TY - JOUR

T1 - From alumina modified Rh/Ce0.75Zr0.25O2-δ catalyst towards composite Rh/Ce0.75Zr0.25O2-δ-ƞ-Al2O3/FeCrAl catalytic system for diesel conversion to syngas

AU - Shoynkhorova, T. B.

AU - Snytnikov, P. V.

AU - Simonov, P. A.

AU - Potemkin, D. I.

AU - Rogozhnikov, V. N.

AU - Gerasimov, E. Y.

AU - Salanov, A. N.

AU - Belyaev, V. D.

AU - Sobyanin, V. A.

PY - 2019/5/15

Y1 - 2019/5/15

N2 - It was investigated how the modification of Ce1-xZrxO2–δ with alumina as structural additive affected the surface characteristics of the support. The effect of alkaline promoters on the catalyst coking resistance and activity was studied. Sorption-hydrolytic deposition technique was used to prepare a set of catalysts containing 1 wt.% Rh deposited on Al2O3 - Ce0.75Zr0.25O2-δ, Ce0.75Zr0.25O2-δ and Al2O3 - Ce0.75Zr0.25O2-δ, doped with alkaline metal. The catalysts were characterized by BET, TEM, SEM, XRD, TPO, and CO chemisorption methods. It was proved that the catalysts contained high-dispersion Rh particles of size 1–2 nm. The presence of Al deteriorated catalytic activity of Rh/ Al2O3 - Ce0.75Zr0.25O2-δ for steam reforming of diesel surrogate (n-hexadecane) at T = 550 °C, H2O/C = 3.0, GHSV = 20,000 h−1, whereas the alkaline additives promoted n-hexadecane steam reforming. Rh/Ce0.75Zr0.25O2-δ appeared to be the most stable catalyst, as it provided 100% conversion of n-hexadecane during 15 h on stream. The active component Rh/Ce0.75Zr0.25O2-δ was supported on FeCrAl alloy wire mesh using alumina as a binding structural component. The obtained catalyst Rh/Ce0.75Zr0.25O2-δ-ƞ-Al2O3/FeCrAl was tested in the autothermal reforming of n-hexadecane at various temperatures and gas flow rates. Operating conditions were found to provide a 100% conversion of n-hexadecane and stable catalyst activity.

AB - It was investigated how the modification of Ce1-xZrxO2–δ with alumina as structural additive affected the surface characteristics of the support. The effect of alkaline promoters on the catalyst coking resistance and activity was studied. Sorption-hydrolytic deposition technique was used to prepare a set of catalysts containing 1 wt.% Rh deposited on Al2O3 - Ce0.75Zr0.25O2-δ, Ce0.75Zr0.25O2-δ and Al2O3 - Ce0.75Zr0.25O2-δ, doped with alkaline metal. The catalysts were characterized by BET, TEM, SEM, XRD, TPO, and CO chemisorption methods. It was proved that the catalysts contained high-dispersion Rh particles of size 1–2 nm. The presence of Al deteriorated catalytic activity of Rh/ Al2O3 - Ce0.75Zr0.25O2-δ for steam reforming of diesel surrogate (n-hexadecane) at T = 550 °C, H2O/C = 3.0, GHSV = 20,000 h−1, whereas the alkaline additives promoted n-hexadecane steam reforming. Rh/Ce0.75Zr0.25O2-δ appeared to be the most stable catalyst, as it provided 100% conversion of n-hexadecane during 15 h on stream. The active component Rh/Ce0.75Zr0.25O2-δ was supported on FeCrAl alloy wire mesh using alumina as a binding structural component. The obtained catalyst Rh/Ce0.75Zr0.25O2-δ-ƞ-Al2O3/FeCrAl was tested in the autothermal reforming of n-hexadecane at various temperatures and gas flow rates. Operating conditions were found to provide a 100% conversion of n-hexadecane and stable catalyst activity.

KW - Alumina

KW - Autothermal reforming

KW - Ceria-zirconia

KW - Diesel

KW - Hexadecane

KW - Hydrogen-rich stream

KW - Rhodium

KW - Steam conversion

KW - Structured catalyst

KW - Syngas

KW - Wire metal mesh

KW - DEPOSITION

KW - AL-BASED CATALYSTS

KW - GAMMA-AL2O3 LAYERS

KW - RH

KW - FUEL

KW - CERIA

UR - http://www.scopus.com/inward/record.url?scp=85058807386&partnerID=8YFLogxK

U2 - 10.1016/j.apcatb.2018.12.037

DO - 10.1016/j.apcatb.2018.12.037

M3 - Article

AN - SCOPUS:85058807386

VL - 245

SP - 40

EP - 48

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

SN - 0926-3373

ER -