Mesoporous tin oxide: An efficient catalyst with versatile applications in acid and oxidation catalysis

Manjunathan, Pandian; Marakatti, Vijaykumar S.; Chandra, Prakash; Kulal, Atul B.; Umbarkar, Shubhangi B.; Ravishankar, Raman; Shanbhag, Ganapati V.

doi:10.1016/j.cattod.2017.10.009

Cited by 63 publications

(29 citation statements)

References 98 publications

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“…A homogeneous catalyst, such as H 2 SO 4 , offers high activity, however, these homogenous catalysts are corrosive, not recyclable, difficult to separate, and considerably more expensive. Similarly, chloride, such as tin chloride (SnCl 2 ), is also unwanted due to its corrosion tendency [30]. Reusability is also an important part of studies.…”

Section: Mopo Supported To Sba-15mentioning

confidence: 99%

Glycerol to Solketal for Fuel Additive: Recent Progress in Heterogeneous Catalysts

et al. 2019

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Biodiesel has been successfully commercialized in numerous countries. Glycerol, as a byproduct in biodiesel production plant, has been explored recently for fuel additive production. One of the most prospective fuel additives is solketal, which is produced from glycerol and acetone via an acetalization reaction. This manuscript reviewed recent progress on heterogeneous catalysts used in the exploratory stage of glycerol conversion to solketal. The effects of acidity strength, hydrophobicity, confinement effect, and others are discussed to find the most critical parameters to design better catalysts for solketal production. Among the heterogeneous catalysts, resins, hierarchical zeolites, mesoporous silica materials, and clays have been explored as effective catalysts for acetalization of glycerol. Challenges with each popular catalytic material are elaborated. Future works on glycerol to solketal will be improved by considering the stability of the catalysts in the presence of water as a byproduct. The presence of water and salt in the feed is certainly destructive to the activity and the stability of the catalysts.

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Section: Mopo Supported To Sba-15mentioning

confidence: 99%

Glycerol to Solketal for Fuel Additive: Recent Progress in Heterogeneous Catalysts

et al. 2019

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“…The TUD-1 mesoporous material, with its uniform pore system and interconnectivity pores, offers excellent accessibility for reactants and products to reach or leave the Au 0 active sites which makes the reaction proceed faster than for other mesoporous materials. Few studies were also reported to show the advantages of using TUD-1 as a support for different active sites, such as copper in phenol hydroxylation [ 56 ], vanadium in the epoxidation of trans-stilbene [ 57 ] and indium in Baeyer–Villiger oxidation [ 58 ]. Therefore, Au-TUD-1 was considered a promising catalyst for CO oxidation, and further developments were carried out to reach the conversion temperature below the room temperature and to compare it with other Au catalysts [ 59 , 60 ], which will be reported shortly.…”

Section: Resultsmentioning

confidence: 99%

Noble Metal Nanoparticles Incorporated Siliceous TUD-1 Mesoporous Nano-Catalyst for Low-Temperature Oxidation of Carbon Monoxide

et al. 2020

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This report, for the first time, demonstrated the low-temperature oxidation of carbon monoxide (CO) using nano-catalysts consisting of noble metal nanoparticles incorporated in TUD-1 mesoporous silica nano-structures synthesized via a one-pot surfactant-free sol–gel synthesis methodology. Herein, we investigated a nano-catalyst, represented as M-TUD-1 (M = Rh, Pd, Pt and Au), which was prepared using a constant Si/M ratio of 100. The outcome of the analytical studies confirmed the formation of a nano-catalyst ranging from 5 to 10 nm wherein noble metal nanoparticles were distributed uniformly onto the mesopores of TUD-1. The catalytic performance of M-TUD-1 catalysts was examined in the environmentally impacted CO oxidation reaction to CO2. The catalytic performance of Au-TUD-1 benchmarked other M-TUD-1 catalysts and a total conversion of CO was obtained at 303 K. The activity of the other nano-catalysts was obtained as Pt-TUD-1 > Pd-TUD-1 > Rh-TUD-1, with a total CO conversion at temperatures of 308, 328 and 348 K, respectively. The Au-TUD-1 exhibited a high stability and reusability as indicated by the observed high activity after ten continuous runs without any treatment. The outcomes of this research suggested that M-TUD-1 are promising nano-catalysts for the removal of the toxic CO gas and can also potentially be useful to protect the environment where a long-life time, cost-effectiveness and industrial scaling-up are the key approaches.

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“…) for surface acidity estimation were performed for STEPC 0.2 , STUWEPC 0.1 , STUWEPC 0.2 , STUWEPC 0.3 , and CPPC 0.2 . The presence of weak acidic sites was noticed in CPPC 0.2 , STEPC 0.2 , STUWEPC 0.1 , STUWEPC 0.2 , and STUWEPC 0.3 at 150 °C, 190 °C, 160 °C, 225 °C, and 227 °C, respectively . The shift in the TPD peak can be ascribed to the different hydrothermal impregnation protocols as well as amount of acidic sites present in the catalysts.…”

Section: Resultsmentioning

confidence: 99%

“…NH 3 -TPD analyses ( Fig. 1 [20]. The shift in the TPD peak can be ascribed to the different hydrothermal impregnation protocols as well as amount of acidic sites present in the catalysts.…”

Section: Characterizationmentioning

confidence: 99%

Energy‐Efficient 2‐Ethylhexyl Acetate Synthesis with a Nano‐Sn‐Hydroxyapatite Photocatalyst

Mukhopadhyay

Chakraborty

2020

Chem Eng & Technol

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A nano‐tin oxide grafted natural‐hydroxyapatite photocatalyst was fabricated using a greener approach involving sequential application of solar‐type and ultrasound‐wave energy (STUWE). The protocol provided 76 % higher surface area, 59 % more surface acidity, and 15 % reduced band gap energy than conventionally prepared photocatalysts (CPPCs). The efficacy of the STUWE‐promoted photocatalyst (STUWEPC) was optimized for maximization of 2‐ethylhexyl acetate yield (97 %) employing an energy‐efficient solar‐type/ultrasound synergistic batch reactor. A considerably lower activation energy, estimated by Langmuir‐Hinshelwood kinetics, and higher reusability characteristics (upto 8 recycles) of the STUWEPC than CPPC highlights the superiority of the STUWE procedure.

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Mesoporous tin oxide: An efficient catalyst with versatile applications in acid and oxidation catalysis

Cited by 63 publications

References 98 publications

Glycerol to Solketal for Fuel Additive: Recent Progress in Heterogeneous Catalysts

Glycerol to Solketal for Fuel Additive: Recent Progress in Heterogeneous Catalysts

Noble Metal Nanoparticles Incorporated Siliceous TUD-1 Mesoporous Nano-Catalyst for Low-Temperature Oxidation of Carbon Monoxide

Energy‐Efficient 2‐Ethylhexyl Acetate Synthesis with a Nano‐Sn‐Hydroxyapatite Photocatalyst

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