Cold Plasma and Acid Treatment Modification Effects on Phonolite

Herrador, José Miguel Hidalgo; Tišler, Zdenĕk; Hájková, Pavlína; Soukupová, Lenka; Zárybnická, Lenka; Černá, Karla

doi:10.17344/acsi.2017.3343

Cited by 8 publications

(12 citation statements)

References 8 publications

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“…Because the raw phonolite material had very poor textural properties, an acid treatment of this raw material was performed. An increase in the total porosity and number of weak acid sites on the surface of the solid was found [14,17] resulting in an increase in the pore volume and specific surface area. These changes in the support used to produce the new catalysts are described in previous publications [14,17].…”

Section: Catalysts Characterizationmentioning

confidence: 99%

“…An increase in the total porosity and number of weak acid sites on the surface of the solid was found [14,17] resulting in an increase in the pore volume and specific surface area. These changes in the support used to produce the new catalysts are described in previous publications [14,17]. The acid treatment led to the removing of mainly Al and Na with the consequent increase of the creation of new pores in the solid.…”

Section: Catalysts Characterizationmentioning

confidence: 99%

“…A previous experience by using a NiW-supported catalyst on oxalic acid modified Ph for the production of MIBK led to continue with the research of the MSO reduction [16]. Three catalysts based on NiW, NiMo, CoMo supported on acid modified Ph [17] were tested in the MSO reduction giving as main products the MIBK, 2MP, and 2-methyl-2-pentene (MPe).…”

Section: Introductionmentioning

confidence: 99%

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Mesityl Oxide Reduction by Using Acid-Modified Phonolite Supported NiW, NiMo, and CoMo Catalysts

et al. 2021

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Mesityl oxide is standardly used to produce methyl iso butyl ketone but it can be also used to produce other useful compounds. Three catalysts were used for the reaction of the mesityl oxide reduction. They were NiW, NiMo, and CoMo supported on phonolite modified by HCl (metals/Ph-HCl). The fresh catalysts were characterized by XRD, XRF, BET surface, Hg porosimetry, SEM, H2-TPR, NH3-TPD, CO2-TPD. The materials were directly used, previously reduced in H2 or sulfided for the mesityl oxide reduction under H2 atmosphere. The reaction was performed in an autoclave at T = 375 °C, p = 50 bar (H2), and TOS = 1.5 h. The products were analyzed by GC/MS, GC/FID-TCD, ATR. The main products were methyl isobutyl ketone, 2-methyl pentane, and 2-methyl-2-pentene. Sulfided metal catalysts were the most active in the methyl isobutyl ketone, where the NiWSx/Ph-HCl catalyst showed the highest activity. For the non-previously-activated and hydrogen activated catalysts the most active catalyst was the NiMo/Ph-HCl for the production of methyl isobutyl ketone. The catalyst CoMo/Ph-HCl activated in hydrogen was the most active for the production of 2-methyl pentane compared to the other two hydrogen-activated materials.

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Section: Catalysts Characterizationmentioning

confidence: 99%

Section: Catalysts Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mesityl Oxide Reduction by Using Acid-Modified Phonolite Supported NiW, NiMo, and CoMo Catalysts

et al. 2021

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“…The XRD diagrams ( Figure 2 ) were similar for all solids (i.e., the signals had the same angle). However, only peaks related (XRD patterns) to minerals from the feldspar group were clearly found (sanidine ((PDF 19-1227), analcime (PDF 72-0445), and nepheline (PDF 70-1582) diagrams) [ 15 ].…”

Section: Resultsmentioning

confidence: 99%

“…This ore was taken from Northwest Czech Republic. The raw Ph material was treated with hydrochloric acid (NiW/Ph-HCl) and oxalic acid (NiW/Ph-Ox) using the same procedure described in the literature [ 15 ]. The Ph was supplied in sand form with a size of 0–2 mm by the company Keramost a. s. (Most, Czech Republic).…”

