Oxidative carbonylation of methanol over copper ion-containing ionic liquids immobilized on SBA-15

Wang, Hui; Wang, Bo; Liu, Chunling; Dong, Wen‐Sheng

doi:10.1016/j.micromeso.2010.05.006

Cited by 25 publications

(10 citation statements)

References 35 publications

(48 reference statements)

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“…CuBr 2 -PyIL immobilized by SBA-15 (PyIL = 3-trimethoxysilylpropylpyridinium chloride) was found to be more active and selective than CuBr 2 and CuBr 2 /SBA-15 catalysts in DMC synthesis (Table 4). 48 Although the CuBr 2 -PyIL/SBA-15 catalyst deactivated rapidly during the initial three runs, it still maintained a comparable activity to the fresh CuBr 2 /SBA-15 catalyst. Y-zeolite was also employed as an efficient support for heterogenization of CuCl 2 .…”

Section: Direct Oxidative Carbonylationmentioning

confidence: 94%

“…46 In addition, copper-containing catalytic ionic liquids (CILs) were also found active for the oxidative carbonylation of methanol to DMC. 47,48 Sundermeyer and co-workers synthesized and characterized three types of CILs, and the results are listed in Table 4. 47 However, the products and unreacted methanol need to be separated from the CILs media by distillation, which is an energy intensive process.…”

Section: Direct Oxidative Carbonylationmentioning

confidence: 99%

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Recent advances in dialkyl carbonates synthesis and applications

et al. 2015

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Dialkyl carbonates are important organic compounds and chemical intermediates with the label of "green chemicals" due to their moderate toxicity, biodegradability for human health and environment. Indeed, owing to their unique physicochemical properties and versatility as reagents, a variety of phosgene-free processes derived from CO or CO2 have been explored for the synthesis of dialkyl carbonates. In this critical review, we highlight the recent achievements (since 1997) in the synthesis of dialkyl carbonates based on CO and CO2 utilization, particularly focusing on the catalyst design and fabrication, structure-function relationship, catalytic mechanisms and process intensification. We also provide an overview regarding the applications of dialkyl carbonates as fuel additives, solvents and reaction intermediates (i.e. alkylating and carbonylating agents). Additionally, this review puts forward the substantial challenges and opportunities for future research associated with dialkyl carbonates.

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Section: Direct Oxidative Carbonylationmentioning

confidence: 94%

Section: Direct Oxidative Carbonylationmentioning

confidence: 99%

Recent advances in dialkyl carbonates synthesis and applications

et al. 2015

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“…Fourier transform infrared (FTIR) spectra was obtained over a range of 4000-400 cm 21 with a Nicolet Avatar 370 Tu et al 13 Carrero et al 14 Karvana and Atak€ ul 15 Habimana et al 16 Chen et al 8 Calles et al 17 Wang et al 18 Patel et al 19 Bardajee et al 20 Prathap et al 21 Sorolla et al 22 Zhang et al 23 This work CSI spectrometer (Thermo Electrom Corporation). The sample to be characterized was grounded using KBr pellet technique.…”

Section: Synthesis Of Catalyst and Its Characterizationmentioning

confidence: 99%

Catalytic Activity of Cu/SBA‐15 for Peroxidation of Pyridine Bearing Wastewater at Atmospheric Condition

2013

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In this study, Cu-loaded Santa Barbara amorphous (SBA)-15 catalysts were synthesized by impregnation method and further used for catalytic wet peroxidation (CWPO) of pyridine from aqueous solution using hydrogen peroxide as oxidant. The synthesized catalysts have been characterized by Brunauer-Emmett-Teller surface area: temperature-programmed reduction, H 2 -chemisorption, Fourier transform infrared spectroscopy, and field emission scanning electron microscopy. Characterization results indicate good dispersion of Cu species inside the porous structure of SBA-15. The effect of various parameters such as Cu loading on SBA-15, pH, catalyst dose, H 2 O 2 concentration, and temperature have been studied for their effect on CWPO of pyridine. More than 97% pyridine removal and 92% total organic carbon removal was achieved at optimum condition. Cu/SBA-15 showed stable performance during reuse for six cycles with negligible copper leaching.

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“…1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Thermal resistance of the coated siloxane polymers on SSZ-13 crystals was investigated by TG analysis. TG curve of fresh SSZ-13 crystals (after template removal and the storage at room temperature for one month) showed the obvious weight loss when temperature increased from room temperature to 523 K, which was assigned the removal of adsorbed water molecules on the surface of the zeolite micropores 30,31 . Besides this obvious weight loss, the polymer-coated SSZ-13 had the second obvious weight loss from 523 K to 1123 K (curve b in Figure 4), which could be attributed to the decomposition of the polymers and adsorbed organics.…”

Section: 1characterization Of Modified Ssz-13 Crystals and Membranesmentioning

confidence: 99%

Defect-Patching of Zeolite Membranes by Surface Modification Using Siloxane Polymers for CO₂ Separation

Zhou

Wang

et al. 2015

Ind. Eng. Chem. Res.

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Grain boundary defects are normally formed in zeolite membranes during membrane preparation and calcination processes. In this work, a siloxane polymer coating with the imidazole group was grafted on the surface of defective SSZ-13 membranes by chemical liquid deposition to seal the defects. The parameters such as silanization time, polymerization time, monomer type and concentration were optimized.Characterizations including Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM) and energy dispersive x-ray spectroscopy (EDX), showed that siloxane polymers were coated on the surfaces of SSZ-13 crystals and membrane. Six modified membranes showed decreased CO 2 permeance by only 21±5% [average CO 2 permeance of 1.9×10 -7 mol/(m 2 s Pa)] and increased CO 2 /CH 4 selectivity by a factor of 9±3 (average CO 2 /CH 4 selectivity of 108) for an equimolar CO 2 /CH 4 mixture at 298 K. CO 2 /CH 4 and CO 2 /N 2 selectivities of the modified membrane decreased with pressure and temperature. Membrane stability was investigated for a long-time test and exposures to water vapor at temperatures up to 378 K and to some organic solutions. This modification method is also effective in sealing the defects of other zeolite membranes such as AlPO-18 membranes.

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Oxidative carbonylation of methanol over copper ion-containing ionic liquids immobilized on SBA-15

Cited by 25 publications

References 35 publications

Recent advances in dialkyl carbonates synthesis and applications

Recent advances in dialkyl carbonates synthesis and applications

Catalytic Activity of Cu/SBA‐15 for Peroxidation of Pyridine Bearing Wastewater at Atmospheric Condition

Defect-Patching of Zeolite Membranes by Surface Modification Using Siloxane Polymers for CO₂ Separation

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Oxidative carbonylation of methanol over copper ion-containing ionic liquids immobilized on SBA-15

Cited by 25 publications

References 35 publications

Recent advances in dialkyl carbonates synthesis and applications

Recent advances in dialkyl carbonates synthesis and applications

Catalytic Activity of Cu/SBA‐15 for Peroxidation of Pyridine Bearing Wastewater at Atmospheric Condition

Defect-Patching of Zeolite Membranes by Surface Modification Using Siloxane Polymers for CO2 Separation

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Product

Resources

About

Defect-Patching of Zeolite Membranes by Surface Modification Using Siloxane Polymers for CO₂ Separation