Highly dispersed Rh/Ce0.75Zr0.25O2-δ-ƞ-Al2O3/FeCrAl wire mesh catalyst for autothermal n-hexadecane reforming

Shoynkhorova, T.B.; Rogozhnikov, V.N.; Simonov, P.A.; Snytnikov, P.V.; Саланов, А. Н.; Куликов, А. В.; Gerasimov, E. Yu.; Belyaev, V. D.; Потемкин, Д.И.; Sobyanin, V. A.

doi:10.1016/j.matlet.2017.12.017

Cited by 24 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rh particles, prepared through sorption-hydrolytic deposition, on Ce 0.75 Zr 0.25 O 2−δ mixed with alumina powder show 100% conversion during the first 6 h on-stream that afterward decreases following carbon deposition. When supported on FeCrAl, it achieved 100% conversion for 12 h without forming coke on the surface 282. Ni/Ce 0.75 Zr 0.25 O 2 washcoated on FeCrAl foams autothermally reform iso-octane in stainless steel and quartz microreactors.…”

mentioning

confidence: 99%

FeCrAl as a Catalyst Support

et al. 2020

View full text Add to dashboard Cite

The iron-chromium-aluminum alloy (FeCrAl) is an exceptional support for highly exothermic and endothermic reactions that operate above 700 °C in chemically aggressive environments, where low heat and mass transfer rates limit reaction yield. FeCrAl two-and three-dimensional structured networksmonoliths, foams, and fibersmaximize mass transfer rates, while their remarkable thermal conductivity minimizes hot spots and thermal gradients. Another advantage of the open FeCrAl structure is the low pressure drop due to the high void fraction and regularity of the internal path. The surface Al 2 O 3 layer, formed after an initial thermal oxidation, supports a wide range of metal and metal oxide active phases. The aluminum oxide that adheres to the metal surface protects it from corrosive atmospheres and carbon (carburization), thus allowing FeCrAl to operate at a higher temperature. The top applications are industrial burners, in which compact knitted metal fibers distribute heat over large surface areas, and automotive tail gas converters. Future applications include producing H 2 and syngas from remote natural gas in modular units. This Review summarizes the specific preparation techniques, details process operating conditions and catalyst performance of several classes of reactions, and highlights positive and challenging aspects of FeCrAl.

show abstract

mentioning

confidence: 99%

FeCrAl as a Catalyst Support

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The carbon formation can be resolved from the catalyst by construction modification. To avoid homogeneous cracking and coking of hydrocarbons, highly active metals should be chosen [ 12 , 13 ]. Noble metals such as platinum (Pt), rhodium (Rh), and palladium (Pd) have been widely investigated due to their superior performance, but their high prices restrain their application [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Stability and Activity of Rhodium Promoted Nickel-Based Catalysts in Dry Reforming of Methane

et al. 2023

View full text Add to dashboard Cite

The rhodium oxide (Rh2O3) doping effect on the activity and stability of nickel catalysts supported over yttria-stabilized zirconia was examined in dry reforming of methane (DRM) by using a tubular reactor, operated at 800 °C. The catalysts were characterized by using several techniques including nitrogen physisorption, X-ray diffraction, transmission electron microscopy, H2-temperature programmed reduction, CO2-temperature programmed Desorption, and temperature gravimetric analysis (TGA). The morphology of Ni-YZr was not affected by the addition of Rh2O3. However, it facilitated the activation of the catalysts and reduced the catalyst’s surface basicity. The addition of 4.0 wt.% Rh2O3 gave the optimum conversions of CH4 and CO2 of ~89% and ~92%, respectively. Furthermore, the incorporation of Rh2O3, in the range of 0.0–4.0 wt.% loading, enhanced DRM and decreased the impact of reverse water gas shift, as inferred by the thermodynamics analysis. TGA revealed that the addition of Rh2O3 diminished the carbon formation on the spent catalysts, and hence, boosted the stability, owing to the potential of rhodium for carbon oxidation through gasification reactions. The 4.0 wt.% Rh2O3 loading gave a 12.5% weight loss of carbon. The TEM images displayed filamentous carbon, confirming the TGA results.

show abstract

“…As with almost all chemical processes, the choice of a suitable ATR catalyst is decisive for the complete conversion of carbonaceous feedstocks and promising long-term stability. In the relevant literature, Rh, Pt, Ru, Ir and Ni are deposited on different washcoats such as Al2O3, SiO2, CeO2, ZrO2 or perovskites, and have been found to best fulfill the requirements of high activity and stability [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]. High activity and stability, however, are threatened by the above-mentioned coke deposits and, additionally, by adsorbing sulfur-and phosphorouscontaining components, which might block the catalytically-active sites on the catalyst surface being no longer accessible for the reactants.…”

Section: Introductionmentioning

confidence: 99%