Ni-based SBA-15 catalysts modified with CeMnOx for CO2 valorization via dry reforming of methane: Effect of composition on modulating activity and H2/CO ratio
Dry reforming of methane with ratio CH4/CO2 = 1 is studied using supported Ni catalysts on SBA-15 modified by CeMnOx mixed oxides with different Ce/Mn ratios (0.25, 1 and 9). The obtained samples are characterized by wide-angle XRD, SAXS, N2 sorption, TPR-H2, TEM, UV-vis and Raman spectroscopies. Th...
| Published in: | Nanomaterials Vol. 13, № 19. P. 2641 (1-20) |
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| Other Authors: | , , , , , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Online Access: | http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001139652 Перейти в каталог НБ ТГУ |
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| 245 | 1 | 0 | |a Ni-based SBA-15 catalysts modified with CeMnOx for CO2 valorization via dry reforming of methane: Effect of composition on modulating activity and H2/CO ratio |c M. V. Grabchenko, N. V. Dorofeeva, V. A. Svetlichnyi [et al.] |
| 336 | |a Текст | ||
| 337 | |a электронный | ||
| 504 | |a Библиогр.: 52 назв. | ||
| 520 | 3 | |a Dry reforming of methane with ratio CH4/CO2 = 1 is studied using supported Ni catalysts on SBA-15 modified by CeMnOx mixed oxides with different Ce/Mn ratios (0.25, 1 and 9). The obtained samples are characterized by wide-angle XRD, SAXS, N2 sorption, TPR-H2, TEM, UV-vis and Raman spectroscopies. The SBA-15 modification with CeMnOx decreases the sizes of NiO nanoparticles and enhances the NiO-support interaction. When Ce/Mn = 9, the NiO forms small particles on the surface of large CeO2 particles and/or interacts with CeO2, forming mixed phases. The best catalytic performance (at 650 C, CH4 and CO2 conversions are 51 and 69%, respectively) is achieved over the Ni/CeMnOx/SBA-15 (9:1) catalyst. The peculiar CeMnOx composition (Ce/Mn = 9) also improves the catalyst stability: In a 24 h stability test, the CH4 conversion decreases by 18 rel.% as compared to a 30 rel.% decrease for unmodified catalyst. The enhanced catalytic stability of Ni/CeMnOx/SBA-15 (9:1) is attributed to the high concentration of reactive peroxo (O-) and superoxo (O2-) species that significantly lower the amount of coke in comparison with Ni-SBA-15 unmodified catalyst (weight loss of 2.7% vs. 42.2%). Ni-SBA-15 modified with equimolar Ce/Mn ratio or Mn excess is less performing. Ni/CeMnOx/SBA-15 (1:4) with the highest content of manganese shows the minimum conversions of reagents in the entire temperature range (X(CO2) = 4-36%, X(CH4) = 8-58%). This finding is possibly attributed to the presence of manganese oxide, which decorates the Ni particles due to its redistribution at the preparation stage. | |
| 653 | |a конверсия метана | ||
| 653 | |a рамановская спектроскопия | ||
| 653 | |a сухой риформинг метана | ||
| 655 | 4 | |a статьи в журналах |9 962107 | |
| 700 | 1 | |a Grabchenko, Maria V. |9 433843 | |
| 700 | 1 | |a Dorofeeva, Nataliya V. |9 146551 | |
| 700 | 1 | |a Svetlichnyi, Valerii A. |9 562988 | |
| 700 | 1 | |a Larichev, Yurii V. |9 962108 | |
| 700 | 1 | |a La Parola, Valeria |9 500568 | |
| 700 | 1 | |a Liotta, Leonarda Francesca |9 917603 | |
| 700 | 1 | |a Kulinich, Sergei A. |9 503884 | |
| 700 | 1 | |a Vodyankina, Olga V. |9 36805 | |
| 773 | 0 | |t Nanomaterials |d 2023 |g Vol. 13, № 19. P. 2641 (1-20) |x 2079-4991 | |
| 852 | 4 | |a RU-ToGU | |
| 856 | 4 | |u http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001139652 | |
| 856 | |y Перейти в каталог НБ ТГУ |u https://koha.lib.tsu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=1139652 | ||
| 908 | |a статья | ||
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