed composition of CH 4 :H 2 O:O 2 :He equal to 1:1:0.75:2.5 under atmospheric pressure and temperatures ranging from 650 to 950˝C and inlet gas flow rate of 200 mL N /min. More information on the tests carried out for the selection of the support material and the promoters for the reactions can be found in the works of Ismagilov et al [14,15]. In order to obtain the desired properties of the catalyst support, a deep characterization of fresh and used samples of all catalytic series prepared was performed, where the main structural and surface characteristics of the catalysts that have strong influence on the ATR catalytic activity and stability were identified.…”

Section: Atr Catalystmentioning

confidence: 99%

“…Table 2. Compliance of ATR catalyst developed in DEMCAMER with the requirements of activity, selectivity and durability [14,15]. Once the catalysts was designed and tested under reacting conditions, the stability of MIEC membranes was also investigated for selective feeding of O2 in the reactor.…”

Section: Autothermal Reforming Of Methanementioning

confidence: 99%

Process Intensification via Membrane Reactors, the DEMCAMER Project

et al. 2016

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This paper reports the findings of a FP7 project (DEMCAMER) that developed materials (catalysts and membranes) and new processes for four industrially relevant reaction processes. In this project, active, stable, and selective catalysts were developed for the reaction systems of interest and their production scaled up to kg scale (TRL5 (TRL: Technology Readiness Level)). Simultaneously, new membranes for gas separation were developed; in particular, dense supported thin palladium-based membranes for hydrogen separation from reactive mixtures. These membranes were successfully scaled up to TRL4 and used in various lab-scale reactors for water gas shift (WGS), using both packed bed and fluidized bed reactors, and Fischer-Tropsch (FTS) using packed bed reactors and in prototype reactors for WGS and FTS. Mixed ionic-electronic conducting membranes in capillary form were also developed for high temperature oxygen separation from air. These membranes can be used for both Autothermal Reforming (ATR) and Oxidative Coupling of Methane (OCM) reaction systems to increase the efficiency and the yield of the processes. The production of these membranes was scaled up to TRL3-4. The project also developed adequate sealing techniques to be able to integrate the different membranes in lab-scale and prototype reactors.

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Hydrogen production by autothermal reforming of methane: Effect of promoters (Pt, Pd, Re, Mo, Sn) on the performance of Ni/La2O3 catalysts

Cited by 45 publications

References 66 publications

Effect of support modification on the physicochemical properties of a NiPd/Al2O3 catalyst for the autothermal reforming of methane

Effect of support modification on the physicochemical properties of a NiPd/Al2O3 catalyst for the autothermal reforming of methane

Oxidative condensation of methane in the presence of modified MnNaW/SiO2 catalysts

Process Intensification via Membrane Reactors, the DEMCAMER Project

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