Synthesis and characterization of a highly active alumina catalyst for methanol dehydration to dimethyl ether

Kim, Seung-Moon; Lee, Yun-Jo; Bae, Jong Wook; Potdar, H.S.; Jun, Ki‐Won

doi:10.1016/j.apcata.2008.06.032

Cited by 134 publications

(43 citation statements)

References 30 publications

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“…Here it is important to mention that according to XPS data there was no surface Ni left in metallic form, but the activity of the catalysts were appreciably high, which disagrees with the previous findings that the surface oxide layer causes deactivation of Ni/Al 2 O 3 system [14,37,38]. This raises the question regarding the mechanism of catalytic activity of Ni/Al 2 O 3 system for APR of EtOH.…”

contrasting

confidence: 66%

Effect of preparation method on the performance of the Ni/Al2O3 catalysts for aqueous-phase reforming of ethanol: Part II-characterization

Roy

Artyushkova

Pham

et al. 2012

International Journal of Hydrogen Energy

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contrasting

confidence: 66%

Effect of preparation method on the performance of the Ni/Al2O3 catalysts for aqueous-phase reforming of ethanol: Part II-characterization

Roy

Artyushkova

Pham

et al. 2012

International Journal of Hydrogen Energy

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“…NH 3 desorption from Al 2 O 3 -based materials is usually reported in the range between 100-500 8C for NH 3 adsorbed on Brønsted-acidic sites (OH groups). [68] As Figure 5 shows, La 2 O 3 or CeO 2 doping had a strong effect on the population of acidic sites and, consequently, on the adsorbed amount of NH 3 . Pt/Al 2 O 3 adsorbed the largest amount of NH 3 .…”

mentioning

confidence: 96%

Renewable H₂ from Glycerol Steam Reforming: Effect of La₂O₃ and CeO₂ Addition to Pt/Al₂O₃ catalysts.

et al. 2010

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Glycerol is the main byproduct of biodiesel production and its increased production volume derives from the increasing demand for biofuels. The conversion of glycerol to hydrogen-rich mixtures presents an attractive route towards sustainable biodiesel production. Here we explored the use of Pt/Al(2)O(3)-based catalysts for the catalytic steam reforming of glycerol, evidencing the influence of La(2)O(3) and CeO(2) doping on the catalyst activity and selectivity. The addition of the latter metal oxides to a Pt/Al(2)O(3) catalyst is found to significantly improve the glycerol steam reforming, with high H(2) and CO(2) selectivities. A good catalytic stability is achieved for the Pt/La(2)O(3)/Al(2)O(3) system working at 350 degrees C, while the Pt/CeO(2)/Al(2)O(3) catalyst sharply deactivates after 20 h under similar conditions. Studies carried out on fresh and exhausted catalysts reveal that both systems maintain high surface areas and high Pt dispersions. Therefore, the observed catalyst deactivation can be attributed to coke deposition on the active sites throughout the catalytic process and only marginally to Pt nanoparticle sintering. This work suggests that an appropriate support composition is mandatory for preparing high-performance Pt-based catalysts for the sustainable conversion of glycerol into syngas.

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“…phase. This oxy-hydroxide phase AlO(OH) commonly termed as pseudoboehmite is generally the precursor to γ-Al 2 O 3 phase and completely conversts to the alumina phase at higher temperatures [60,61]. X-ray diffraction pattern of the used AP-64 catalyst sample is very similar…”

Section: Influence Of the Residence Time On Conversion And Selectivitmentioning

confidence: 97%

Gas-phase dehydration of glycerol over commercial Pt/γ-Al2O3 catalysts

Данов

Esipovich

Belousov

et al. 2015

Chinese Journal of Chemical Engineering

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Synthesis and characterization of a highly active alumina catalyst for methanol dehydration to dimethyl ether

Cited by 134 publications

References 30 publications

Effect of preparation method on the performance of the Ni/Al2O3 catalysts for aqueous-phase reforming of ethanol: Part II-characterization

Effect of preparation method on the performance of the Ni/Al2O3 catalysts for aqueous-phase reforming of ethanol: Part II-characterization

Renewable H₂ from Glycerol Steam Reforming: Effect of La₂O₃ and CeO₂ Addition to Pt/Al₂O₃ catalysts.

Gas-phase dehydration of glycerol over commercial Pt/γ-Al2O3 catalysts

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Synthesis and characterization of a highly active alumina catalyst for methanol dehydration to dimethyl ether

Cited by 134 publications

References 30 publications

Effect of preparation method on the performance of the Ni/Al2O3 catalysts for aqueous-phase reforming of ethanol: Part II-characterization

Effect of preparation method on the performance of the Ni/Al2O3 catalysts for aqueous-phase reforming of ethanol: Part II-characterization

Renewable H2 from Glycerol Steam Reforming: Effect of La2O3 and CeO2 Addition to Pt/Al2O3 catalysts.

Gas-phase dehydration of glycerol over commercial Pt/γ-Al2O3 catalysts

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Renewable H₂ from Glycerol Steam Reforming: Effect of La₂O₃ and CeO₂ Addition to Pt/Al₂O₃ catalysts.