Carbon Formation during Methane Dry Reforming over Ni-Containing Ceria-Zirconia Catalysts

被引：22

作者：

Smal, Ekaterina ^{[1
]}

Bespalko, Yulia ^{[1
]}

Arapova, Marina ^{[1
]}

Fedorova, Valeria ^{[1
]}

Valeev, Konstantin ^{[1
]}

Eremeev, Nikita ^{[1
]}

Sadovskaya, Ekaterina ^{[1
]}

Krieger, Tamara ^{[1
]}

Glazneva, Tatiana ^{[1
]}

Sadykov, Vladislav ^{[1
]}

Simonov, Mikhail ^{[1
]}

机构：

[1] Boreskov Inst Catalysis, Dept Heterogeneous Catalysis, Novosibirsk 630090, Russia

来源：

NANOMATERIALS | 2022年 / 12卷 / 20期

基金：

俄罗斯科学基金会;

关键词：

methane dry reforming; carbon formation; supercritical synthesis; fluorite; heterogeneous catalysis; SUPPORTED NICKEL-CATALYSTS; SYNTHESIS GAS; PHOTOEMISSION-SPECTROSCOPY; PARTIAL OXIDATION; OXIDE CATALYSTS; ETHANOL; STEAM; CEO2; DEACTIVATION; PERFORMANCE;

D O I：

10.3390/nano12203676

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two series of Ni/Ce(Ti/Nb)ZrO2 catalysts were prepared using citrate route and original solvothermal continuous flow synthesis in supercritical isopropanol and studied in dry reforming of methane (DRM). TEM, XPS and FTIRS of adsorbed CO confirm influence of support composition and preparation method on the catalysts' morphology and surface features. The oxygen mobility was studied by isotope heteroexchange with (CO2)-O-18. After testing in DRM, carbon deposits after catalysts' testing in DRM were investigated by temperature-programmed oxidation with thermo-gravimetric analysis. The lowest amounts of carbon deposits were obtained for unmodified Ni-CeZr and Ni-CeNbZr compositions. Ti addition lead to an increased amount of carbon, which was removed at higher temperatures. The use of supercritical supports also resulted in the formation of a higher amount of coke. Catalysts prepared by the supercritical synthesis were tested in DRM for 25 h. The highest activity drop was observed in the first three hours. For all compositions, close values of carbon deposits were revealed.

引用

页数：23

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