Catalytic production of γ-valerolactone from xylose over delaminated Zr-Al-SCM-1 zeolite via a cascade process

Li, Xiangcheng; Yuan, Xiaohong; Xia, Guopeng; Liang, Jun; Wang, Zhendong; Yang, Weimin

doi:10.1016/j.jcat.2020.10.004

Cited by 51 publications

(35 citation statements)

References 59 publications

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“…Sn-MCM-22, Zr-SCM-1 (Cp 2 ZrCl 2 ), and Ti-SCM-1 (Cp 2 TiCl 2 ) zeolite was prepared similarly to Sn-SCM-1 zeolite. 52 Sn-Beta was synthesized based on previous work. 22 SnO 2 /H-SCM-1 and SnO 2 /H-MCM-22 were synthesized by the incipient wetness impregnation method (2 wt % content of Sn).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Postsynthesis of Delaminated MWW-Type Stannosilicate as a Robust Catalyst for Sugar Conversion to Methyl Lactate

Yuan

Xia

et al. 2021

Ind. Eng. Chem. Res.

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Through the dealumination of SCM-1 and incorporation of Sn species, a new MWW-type stannosilicate Sn-SCM-1 with a partially delaminated layered structure was successfully synthesized. The detailed characterizations revealed the well preservation of the precursor SCM-1 zeolite network and tetrahedral incorporations of Sn ions. The delaminated double-layered structure of Sn-SCM-1 with super-large external surface areas offered massive approachable reactive sites and facilitated the diffusion of biomass macromolecules. Compared with Sn-MCM-22 and Sn-Beta zeolites, Sn-SCM-1 zeolite showed superior catalytic efficiency in yielding methyl lactate from glucose and excellent recyclability in the cycle test.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Postsynthesis of Delaminated MWW-Type Stannosilicate as a Robust Catalyst for Sugar Conversion to Methyl Lactate

Yuan

Xia

et al. 2021

Ind. Eng. Chem. Res.

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“…Furthermore, the special interaction between ETA and MWW framework is also confirmed by in situ FT-IR using ETA as the probe. Generally, the band at 3747 cm –1 is assigned to the vibrations of external surface Si–OH groups, and the most intense band at 3620 cm –1 is associated with Si–OH-Al groups. ,− After activation of the calcined sample at 300 °C, the cover of adsorbed water to peaks of −OH is eliminated, and ETA is in situ adsorbed at ambient temperature. The recovery of bands at 3747 and 3620 cm –1 with the ramp-up of desorption temperature is used to monitor the interaction between ETA and MWW nanosheet.…”

Section: Resultsmentioning

confidence: 99%

“…As a special category of zeolites with layered precursors, such as MWW, FER, NSI, *-SVY, two complementary methods can be adopted to obtain mono/oligo-layer materials including precursor modification (top-down route) and direct synthesis (bottom-up route). Delightful materials like MIT-1, DS-ITQ-2, SCM-1, and SL-MWW are achieved by direct synthesis though it can only be used for a specific topological framework, whereas the readily available and affordable organic template is alsoa challenge. Exfoliation of layered precursors is another promising process for achieving desired mono/oligo zeolite nanosheets.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Exfoliation and Functionalization of Zeolite Nanosheets for Protection of Paper-Based Relics

Zhang

Zhao

Zhang

et al. 2021

ACS Appl. Nano Mater.

