(V)/Hydrotalcite, (V)/Al2O3, (V)/TiO2 and (V)/SBA-15 catalysts for the partial oxidation of ethanol to acetaldehyde

Hidalgo, José Manuel Soto; Tišler, Zdeněk; Kubička, David; Raabová, Kateřina; Bulánek, Roman

doi:10.1016/j.molcata.2016.04.024

Cited by 36 publications

(15 citation statements)

References 41 publications

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“…2) presented high selectivity to acetaldehyde being the acetaldehyde diethyl acetal the main secondary product. Surely, the production of acetaldehyde diethyl acetal was due to the presence of acid sites which facilitated the reaction of acetaldehyde with ethanol forming this product [17,24]. In all cases, the selectivity to acetaldehyde was higher than 65 %.…”

Section: Resultsmentioning

confidence: 96%

“…The two blank tests were carried out using the same conditions than for the normal tests. The procedure for introducing the catalyst and SiC was described by J. M. Hidalgo et al [17]. A continuous flow reactor (stainless steel 316) with length of 1000 mm was used.…”

Section: Methodsmentioning

confidence: 99%

“…Also, Mattos et al [15] and Sun et al [16] published works in which informed about the dependence of the ethanol catalytic transformations on acidity of the catalyst and reducibility of the metal. One work about the ethanol partial oxidation using different metal oxides including vanadium supported SBA-15 was published [17]. Several SiO 2 based catalysts with some vanadium content were characterized in a previous published work [18] with the aim of studying the variety of vanadium present on their surface and its acting in the partial oxidation of ethanol using a glass micro-scale reactor.…”

Section: Introductionmentioning

confidence: 99%

“…Several SiO 2 based catalysts with some vanadium content were characterized in a previous published work [18] with the aim of studying the variety of vanadium present on their surface and its acting in the partial oxidation of ethanol using a glass micro-scale reactor. In our case, due to the low activity of this type of materials compared to others such as VO x /TiO 2 [17] these mesoporous catalysts were selected and tested with the aim of studying the possible problematics concerning to the use of a metal bench-scale stainless steel reactor for the partial oxidation of ethanol using high temperatures (250-300 °C). Thus, this information can be useful for the industry interested in the use of heterogeneous catalysis for the production of acetaldehyde from the ethanol.…”

Section: Introductionmentioning

confidence: 99%

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Partial Oxidation of Ethanol Using VOx/SBA-15 and VOx/Fumed Silica Catalysts in a Bench-scale Stainless Steel Reactor

Herrador

Tišler

2017

Period. Polytech. Chem. Eng.

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Two VOx/SBA-15 catalysts and three VOx/SiO2-fumed silica, with 5, 10 and 1, 5, 10 %wt. vanadium content respectively, were tested in a stainless steel continuous flow reactor for the partial oxidation of ethanol. The catalysts were tested at 150 – 300 °C. Products were analyzed by GC-FID, GC-OFID and GC-MS. The aim was exploring the problematics which could be found when more industrial close conditions are used. The total conversion of ethanol and selectivity to acetaldehyde were different than the expected ones. For VOx/SiO2-fumed silica, the total conversion was higher with a lower selectivity to acetaldehyde compared to VOx/SBA-15 catalysts.

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Section: Resultsmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Partial Oxidation of Ethanol Using VOx/SBA-15 and VOx/Fumed Silica Catalysts in a Bench-scale Stainless Steel Reactor

Herrador

Tišler

2017

Period. Polytech. Chem. Eng.

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“…Plasma treatment conditions and parameters were: AC source voltage 20 kV, frequency 3 kHz, nominal power 120 W, modification time periods 5 s. XRF, XRD, specific surface area BET and NH 3 temperature programmed desorption (TPD-NH 3 ) were carried out using the same methodology described in the literature. 17 Mercury porosimetry measurements were performed on a Micromeritics AutoPore IV 9510 mercury porosimeter. All samples were dried before the analysis in a glass-cell at 110 °C under vacuum for 16 hours.…”

Section: Methodsmentioning

confidence: 99%

Cold Plasma and Acid Treatment Modification Effects on Phonolite

Herrador

Tišler²,

Hájková³

et al. 2017

ACSi

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A sample of phonolite was treated by cold plasma and hydrochloric acid diluted in water to study the change of its structure and acid properties. The phonolite and treated samples were analysed by XRD, elemental analysis XRF, specific surface area BET, TPD-NH 3 and FT-IR spectroscopy. They were also tested in the adsorption of Ca, K, Mg, P and Na impurities present in waste cooking oil. Plasma treated sample presented almost the same structure with some surface differences respect to the original phonolite. However, acid treated sample presented bigger total surface compared to the other samples, different structure, composition and acid properties.

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Activity, Selectivity and Initial Degradation of Iron Molybdate in the Oxidative Dehydrogenation of Ethanol

et al. 2022

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Iron molybdate catalysts are applied in the industrial FormOx process to produce formaldehyde by oxidative dehydrogenation (ODH) of methanol. Only few studies are available about the applicability of iron molybdate catalysts for the ODH of ethanol to produce acetaldehyde. Herein, an iron molybdate synthesized by co-precipitation (p) and an iron molybdate prepared by a ball-milling solid-state synthesis (bm) are applied as ethanol ODH catalysts. Both materials show attractive acetaldehyde selectivites of > 90 % (280 °C: p-Fe 2 (MoO 4 ) 3 : Y AcH = 90.3 %; bm-Fe 2 (MoO 4 ) 3 : Y AcH = 60.4 %) and a stable performance.The bulk composition and crystal structure could be confirmed by various characterization techniques and is maintained during ethanol ODH. XPS reveals an enrichment of Mo on the catalyst surface which is slightly decreasing after the catalytic tests. This observation could be a first sign of long-term deactivation like known from methanol ODH. Comparing the performance of both materials, p-Fe 2 (MoO 4 ) 3 shows higher activity and aldehyde selectivity. We propose the higher Mo/Fe surface ratio and the lower acidity to be the reasons for these differences.

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(V)/Hydrotalcite, (V)/Al2O3, (V)/TiO2 and (V)/SBA-15 catalysts for the partial oxidation of ethanol to acetaldehyde

Cited by 36 publications

References 41 publications

Partial Oxidation of Ethanol Using VOx/SBA-15 and VOx/Fumed Silica Catalysts in a Bench-scale Stainless Steel Reactor

Partial Oxidation of Ethanol Using VOx/SBA-15 and VOx/Fumed Silica Catalysts in a Bench-scale Stainless Steel Reactor

Cold Plasma and Acid Treatment Modification Effects on Phonolite

Activity, Selectivity and Initial Degradation of Iron Molybdate in the Oxidative Dehydrogenation of Ethanol

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