Deactivation of platinum catalysts by oxygen 2. Nature of the catalyst deactivation

DIJKGRAAF, P

doi:10.1016/0021-9517(88)90147-9

Cited by 71 publications

(19 citation statements)

References 33 publications

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“…(ii) The second group comprises those models which assume that the promoter does not influence directly the dehydrogenation step but affects the adsorption and transfer of oxygen, including the oxidation of the coproduct hydrogen, the oxidative removal of surface impurities [21,40,62,63], and the improved resistance of the Pt-group metal against "overoxidation" [64] (i.e., the coverage of surface sites by oxygen leading to a slow down of alcohol oxidation [48,65]). …”

Section: Discussionmentioning

confidence: 99%

A simple discrimination of the promoter effect in alcohol oxidation and dehydrogenation over platinum and palladium

Keresszegi

Mallát

Grunwaldt

et al. 2004

Journal of Catalysis

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Section: Discussionmentioning

confidence: 99%

A simple discrimination of the promoter effect in alcohol oxidation and dehydrogenation over platinum and palladium

Keresszegi

Mallát

Grunwaldt

et al. 2004

Journal of Catalysis

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“…We assumed there is no loss of oxidation catalyst activity for the base case design. The Pt/C catalyst used for glucose oxidation, however, can be deactivated by the dissolution of oxygen atoms into the platinum lattice . Catalyst activity data published by Dijkgraaf et al .…”

Section: Resultsmentioning

confidence: 99%

“…Catalyst activity data published by Dijkgraaf et al . show that the presence of oxygen deactivates Pt/C catalysts rapidly . The loss of catalyst activity is taken to be about 20% after 3 h .…”

Section: Resultsmentioning

confidence: 99%

Techno‐economic analysis of multiple bio‐based routes to adipic acid

Gunukula

Anex

2017

Biofuels Bioprod Bioref

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Techno‐economic studies of four processes for production of adipic acid from glucose were used to compare the minimum cost of production by each route. We analyzed the purely biological production via reverse β‐oxidation in E. coli; a purely chemical process using oxidation of glucose via chemical catalysis to glucaric acid that undergoes catalytic hydrodeoxygenation to adipic acid; and two hybrid routes that biologically convert glucose to either 6‐hydroxyhexanoic acid or 1, 6‐hexanediol, that are subsequently converted chemically to adipic acid using a metal catalyst. All analyses were based on adipic acid production capacity of 80 000 metric ton/year. Estimated total capital investments were US$157 million, $81 million, $166 million, and $177 million for the purely biological, chemical, and two integrated hybrid routes, respectively. Catalyst costs were estimated as $72 million, $36 million, and $37 million for the purely chemical and two integrated routes, respectively. The estimated adipic acid minimum selling prices were $1.36, $1.56, $1.48, and $1.70 per kg for the purely biological, purely chemical, and two integrated routes, respectively. Co‐product revenue and the use of unpurified sugars improved the economics of adipic acid production in the purely biological and two integrated routes. Comparison of the economics of the chemical catalytic steps shows that catalyst yields, turnover frequency, and catalyst life must be greater than 40% of theoretical, 0.01 s‐1, and 100 days to achieve economic viability of purely chemical and integrated routes to adipic acid. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…plasma treated show a better conversion than that obtained on the no-treated sample and on the calcined one. The oxygen brought in the plasma treatment does not have a particular influence on this catalytic system Ag/Al 2 O 3 for 500 W. However, with higher power (800 W) (Figure 2(d)) we notice a catalyst deactivation because oxygen recombines with higher power creating unfavourable reactions [22]. All the plasma treated samples lead to higher NO x conversion than the untreated sample.…”

Section: Effect Of Plasma Treatment Timementioning

confidence: 87%

Microwave Plasma Treatment for Catalyst Preparation: Application to Alumina Supported Silver Catalysts for SCR NO<sub>x</sub> by Ethanol

Guyon¹,

Tatoulian²,

Costa³

2013

MRC

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Thermal treatment either in the presence of oxygen (calcination) or of a reducing agent (reduction) result is all the time a key issue within the preparation of a catalyst. In this work, a microwave plasma treatment was chosen as an alternative to typical calcinations, because it is a more energy efficient process. Thus, a Microwave Fluidized Bed Plasma reactor (MFBP) was employed in catalyst synthesis process under different gas compositions, such as argon and argon/oxygen mixtures over -alumina supported silver catalysts, which are generally used for selective reduction of NO x by ethanol. After the first catalytic tests performed in the presence of plasma treated catalyst, it can be concluded that plasma treatment process represents an interesting alternative to conventional calcination during catalyst synthesis, resulting in a more sustainable process, moreover in view of its industrial application. In order to understand the particular effect of plasma treatment, the catalysts submitted to this treatment were carefully characterized by means of thermo gravimetric analysis (TGA), differential thermal analysis (DTA) and UV-VIS-NIR.

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Deactivation of platinum catalysts by oxygen 2. Nature of the catalyst deactivation

Cited by 71 publications

References 33 publications

A simple discrimination of the promoter effect in alcohol oxidation and dehydrogenation over platinum and palladium

A simple discrimination of the promoter effect in alcohol oxidation and dehydrogenation over platinum and palladium

Techno‐economic analysis of multiple bio‐based routes to adipic acid

Microwave Plasma Treatment for Catalyst Preparation: Application to Alumina Supported Silver Catalysts for SCR NO<sub>x</sub> by Ethanol

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Deactivation of platinum catalysts by oxygen 2. Nature of the catalyst deactivation

Cited by 71 publications

References 33 publications

A simple discrimination of the promoter effect in alcohol oxidation and dehydrogenation over platinum and palladium

A simple discrimination of the promoter effect in alcohol oxidation and dehydrogenation over platinum and palladium

Techno‐economic analysis of multiple bio‐based routes to adipic acid

Microwave Plasma Treatment for Catalyst Preparation: Application to Alumina Supported Silver Catalysts for SCR NO&lt;sub&gt;x&lt;/sub&gt; by Ethanol

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Microwave Plasma Treatment for Catalyst Preparation: Application to Alumina Supported Silver Catalysts for SCR NO<sub>x</sub> by Ethanol