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一种有效的混合异相催化剂用于脱硫:过钨酸盐@金属有机骨架。

An Effective Hybrid Heterogeneous Catalyst to Desulfurize Diesel: Peroxotungstate@Metal-Organic Framework.

机构信息

REQUIMTE/LAQV & Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal.

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Material Science, Northwest University, Xi'an 710127, Shanxi, China.

出版信息

Molecules. 2020 Nov 24;25(23):5494. doi: 10.3390/molecules25235494.

DOI:10.3390/molecules25235494
PMID:33255274
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7727652/
Abstract

A peroxotungstate composite comprising the chromium terephthalate metal-organic framework MIL-101(Cr) and the Venturello peroxotungstate [PO{WO(O)}] (PW) has been prepared by the impregnation method. The PW@MIL-101(Cr) composite presents high catalytic efficiency for oxidative desulfurization of a multicomponent model diesel containing the most refractory sulfur compounds present in real fuels (2000 ppm of total S). The catalytic performance of this heterogeneous catalyst is similar to the corresponding homogeneous PW active center. Desulfurization efficiency of 99.7% was achieved after only 40 min at 70 °C using HO as an oxidant and an ionic liquid as an extraction solvent ([BMIM]PF, 2:1 model diesel/[BMIM]PF). High recycling and reusing capacity was also found for PW@MIL-101(Cr), maintaining its activity for consecutive oxidative desulfurization cycles. A comparison of the catalytic performance of this peroxotungstate composite with others previously reported tungstate@MIL-101(Cr) catalysts indicates that the presence of active oxygen atoms from the peroxo groups promotes a higher oxidative catalytic efficiency in a shorter reaction time.

摘要

一种包含铬对苯二甲酸金属有机骨架 MIL-101(Cr)和 Venturello 过氧钨酸盐 [PO{WO(O)}] (PW)的过氧钨酸盐复合材料通过浸渍法制备而成。PW@MIL-101(Cr) 复合材料对含有真实燃料中存在的最具挑战性的硫化合物的多组分模型柴油的氧化脱硫具有很高的催化效率(总硫含量为 2000ppm)。这种多相催化剂的催化性能与相应的均相 PW 活性中心相似。在 70°C 下仅用 40 分钟,以 HO 为氧化剂,离子液体为萃取溶剂 ([BMIM]PF,2:1 模型柴油/[BMIM]PF),即可达到 99.7%的脱硫效率。PW@MIL-101(Cr) 还具有高的循环和重复使用能力,在连续的氧化脱硫循环中保持其活性。将这种过氧钨酸盐复合材料的催化性能与之前报道的过氧钨酸盐@MIL-101(Cr) 催化剂进行比较表明,过氧基团中的活性氧原子的存在促进了更高的氧化催化效率,反应时间更短。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/ed936167c0f6/molecules-25-05494-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/6eaca83d5983/molecules-25-05494-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/6bef8761137d/molecules-25-05494-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/9ec6ac3cf241/molecules-25-05494-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/c02cb6b9bc8c/molecules-25-05494-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/98436f4ff896/molecules-25-05494-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/6e2d02e2e1b0/molecules-25-05494-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/ed936167c0f6/molecules-25-05494-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/6eaca83d5983/molecules-25-05494-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/6bef8761137d/molecules-25-05494-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/9ec6ac3cf241/molecules-25-05494-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/c02cb6b9bc8c/molecules-25-05494-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/98436f4ff896/molecules-25-05494-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/6e2d02e2e1b0/molecules-25-05494-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f5f/7727652/ed936167c0f6/molecules-25-05494-g006.jpg

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