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zeolite nanosheets have emerged in many applications due to their structure/surface properties through functional designing. However, the effective and low-cost preparation of functional mono/oligo-layer 2D zeolite and its application in interdiscipline fields still remain a challenge. Here, we report a facile and efficient method of liquid exfoliation by using ethanolamine (ETA) for one-pot liquid exfoliation and surface functionalization. Strikingly, the resultant 2D oligolayer MWW zeolite (denoted as ETA-OL-MWW) has discretely dispersed nanosheets with a well-maintained framework, interface-grafted ETA molecules, and accessible functional sites. The interaction between MWW nanosheets and ETA molecules is characterized and verified as a key factor to achieve, simultaneously, surface functionalization of nanosheets and high dispersion in water−organic solvents. Meanwhile, the stable colloidal ETA-OL-MWW is favorable for functional membrane fabrication via solution-based processing like spin-coating. Based on these features, we pioneer the interdisciplinary use of colloidal ETA-OL-MWW as a multifunctional protective agent for paper-based relics, which is much desirable in the field of cultural heritage preservation. The sufficient, mild, and accessible base sites of ETA-OL-MWW benefit safe deacidification and antiaging but do not damage the original nature of paper relics and color of alkali-sensitive pigments. Moreover, the paper mechanical strength is improved owing to the 2D structure and film-forming property of ETA-OL-MWW, while its antibacteria/fungus and antioxidation for paper relics are revealed and assisted by ETA-functionalized surface. This work is conducive to broadening methods and ideas for exfoliating and functionalizing MWW zeolite and has the significance of designing zeolite-based composite material with interdisciplinary applications.

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“…The OOMC-SO 3 H and Al-OCS-0.1 samples generated three desorption peaks in the ranges of 120-160, 350-400, and 650-780 °C, respectively, corresponding to weak, medium strong, and strong acid sites, respectively. 44 It can be seen from Table 1 that the total NH 3 desorption of the OOMC was higher than that of the OMC, as a consequence of the abundant oxygen-containing functional groups on the surface of the former material. The OOMC-SO 3 H showed a strong NH 3 desorption peak within the range of 350-400 °C and an increased total NH 3 desorption of 2.0 mmol g −1 , attributed to the abundant -SO 3 H groups on its surface.…”

Section: Nh 3 -Tpd Measurements and Py-ir Analysismentioning

confidence: 92%

“…The total NH 3 desorption amount of the Al-OCS-0.1 was 7.2 mmol g −1 and the concentration of medium strong acid sites on this specimen increased by 5.2 mmol g −1 as a result of the introduction of Al. 45 Li et al 44 studied the effect of Al amount on the acid content in a Zr-Al-SCM-1 zeolite catalyst and found that increasing the Al concentration increased the NH 3 uptake at medium strong acid sites.…”

Section: Nh 3 -Tpd Measurements and Py-ir Analysismentioning

confidence: 99%

Synthesis of ethyl levulinate from cellulose over a double acid site catalyst

Huang

Hao

2021

J of Chemical Tech & Biotech

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BACKGROUND: A novel double acid site solid catalyst (Al-OCS-0.1) having an ordered mesoporous structure was synthesized by grafting sulfonic acid groups on an oxidized ordered mesoporous carbon (OOMC) support and loading 10% Al 2 (SO 4 ) 3 .RESULT: Assessments using Field emission scanning electron microscopy, Transmission electron microscopy and X-ray diffraction showed that the OMC structure remained unchanged after the chemical modification and Al 2 (SO 4 ) 3 loading. The Brunauer-Emmett-Teller surface area and average pore size of Al-OCS-0.1 decreased to 181 m 2 g −1 and 7.1 nm after loading Al 2 (SO 4 ) 3 , respectively. Ammonia temperature-programmed desorption (NH 3 -TPD) and Pyridine adsorption infrared spectroscopy (Py-IR) demonstrated that Al-OCS-0.1 had abundant Brønsted and Lewis acid sites. The ammonia desorption of Al-OCS-0.1 increased from 2.0 to 7.2 mmol g −1 after loading Al 2 (SO 4 ) 3 .CONCLUSION: The Al-OCS-0.1 was used to catalyze the synthesis of ethyl levulinate from cellulose in ethanol and gave an extremely high yield of 50.8 mol% after 5 h at 200 °C.

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Catalytic production of γ-valerolactone from xylose over delaminated Zr-Al-SCM-1 zeolite via a cascade process

Cited by 51 publications

References 59 publications

Postsynthesis of Delaminated MWW-Type Stannosilicate as a Robust Catalyst for Sugar Conversion to Methyl Lactate

Postsynthesis of Delaminated MWW-Type Stannosilicate as a Robust Catalyst for Sugar Conversion to Methyl Lactate

One-Pot Exfoliation and Functionalization of Zeolite Nanosheets for Protection of Paper-Based Relics

Synthesis of ethyl levulinate from cellulose over a double acid site catalyst

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