Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Effect of the support composition on the physicochemical properties of Ni/Ce1–xLaxOy catalysts and their activity in an autothermal methane reforming reaction. / Matus, E. V.; Nefedova, D. V.; Kuznetsov, V. V. и др.
в: Kinetics and Catalysis, Том 58, № 5, 09.2017, стр. 610-621.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Effect of the support composition on the physicochemical properties of Ni/Ce1–xLaxOy catalysts and their activity in an autothermal methane reforming reaction
AU - Matus, E. V.
AU - Nefedova, D. V.
AU - Kuznetsov, V. V.
AU - Ushakov, V. A.
AU - Stonkus, O. A.
AU - Ismagilov, I. Z.
AU - Kerzhentsev, M. A.
AU - Ismagilov, Z. R.
N1 - Publisher Copyright: © 2017, Pleiades Publishing, Ltd.
PY - 2017/9
Y1 - 2017/9
N2 - The effect of the Ce1–xLaxOy (x = 0–1, 1.5 ≤ y ≤ 2.0) support composition on the physicochemical properties of supported Ni catalysts and their activity in autothermal methane reforming was studied. The textural and structural characteristics of Ce1–xLaxOy and Ni/Ce1–xLaxOy samples and the process of their reduction in an atmosphere of hydrogen were examined using a set of techniques (low-temperature nitrogen adsorption, X-ray diffraction analysis, transmission electron microscopy, and thermal analysis). It was established that the Ce1–xLaxOy supports (x = 0–0.9) are mesoporous materials containing a fluorite-like solid solution based on cerium dioxide, in which the unit cell parameter increases and the average crystallite size decreases with the mole fraction of La. It was shown that the average size and composition of Ni-containing particles in the Ni/Ce1–xLaxOy catalysts depends on the composition of the support: at x = 0–0.8, a phase of NiO was formed, whereas a phase of LaNiO3 was formed at x = 0.9–1. The dispersity of the active constituent and its stability to agglomeration increased as the mole fraction of La in the Ce1–xLaxOy support was increased from 0 to 0.8, whereas the reduction of Ni-containing oxide particles shifted to the higher temperature region. The Ni/Ce1–xLaxOy catalysts provided high methane conversion (96–100%) and the yield of H2 (35–55%). The yield of hydrogen increased with decreasing the mole fraction of La in the Ce1–xLaxOy support composition; this can be caused by a decrease in the fraction of difficult-to-reduce Nin+ cations due to the weakening of metal–support interactions.
AB - The effect of the Ce1–xLaxOy (x = 0–1, 1.5 ≤ y ≤ 2.0) support composition on the physicochemical properties of supported Ni catalysts and their activity in autothermal methane reforming was studied. The textural and structural characteristics of Ce1–xLaxOy and Ni/Ce1–xLaxOy samples and the process of their reduction in an atmosphere of hydrogen were examined using a set of techniques (low-temperature nitrogen adsorption, X-ray diffraction analysis, transmission electron microscopy, and thermal analysis). It was established that the Ce1–xLaxOy supports (x = 0–0.9) are mesoporous materials containing a fluorite-like solid solution based on cerium dioxide, in which the unit cell parameter increases and the average crystallite size decreases with the mole fraction of La. It was shown that the average size and composition of Ni-containing particles in the Ni/Ce1–xLaxOy catalysts depends on the composition of the support: at x = 0–0.8, a phase of NiO was formed, whereas a phase of LaNiO3 was formed at x = 0.9–1. The dispersity of the active constituent and its stability to agglomeration increased as the mole fraction of La in the Ce1–xLaxOy support was increased from 0 to 0.8, whereas the reduction of Ni-containing oxide particles shifted to the higher temperature region. The Ni/Ce1–xLaxOy catalysts provided high methane conversion (96–100%) and the yield of H2 (35–55%). The yield of hydrogen increased with decreasing the mole fraction of La in the Ce1–xLaxOy support composition; this can be caused by a decrease in the fraction of difficult-to-reduce Nin+ cations due to the weakening of metal–support interactions.
KW - autothermal reforming
KW - cerium dioxide
KW - methane
KW - Ni catalysts
KW - synthesis gas
KW - SYNTHESIS GAS
KW - MIXED OXIDES
KW - PERFORMANCE
KW - SOLID-SOLUTIONS
KW - CO
KW - OF-THE-ART
KW - LA
KW - CERIA
KW - HYDROGEN-PRODUCTION
KW - PARTIAL OXIDATION
UR - http://www.scopus.com/inward/record.url?scp=85030653033&partnerID=8YFLogxK
U2 - 10.1134/S0023158417050160
DO - 10.1134/S0023158417050160
M3 - Article
AN - SCOPUS:85030653033
VL - 58
SP - 610
EP - 621
JO - Kinetics and Catalysis
JF - Kinetics and Catalysis
SN - 0023-1584
IS - 5
ER -
ID: 10067900