Highly dispersed Rh-, Pt-, Ru/Ce0.75Zr0.25O2–δ catalysts prepared by sorption-hydrolytic deposition for diesel fuel reforming to syngas

Shoynkhorova, T.B.; Simonov, P.A.; Потемкин, Д.И.; Snytnikov, P.V.; Belyaev, V. D.; Ищенко, А. В.; Svintsitskiy, Dmitry A.; Sobyanin, V. A.

doi:10.1016/j.apcatb.2018.06.003

Cited by 83 publications

(29 citation statements)

References 36 publications

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“…The diffraction peaks for the Rh metal phase are not detectable in its XRD data because its average crystalline size is smaller than the detection limit of our XRD (i.e., ≈4 nm). [ 28 ] Figure 2B,C shows the XRD data of 5 wt% Rh/CZ after running it for the 24 h ESR test using the S/C ratio of 3.1 at 600 and 800 °C, respectively. According to their XRD data, no additional peaks corresponding to the graphite phase could be identiﬁed (i.e., no diffraction peak at 2Θ = 26°) within the sensitivity of the XRD measurement.…”

Section: Resultsmentioning

confidence: 99%

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Internal Reforming Solid Oxide Fuel Cell System Operating under Direct Ethanol Feed Condition

et al. 2020

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A button‐typed single solid oxide fuel cell (SOFC) with an internal catalytic reforming layer is tested for direct‐fed ethanol SOFC technology. This catalytic functional layer consists of 5 wt% Rh/CeZrO2 catalyst and is applied in front of conventional nickel–yttria–stabilized zirconia (Ni–YSZ) anode to convert the ethanol fuel (35 vol%) into a hydrogen‐rich gas stream via the ethanol steam reforming reaction under harsh operating conditions for 24 h (steam‐to‐carbon [S/C] ratio = 3.1, 600 °C, and weight hourly space velocity [WHSV] of 176 h−1). The X‐ray powder diffraction (XRD) analysis and transmission electron microscopy (TEM) images reveal highly dispersed Rh nanoparticles with an average size of 2 nm over CeZrO2 support. Unlike the button cell without the catalytic functional layer, the electrochemical performance of the button cell with the catalytic functional layer illustrates a high coking resistance while maintaining a good power density output. The proposed SOFC with the catalytic functional layer is a viable solution for future electric cars with bioethanol‐fed SOFC technology.

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Section: Resultsmentioning

confidence: 99%

“…If the graphite carbon forms during the ESR test, then a strong XRD diffraction peak shows up at 2Θ = 26.6°. [ 28 ] However, its XRD data shows no graphitic carbon at 2Θ = 26.6°. Furthermore, its TEM image still shows small Rh metal nanoparticles with an average size of 2.3 nm at 600 °C and 3.2 nm at 800 °C with no carbon dispositions.…”

Section: Resultsmentioning

confidence: 99%

Internal Reforming Solid Oxide Fuel Cell System Operating under Direct Ethanol Feed Condition

et al. 2020

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“…In our earlier works we suggested to use highly heat-resisting (up to 1350°C) FeCrAl alloy materials in a form of meshes and foams as a heat-conducting structural carrier of the catalysts for the reactions of complete and partial oxidation of gaseous hydrocarbons, and steam and autothermal reforming of diesel fuel [12][13][14][15][16]. The applied approach appeared universal and technologically advanced.…”

Section: Chemical Problems 2019 No 2 (17)mentioning

confidence: 99%

“…The active component (Ni, Cl and CeO 2 ) loading in the structured catalyst (further denoted as Ni/Ce-Al/FCA) was ~11 wt% with respect to FCA (See Table 1). Previously, the as-prepared and used Rh supported over composite ceriazirconiaalumina FeCrAl alloy wire mesh catalysts (synthesized by the same preparation protocol as described above for the Rh/CZ-Al/FCA honeycomb catalytic module) [13,15,16] and Ni/Ce-Al/FCA sandwich-type catalytic modules [22,23] were characterized by several techniques. It was shown by transmission electron microscopy (TEM) study that the rhodium in the catalysts uniformly distributed over the ceria -zirconia surface.…”

