Preparation, characterization and thermal stability improvement of mesoporous sulfated zirconia for converting deodorizer distillate to methyl esters

Nguyen, Hong Khanh Dieu; Pham, Phong V.; Vo, Anh Duc

doi:10.1007/s10934-016-0274-0

Cited by 18 publications

(8 citation statements)

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“…Observations from the pattern clearly showed the peaks at 2θ ~ 2.2° and 2θ ~ 4.2° corresponding to (100) and (110) diffraction planes, respectively, specified for the ordered mesoporous structure [18][19][20]. These peaks were also familiar with the ones observed from the SAXRD patterns of other typical mesoporous materials such as MCM-41 [21,22]. On the other hand, strong intensity of the (100) peak and clear distinguish of the (110) peak were a good evident corresponding to the high degree of order of the mesoporous channels in the support.…”

Section: Structure Of Mso Supportmentioning

confidence: 69%

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Study on preparation of ordered mesoporous silica supported NiGaCo catalyst for conversion of carbon dioxide to methanol

et al. 2020

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The paper reported preparation, characterization and application of novel ordered mesoporous silica supported NiGaCo catalyst in direct conversion of carbon dioxide to methanol. The catalyst was prepared by doping Ni 2+ , Ga 3+ and Co 2+ onto ordered mesoporous amorphous silica support (MSO) through wet impregnation-condensation method followed by calcination and reduction to transfer the metallic cation states to the alloy ones. The catalyst was assigned as NiGaCo/MSO, being prepared under conditions such as room temperature, time of 24 h, calcination at 600 °C for 6 h, and reduction in NaBH 4 /ethanol solution, and could be used for converting CO 2 to methanol at low pressure. Investigations illustrated high activity of the catalyst at high pressure of 35 bars but at low pressure of 5 bar, the catalyst still showed considerable activity and selectivity. Many techniques were applied for the catalysis characterization including Small Angle X-Ray Diffraction (SAXRD), Wide Angle X-Ray Diffraction (WAXRD), Fourier Transform-Infrared Spectroscopy (FT-IR), Thermal Gravimetric-Differential Scanning Calorimetry-Mass Spectroscopy (TG-DSC-MS) and X-Ray Photoelectron Spectroscopy (XPS). Gas Chromatography (GC) coupled Thermal Conductivity Detector (TCD) and Flame Ionized Detector (FID) were used for determining the gas composition.

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Section: Structure Of Mso Supportmentioning

confidence: 69%

“…The amorphous structure provided an important characteristic for the formation of the ordered mesoporous structure as it was isotropic [21,22].…”

Section: Structure Of Mso Supportmentioning

confidence: 99%

Study on preparation of ordered mesoporous silica supported NiGaCo catalyst for conversion of carbon dioxide to methanol

et al. 2020

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“…6(a). Desorption peaks were observed in the ranges 180–332, 622–739 and 803–884 °C, which were, respectively, attributed to weak acid, strong acid and superacid sites 64 . Two peaks in the NH 3 ‐TPD curve of UiO‐66 corresponded to weak acid and strong acid sites with corresponding desorbed ammonia volumes of 19 and 44 cm 3 g −1 , respectively (Table 1).…”

Section: Resultsmentioning

confidence: 98%

“…Desorption peaks were observed in the ranges 180-332, 622-739 and 803-884°C, which were, respectively, attributed to weak acid, strong acid and superacid sites. 64 Two peaks in the NH 3 -TPD curve of UiO-66 corresponded to weak acid and strong acid sites with corresponding desorbed ammonia volumes of 19 and 44 cm 3 g −1 , respectively ( Table 1). Based on the results of TGA and literature reports, 40 the inorganic [Zr 6 O 4 (OH) 4 ] 12+ clusters in UiO-66 would undergo dehydroxylation to form inner clusters of Z 6 O 6 as the temperature increased.…”

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confidence: 98%

An alumina‐coated UiO‐66 nanocrystalline solid superacid with high acid density as a catalyst for ethyl levulinate synthesis

