A comparative study of ZrO2, Y2O3 and Sm2O3 promoted Ni/SBA-15 catalysts for evaluation of CO2/methane reforming performance

Taherian, Zahra; Yousefpour, Mardali; Tajally, Mohammad; Khoshandam, Behnam

doi:10.1016/j.ijhydene.2017.05.095

Cited by 69 publications

(27 citation statements)

References 38 publications

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“…No separate phase for yttrium was registered in XRD patterns, probably due to small amounts of this metal [3]. Moreover, according to Li et al [43] and Taherian et al [32] promotion with Y(NO3)3•6H2O resulted in Y2O3 phase formation which is not further unreducible in our tested conditions. The Ni° crystallite sizes calculated from the width of the reflection at 2q of ca.…”

Section: Catalysts Characterizationsupporting

confidence: 40%

“…Appropriate basicity provides good catalytic performance in dry reforming of methane, together with the suppression of carbon forming reactions. Moreover, a number of studies showed a positive effect of Y2O3 promotion on the rate of carbon removal due to oxygen vacancies, which induced oxygen radicals from CO2 to react with coke [32,38,43,56,57]. Thus, a possible removal of carbon could have taken place (to some extend) according to the reverse Boudouard reaction (Table 3) [43].…”

Section: Catalytic Tests Of Dry Reforming Of Methanementioning

confidence: 99%

“…Yttrium has received considerable attention as a promising promoter for many chemical processes [28][29][30][31][32][33], including dry reforming of methane [34][35][36][37]. Recently, yttrium promotion (0.2-0.6 wt%) was examined by us over Ni-based catalysts, which were additionally modified with Zr [33].…”

Section: Introductionmentioning

confidence: 99%

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Effect of low loading of yttrium on Ni-based layered double hydroxides in CO2 reforming of CH4

Świrk

Motak

Grzybek

et al. 2018

Reac Kinet Mech Cat

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Ni/Al/Mg layered double hydroxides (LDHs) modified with low loading of yttrium (0.2 and 0.4 wt%) were used in dry reforming of methane at 700 °C. Physicochemical characterization, such as: X-ray fluorescence, N2 sorption, X-ray diffraction, temperature programmed reduction in H2, temperature programmed desorption of CO2, H2 chemisorption, thermogravimetry analysis coupled by mass spectrometry and Raman spectroscopy, showed that the introduction of low loadings of yttrium lead to a smaller Niº crystallite size, a decrease in reducibility of the nickel, and a decreased number of basic sites in the modified Ni/LDHs catalysts. The doping with 0.4 wt% of Y improves catalytic activity resulting in higher CH4 and CO2 conversions at 700 °C, i.e. ca. 84 % and ca. 87 %, respectively with no clear deactivation observed after 5 h run. The increase in CO2 conversion and a decrease of H2/CO ratio indicates that side reactions occurs during DRM.

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Section: Catalysts Characterizationsupporting

confidence: 40%

Section: Catalytic Tests Of Dry Reforming Of Methanementioning

confidence: 99%

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Effect of low loading of yttrium on Ni-based layered double hydroxides in CO2 reforming of CH4

Świrk

Motak

Grzybek

et al. 2018

Reac Kinet Mech Cat

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“…Additionally, yttrium oxide has been studied as a support for DRM catalysts [34,35]. However, there are only a few literature reports describing the role of yttrium as a possible promoter in the DRM reaction [36][37][38][39]. Li et al [36] observed high resistance towards carbon deposition for Y-promoted Ni-SBA-15 catalysts, which was attributed to high dispersion of yttrium with nickel nanoparticles, and the ability of yttrium to create oxygen vacancies.…”

Section: Introductionmentioning

confidence: 99%

Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming

Świrk

Gálvez

Motak

et al. 2018

Journal of CO2 Utilization

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Yttrium modified Ni-based double-layered hydroxides were tested as novel catalysts in dry methane reforming. The catalysts were characterized by XRF, BET analysis, XRD, TPR-H 2 , TPD-CO 2 , TGA/DSC-MS, H 2 chemisorption and TEM. Co-precipitation with yttrium (III) nitrate hexahydrate resulted in increased specific surface area, smaller Ni crystallite size, enhanced reducibility, and higher distribution of weak and medium basic sites as compared to Y-free material. The DRM catalytic tests, carried out in the temperature range of 850-600 ºC, led to a significant improvement of activity, with the 1.5 wt % Y-promoted catalyst being the most efficient in converting both CH 4 and CO 2. Moreover, the 10 h test at 700 ºC further confirmed enhanced stability for this HTNi-Y1.5 catalyst. Higher CO 2 conversion than CH 4 conversion and less CO compared to H 2 proves that side reactions are occurring simultaneously.

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“…Conventional catalytic supports including Al 2 O 3 , MgO, TiO 2 , ZrO 2 , SiC, zeolites, and nanostructured carbons were frequently reported in the literature for DRM [24][25][26][27][28]. The combination of several metal oxides allowed improving catalytic performance [27,29,30]. However, up-to-date and to the best of our knowledge, there is not application of DRM at large industrial scale yet.…”

Section: Introductionmentioning

confidence: 99%

Hydroxyapatite supported bimetallic cobalt and nickel catalysts for syngas production from dry reforming of methane

Phan

Sane

Vasconcelos

et al. 2018

Applied Catalysis B: Environmental

139

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A B S T R A C T Hydroxyapatite (HAP, Ca 10 (PO 4 ) 6 (OH) 2 ) has all the criteria of a catalyst support, in particular its high thermal stability. However it is still less studied in the heterogeneous catalysis. For the first time, hydroxyapatite supported bimetallic Co-Ni catalysts were prepared and evaluated in the dry reforming of methane (DRM) process. Nanoparticles containing both nickel and cobalt were well formed on the surface of HAP by conventional impregnation methods. No modification of HAP structure was observed after metals deposition. DRM reaction was carried out at 700-750°C and around 1.6 bar, using a fixed-bed reactor which was fed with a mixture of 20%vol CH 4 , 20%vol CO 2 and 60%vol N 2 . CH 4 and CO 2 conversion reached up to 60 and 68% at 700°C, respectively, and 73 and 79% at 750°C, respectively during long reaction times of 50-160 h. Water as a by-product could be quantified along the catalytic reaction indicating the implication of reverse water-gas-shift reaction. TEM-EDX analysis of the used catalysts recovered after catalytic tests showed that coke deposition was limited and there was slight modification of metals particle size. The results obtained were very promising for the design of an efficient catalytic system for DRM process.

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A comparative study of ZrO2, Y2O3 and Sm2O3 promoted Ni/SBA-15 catalysts for evaluation of CO2/methane reforming performance

Cited by 69 publications

References 38 publications

Effect of low loading of yttrium on Ni-based layered double hydroxides in CO2 reforming of CH4

Effect of low loading of yttrium on Ni-based layered double hydroxides in CO2 reforming of CH4

Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming

Hydroxyapatite supported bimetallic cobalt and nickel catalysts for syngas production from dry reforming of methane

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