Section: Methodsmentioning

confidence: 99%

Oxalic Acid as a Hydrogen Donor for the Hydrodesulfurization of Gas Oil and Deoxygenation of Rapeseed Oil Using Phonolite-Based Catalysts

et al. 2020

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The use of renewable local raw materials to produce fuels is an important step toward optimal environmentally friendly energy consumption. In addition, the use of these sources together with fossil fuels paves the way to an easier transition from fossil to renewable fuels. The use of simple organic acids as hydrogen donors is another alternative way to produce fuel. The present work reports the use of oxalic acid as a hydrogen donor for the catalytic hydrodesulfurization of atmospheric gas oil and the deoxygenation of rapeseed oil at 350 °C. For this process, one commercial NiW/SiO2–Al2O3 solid and two NiW/modified phonolite catalysts were used, namely Ni (5%) W (10%)/phonolite treated with HCl, and Ni (5%) W (10%)/phonolite treated with oxalic acid. The fresh phonolite catalysts were characterized by Hg porosimetry and N2 physisorption, ammonia temperature programmed desorption (NH3-TPD), X-ray diffraction (XRD), and X-ray fluorescence (XRF). The sulfided metal phonolite catalysts were characterized by XRD and XRF. Hydrodesulfurization led to a decrease in sulfur content from 1 to 0.5 wt% for the phonolite catalysts and to 0.8 wt% when the commercial catalyst was used. Deoxygenation led to the production of 15 and 65 wt% paraffin for phonolite and commercial solids, respectively. The results demonstrate the potential of using oxalic acid as a hydrogen donor in hydrotreating reactions.

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Acid-modified phonolite and foamed zeolite as supports for NiW catalysts for deoxygenation of waste rendering fat

Hidalgo

Tišler

Vráblík

et al. 2018

Reac Kinet Mech Cat

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Acid-modified phonolite material, Al 2 O 3 /foam zeolite and foam zeolite were used as supports for NiW catalysts. The zeolite type materials were prepared by a novel procedure from natural clinoptilolite. Phonolite materials were loaded with 5, 7.5 and 10 wt% of Ni containing 10, 7.5 and 5 wt% of W. Al 2 O 3 /foam zeolite contained 4 and 13 wt% of Ni and W and pure foamed zeolite was effectively loaded with 5 and 16 wt% of Ni and W. NiW/Al 2 O 3 catalyst (3 wt% Ni and 11 wt% of W) was used for comparison of catalytic properties of synthesized materials. Catalytic tests were carried out in an autoclave pressurized at 7 MPa (H 2 ) at room temperature and then heated to 365 °C for 1 h. Catalysts were characterized by N 2 physisorption, XRD, XRF, NH 3 -TPD, CO 2 -TPD and H 2 -TPR. Catalyst properties were compared for the HDO of rendering fat into hydrocarbons. The liquid products were analyzed by simulated distillation, C, H, N, S elemental analysis, ATR and density (15 °C). Gaseous products were characterized by RGA-GC. Used catalysts were also analyzed by N 2 -TGA and O 2 -TGA. Novel phonolite modified solids and NiW/foam zeolite type materials were tested for the first time as catalysts being in some cases more active than NiW/Al 2 O 3 material. Ni(5%)W(10%)/Acid phonolite and NiW/Foamed Zeolite resulted to be the most active materials for the HDO and hydrocracking reactions. The lowest amount of carbonaceous species on the surface of tested catalyst was found for the Ni(5%)W(10%)/Acid phonolite solid.

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Cold Plasma and Acid Treatment Modification Effects on Phonolite

Cited by 8 publications

References 8 publications

Mesityl Oxide Reduction by Using Acid-Modified Phonolite Supported NiW, NiMo, and CoMo Catalysts

Mesityl Oxide Reduction by Using Acid-Modified Phonolite Supported NiW, NiMo, and CoMo Catalysts

Oxalic Acid as a Hydrogen Donor for the Hydrodesulfurization of Gas Oil and Deoxygenation of Rapeseed Oil Using Phonolite-Based Catalysts

Acid-modified phonolite and foamed zeolite as supports for NiW catalysts for deoxygenation of waste rendering fat

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