Section: Experimental Part 21 Catalyst Preparation and Characterizationmentioning

confidence: 99%

Catalysts and Catalytic Processes for the Production of Hydrogen-Rich Gas for Fuel Cell Feeding

Бадмаев¹,

Belyaev²,

Konishcheva³

et al. 2019

Chemical Problems

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“…Furthermore, novel-metal-based (RhPt/ZrO 2, Al 2 O 3 , CeO 2 -ZrO 2 , SiO 2 , and TiO 2 , Rh-Ni/Al 2 O 3 ) catalysts were evaluated for reforming diesel fuel in the presence of sulfur compounds [32][33][34][35][36]. Rh-based catalysts were prepared via microemulsion and a zone-coating preparation method for diesel reforming [37,38] and also sorption-hydrolytic deposition conducted for highly dispersed Rh-, Pt-, and Ru/Ce 0.75 Zr 0.25 O 2 -δ catalysts [39]. Rh/Ce 0.75 Zr 0.25 O 2-δ -η-Al 2 O 3 /FeCrAl were tested in pilot scale reactors with autothermal reforming of n-hexadecane.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Ni-Al-Based Catalysts and Influence of Aromatic Hydrocarbon for Autothermal Reforming of Diesel Surrogate Fuel

et al. 2019

Catalysts

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Aromatic hydrocarbons along with sulfur compounds in diesel fuel pose a significant threat to catalytic performances, due mainly to carbon deposition on the catalytic surface. In order to investigate the influence of an aromatic hydrocarbon on the autothermal reforming of diesel fuel, 1-methylnaphthalene (C11H10) was selected as an aromatic hydrocarbon. Two types of diesel surrogate fuel, i.e., DH (dodecane (C12H26) and hexadecane (C16H34) mixture) as well as DHM (DH fuel and C11H10 mixture) fuel, were prepared. A Rh-Al-based catalyst (R5A-I) was prepared using a conventional impregnation method. Various Ni-Al-based catalysts with Fe and Rh promoters were prepared via a polymer modified incipient method to improve the carbon coking resistance. These catalysts were tested under conditions of S/C = 1.17, O2/C = 0.24, 750 °C, and GHSV = 12,000 h-1 at DH or DHM fuel. R5A-I exhibited excellent catalytic performance in both DH and DHM fuels. However, carbon coking and sulfur poisoning resistance were observed in our previous study for the Ni-Al-based catalyst with the Fe promoter, which became deactivated with increasing reaction time at the DHM fuel. In the case of the Rh promoter addition to the Ni-Al-based catalysts, the catalytic performances decreased relatively slowly with increasing (from 1 wt.% (R1N50A) to 2 wt.% (R2N50A)) content of Rh2O3 at DHM fuel. The catalysts were analyzed via scanning electron microscopy combined with energy dispersive X-ray, X-ray diffraction, and X-ray photoelectron spectroscopy. Gas chromatography-mass spectrometry detected various types of hydrocarbons, e.g., ethylene (C2H4), with catalyst deactivation. The results revealed that, among the produced hydrocarbons, C2H4 played a major role in accelerating carbon deposition that blocks the reforming reaction. Therefore, Rh metal deserves consideration as a carbon coking inhibitor that prevents the negative effects of the C2H4 for autothermal reforming of diesel fuel in the presence of aromatic hydrocarbons.

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Highly dispersed Rh-, Pt-, Ru/Ce0.75Zr0.25O2–δ catalysts prepared by sorption-hydrolytic deposition for diesel fuel reforming to syngas

Cited by 83 publications

References 36 publications

Internal Reforming Solid Oxide Fuel Cell System Operating under Direct Ethanol Feed Condition

Internal Reforming Solid Oxide Fuel Cell System Operating under Direct Ethanol Feed Condition

Catalysts and Catalytic Processes for the Production of Hydrogen-Rich Gas for Fuel Cell Feeding

Enhanced Ni-Al-Based Catalysts and Influence of Aromatic Hydrocarbon for Autothermal Reforming of Diesel Surrogate Fuel

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