Adsorptive desulfurization of fuels with Cu(I)/SBA-15 via low-temperature reduction

Kong, Liming; Zhang, Ting; Yao, Riyuan; Zeng, Yongping; Zhang, Lili; Jian, Panming

doi:10.1016/j.micromeso.2017.05.052

Cited by 32 publications

(20 citation statements)

References 34 publications

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“…The distinct peaks at 932 and 952 eV are ascribed to Cu 2p 3/2 + and Cu 2p 1/2 + , respectively. The peaks at 934 and 954 eV confirm the presence of Cu(II) species, probably arising from oxidation of Cu + during catalyst preparation . The XPS atomic percentages (N, 2.3%; Cu, 1.1%) show that the atomic ratio of nitrogen to copper is about 2 in ECS‐SB‐CuBr, proving that one copper atom coordinates with two nitrogen atoms in the ECS‐SB‐CuBr catalyst.…”

Section: Resultsmentioning

confidence: 99%

Functionalized expanded corn starch‐anchored Cu(I): An efficient and recyclable catalyst for oxidation of 5‐hydroxymethylfurfural to 2,5‐diformylfuran

Min

et al. 2019

Applied Organom Chemis

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The development of new strategies for the synthesis of biomass‐based non‐precious metal heterogeneous catalysts has recently received great interest from chemists because of the advantages of these catalytic systems being sustainable, low cost and green. An expanded corn starch‐supported CuBr catalyst (ECS‐SB‐CuBr) has been successfully prepared and well characterized using Fourier transform infrared spectroscopy, thermogravimetric analysis, powder X‐ray diffraction, X‐ray photoelectron spectroscopy and scanning electron microscopy/energy‐dispersive X‐ray spectroscopy. Further, ECS‐SB‐CuBr was used as a heterogeneous catalyst for the selective oxidation of 5‐hydroxymethylfurfural (HMF) into 2,5‐diformylfuran (DFF) and a full HMF conversion is obtained with 98% DFF yield in acetonitrile under ambient pressure of dioxygen at 50°C. The catalyst also showed good reusability, could be easily recovered through filtration and washing and was reused in at least six consecutive runs with virtually no loss of catalytic performance.

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Section: Resultsmentioning

confidence: 99%

Functionalized expanded corn starch‐anchored Cu(I): An efficient and recyclable catalyst for oxidation of 5‐hydroxymethylfurfural to 2,5‐diformylfuran

Min

et al. 2019

Applied Organom Chemis

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“…Contributing to this distinction in the bond strength, CO can be readily separated from gas mixtures. , It is known that the efficiency of the π-complexation adsorption is mainly dependent on the structural property of adsorbents. , With regard to the fabrication of Cu(I) π-complexation adsorbents, bulk cuprous chemicals usually show a low efficiency. In order to create a great number of exposed active sites, a general approach is to load Cu(I) on porous materials with a large surface area, for example, zeolites, − mesoporous silica materials, , and metal–organic frameworks (MOFs). − Notably, direct incorporation of Cu(I) on porous materials needs an elaborative operation under an inert atmosphere, for the reason that the Cu(I) sites can be easily oxidized, and then will lose its reactivity. Thus, a two-step process is preferable via (i) introduction of Cu(II) onto the porous materials, such as active carbon, , zeolites, , and mesoporous silica materials, − and (ii) reduction of Cu(II) to active Cu(I) sites.…”

Section: Introductionmentioning

confidence: 99%

“…17,18 With regard to the fabrication of Cu(I) π-complexation adsorbents, bulk cuprous chemicals usually show a low efficiency. In order to create a great number of exposed active sites, a general approach is to load Cu(I) on porous materials with a large surface area, for example, zeolites, 19−21 mesoporous silica materials, 22,23 and metal−organic frameworks (MOFs). 24 Notably, direct incorporation of Cu(I) on porous materials needs an elaborative operation under an inert atmosphere, for the reason that the Cu(I) sites can be easily oxidized, and then will lose its reactivity.…”

Section: ■ Introductionmentioning

confidence: 99%

Cuprous/Vanadium Sites on MIL-101 for Selective CO Adsorption from Gas Mixtures with Superior Stability

Wen

Shi

et al. 2019

ACS Sustainable Chem. Eng.