Zhang

2020

J of Chemical Tech & Biotech

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BACKGROUND: The zirconium-containing metal-organic framework (MOF) UiO-66 was used as a cell to synthesize SO 4 2 − /ZrO 2 @Al 2 O 3 , a high-density superacid with relatively strong Brønsted acidity. The UiO-66 MOF was first coated with alumina to form ZrO 2 @Al 2 O 3. Impregnation with ammonium sulfate and calcination at 500°C afforded the bimetallic composite solid superacid SO 4 2− /ZrO 2 @Al 2 O 3. RESULTS: Scanning and transmission electron microscopy images confirmed that UiO-66 was successfully coated with aluminium oxide, and its octahedral structure and uniform size (400-600 nm) were retained. SO 4 2− /ZrO 2 @Al 2 O 3 had a Brunauer-Emmett-Teller specific surface area of 301-330 m 2 g −1 and average pore diameter of 9.6-10.7 nm. X-ray photoelectron spectroscopy and Fourier transform infrared analysis showed that SO 4 2− /ZrO 2 @Al 2 O 3 contained S 6+ and Al 3+. Temperatureprogrammed ammonia desorption analysis showed that SO 4 2− /ZrO 2 @Al 2 O 3 contained super-strong acid sites. The total volume of desorbed ammonia reached 90-109 cm 3 g −1. Infrared spectra of adsorbed pyridine indicated that SO 4 2− /ZrO 2 @Al 2 O 3 contained mainly Lewis acid sites and was relatively rich in Brønsted acid sites. Thermogravimetric analysis showed that the thermal stability of SO 4 2− /ZrO 2 @Al 2 O 3 was high. CONCLUSIONS: SO 4 2− /ZrO 2 @Al 2 O 3-3M (the impregnation concentration of ammonium sulfate was 3 mol L −1) and glucose were used to synthesize ethyl levulinate (EL) in ethanol. The highest EL yield of 37.5 mol% was obtained after reacting the mixture at 200°C for 5 h. An EL yield of 28.8 mol% was obtained after four consecutive reuses of the SO 4 2− /ZrO 2 @Al 2 O 3-3M catalyst.

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“…several benefits such as produce fewer amounts of chemical waste and wastewater, not necessary advances process separation, has a hydrophobic surface, and less corrosion. Many studies have been reported the using of heterogeneous catalyst for biodiesel production, such as sulphated zirconia (SO 4 2-/ZrO 2 ) [14][15][16] , zeolite 17,18,19,20 , Lanthanum (La 3+ ) and HZSM-5 21 , Natural clay [22][23][24] , Amberlyst 15 25 , alumina (Al 2 O 3 ) 26 , silica 27 , hydroxyapatite 28 , Tungsten supported titania-silica composite 29 , Tin oxide 30 , niobic 31 , SBA-15 32,33 , Titania 34 and biomass waste biomass wastes 10,12,[35][36][37] .…”

Section: Introductionmentioning

confidence: 99%

Free Fatty Acids Esterification on Palm Oil Sludge using Zirconia-supported Indonesia Natural Zeolite as Heterogeneous Catalyst

Hidayat

Sutrisno

2018

Orient. J. Chem

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Biodiesel production has been attracted more intense study because of the growing interest in finding the alternative renewable energy resources. Commonly biodiesel production is produced using refined vegetable oils as feedstocks which catalyzed by a homogeneous catalyst. However, the homogeneous catalyst has many disadvantages such as complex products separation and environmentally problem. In this research, the esterification of Palm Oil Sludge (POS) using zirconia supported Indonesia natural zeolite as a heterogeneous catalyst was studied. The POS is low feedstock price and available abundantly. The catalysts were analyzed in term of porosity analysis (Gas Sorption Analysis method), XRD (X-Ray Diffraction), and FTIR (Fourier-transform infrared spectroscopy). The FFAs conversion as high as was 84.2% achieved at following reaction conditions: 2 h reaction time, 65°C reaction temperature, 1:10 POS to methanol mole ratio, and catalyst amount 10 wt. % of POS. The FFA conversion was decreased after three consecutive of esterification reaction.

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Preparation, characterization and thermal stability improvement of mesoporous sulfated zirconia for converting deodorizer distillate to methyl esters

Cited by 18 publications

References 18 publications

Study on preparation of ordered mesoporous silica supported NiGaCo catalyst for conversion of carbon dioxide to methanol

Study on preparation of ordered mesoporous silica supported NiGaCo catalyst for conversion of carbon dioxide to methanol

An alumina‐coated UiO‐66 nanocrystalline solid superacid with high acid density as a catalyst for ethyl levulinate synthesis

Free Fatty Acids Esterification on Palm Oil Sludge using Zirconia-supported Indonesia Natural Zeolite as Heterogeneous Catalyst

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