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For practical applications Cu(I) π-complexation adsorption demands both a high performance and a good stability. In this work, we simultaneously incorporated copper and vanadium into a typical metal–organic framework (MOF) of MIL-101. Thanks to the assistance of V, selective reduction of Cu(II) to Cu(I) was efficiently realized at a low temperature of 250 °C. Compared with the common reduction temperature of over 450 °C, the temperature in this work was dramatically reduced. The low temperature can guarantee the structural integrity of the MIL-101 support during the reduction procedure, since the structure of MIL-101 will collapse at or over 300 °C. We also demonstrated that the resulting CuVM adsorbents exhibited superior performances to those of pristine MIL-101 on CO separation from N2 and H2 mixtures, in terms of both the capacity and the selectivity. The utmost capacity of 29.2 cm3·g–1 at 100 kPa for CO adsorption was achieved on 2.5CuVM, which significantly surpassed the capacity on MIL-101 (12.2 cm3·g–1). With regards to the selectivity, 2.5CuVM showed a much better performance than MIL-101 as well, with that of 70.1 for CO/N2 and 641.7 for CO/H2. Moreover, in traditional π-complexation adsorbents, Cu(I) was easily oxidized to Cu(II) and thus lost the activity. In this study, the cuprous sites on 2.5CuVM material showed a remarkable oxygen-resistant ability under exposure to atmospheric air for about 2 weeks. This study provides a new avenue for the design and fabrication of Cu(I) π-complexation adsorbents with both high performances and excellent oxygen resistance.

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“…So, fortunately, the regeneration performance of adsorbents via π-complexation is superior to those of chemical adsorbents, and π-complexation adsorbents have higher adsorption capacity in desulfurization than physical adsorbents. Recently, much research has been reported that Cu + and Ag + dispersed on different supports such as zeolites, − , alumina, and carbon − are efficient in adsorptive desulfurization because of the π-complexation.…”

Section: Introductionmentioning

confidence: 99%

“…So, fortunately, the regeneration performance of adsorbents via πcomplexation is superior to those of chemical adsorbents, and π-complexation adsorbents have higher adsorption capacity in desulfurization than physical adsorbents. Recently, much research has been reported that Cu + and Ag + dispersed on different supports such as zeolites, [8][9][10][11]35 alumina, 12 and carbon 15−21 46 The MOF (denoted as Cu-BTC-DMA here) shows a cubic structure with a chloride-centered square-planar [Cu 4 Cl] 7+ cluster linked with the 1,3,5-benzenetricarboxylate ligands. A three-dimensional anionic (3D) framework is present with the permanent porosity compensated by (CH 3 ) 2 NH 2 + cation for charge balance.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Desulfurization via π-Complexation with Ag⁺-Exchanged Anionic Metal–Organic Framework

Cao

Cui

et al. 2019

Ind. Eng. Chem. Res.

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The anionic metal–organic framework (Cu-BTC-DMA) was synthesized by the hydrothermal method. The extra-framework (CH3)2 NH2 + cations in Cu-BTC-DMA structure are movable and can be easily exchanged with Ag+. The Ag+-exchanged Cu-BTC-DMA was characterized through FT-IR, XRD, SEM, ICP, and N2 adsorption–desorption isotherms. The adsorption properties of Ag+-exchanged Cu-BTC-DMA with different Ag cation content were studied for the model fuel with different concentrations of thiophene. The results show that the Ag+-exchanged adsorbents show higher adsorption capacity for thiophene, which was ascribed to the introduction of Ag+ into Cu-BTC-DMA. Thiophene can interact with Ag+ via π-complexation. In addition, the Ag@Cu-BTC-DMA still shows the good performance of adsorption desulfurization in the presence of toluene. Ag@Cu-BTC-DMA (0.02 M) shows the highest adsorption capacity among the three adsorbents due to the high Ag+ amount and the almost integrated crystalline structure. In the process of regeneration, approximately 86% of the adsorptive capacity of Ag@Cu-BTC-DMA (0.02 M) can be recovered after four cycles.

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Adsorptive desulfurization of fuels with Cu(I)/SBA-15 via low-temperature reduction

Cited by 32 publications

References 34 publications

Functionalized expanded corn starch‐anchored Cu(I): An efficient and recyclable catalyst for oxidation of 5‐hydroxymethylfurfural to 2,5‐diformylfuran

Functionalized expanded corn starch‐anchored Cu(I): An efficient and recyclable catalyst for oxidation of 5‐hydroxymethylfurfural to 2,5‐diformylfuran

Cuprous/Vanadium Sites on MIL-101 for Selective CO Adsorption from Gas Mixtures with Superior Stability

Adsorption Desulfurization via π-Complexation with Ag⁺-Exchanged Anionic Metal–Organic Framework

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Adsorptive desulfurization of fuels with Cu(I)/SBA-15 via low-temperature reduction

Cited by 32 publications

References 34 publications

Functionalized expanded corn starch‐anchored Cu(I): An efficient and recyclable catalyst for oxidation of 5‐hydroxymethylfurfural to 2,5‐diformylfuran

Functionalized expanded corn starch‐anchored Cu(I): An efficient and recyclable catalyst for oxidation of 5‐hydroxymethylfurfural to 2,5‐diformylfuran

Cuprous/Vanadium Sites on MIL-101 for Selective CO Adsorption from Gas Mixtures with Superior Stability

Adsorption Desulfurization via π-Complexation with Ag+-Exchanged Anionic Metal–Organic Framework

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Product

Resources

About

Adsorption Desulfurization via π-Complexation with Ag⁺-Exchanged Anionic Metal–Organic Framework