{"id":3020,"date":"2017-01-27T22:59:41","date_gmt":"2017-01-27T14:59:41","guid":{"rendered":"http:\/\/woodrefinery.com\/zhenfang\/?p=3020"},"modified":"2017-04-16T11:12:10","modified_gmt":"2017-04-16T03:12:10","slug":"direct-conversion-of-carbohydrates-to-methyl-levulinate-catalyzed-by-acid-base-bifunctional-zirconia-zeolites","status":"publish","type":"post","link":"https:\/\/woodrefinery.com\/zhenfang\/direct-conversion-of-carbohydrates-to-methyl-levulinate-catalyzed-by-acid-base-bifunctional-zirconia-zeolites\/","title":{"rendered":"Direct conversion of carbohydrates to methyl levulinate catalyzed by acid-base bifunctional zirconia-zeolites"},"content":{"rendered":"

Direct conversion of carbohydrates to methyl levulinate catalyzed by acid-base bifunctional zirconia-zeolites<\/strong> \"Presentation1\"<\/strong><\/p>\n

Acid-base paired sites of ZrY hybrids with increased pore sizes are efficient for sugar isomerization and downstream reactions, while the local enhanced microwave irridation (MI) with zirconia is responsible for high sugar conversion, thus facilitating the one-pot multi-step catalytic process to produce ML in high yields (~70% from glucose).<\/p>\n

Dr. Hu Li, a postdoctoral student, supervised by Profs. Song Yang (Guizhou university) and Zhen Fang prepared a series of metal-zeolite hybrids by impregnation and deposition-precipitation methods and charaterized with different techniques. Catalytic performance of these catalysts on microwave-assisted conversion of selected carbohydrates to the fuel component methyl levulinate (ML) in methanol was studied. It was demonstrated that metal oxide content\/type and acid-base bifunctionality were closely correlated with substrate conversion and ML yield, respectively. Among various as-prepared catalysts, zirconia-zeolite hybrid ZrY6(0.5) with moderate acid-base site content (0.97 & 0.08 mmol g\u22121<\/sup>), high stability and porosity (average mesopore diameter: 6.2 nm) exhibited superior catalytic activity. At 180 \u00baC, around 67-73%, 78%, 53% and 27% yields of ML could be achieved from monosaccharides (e.g., glucose, mannose and galactose), sucrose, starch and cellulose, respectively. The Zr-Y6(0.5) hybrid exhibited good stability, and could be reused for five times with ML yields of ><\/u> 63% from glucose.<\/p>\n

The study was published:<\/p>\n

H Li, Zhen Fang*<\/strong>, J Luo, S Yang, Direct Conversion of Biomass Components to the Biofuel Methyl Levulinate Catalyzed by Acid-Base Bifunctional Zirconia-Zeolites, Applied Catalysis B: Environmental<\/u>, 200<\/strong>, 182\u2013191 (2017<\/strong>).<\/p>\n

—————————————————————<\/p>\n

\u9178<\/strong>–<\/strong>\u78b1\u53cc\u529f\u80fd\u6c27\u5316\u9506<\/strong>-\u5206\u5b50\u7b5b\u76f4\u63a5\u50ac\u5316\u8f6c\u5316\u78b3\u6c34\u5316\u5408\u7269\u4e3a\u4e59\u9170\u4e19\u9178\u7532\u916f\u751f\u7269\u71c3\u6599<\/strong><\/p>\n

\u77f3\u5316\u8d44\u6e90\u7684\u8fc7\u5ea6\u4f7f\u7528\u5f80\u5f80\u4f1a\u9020\u6210\u73af\u5883\u6c61\u67d3\u3001\u5168\u7403\u6c14\u5019\u53d8\u6696\u7b49\u95ee\u9898\uff0c\u751f\u7269\u8d28\u4f5c\u4e3a\u4e00\u79cd\u53ef\u518d\u751f\u7684\u6709\u673a\u78b3\u6e90\u5728\u5236\u5907\u751f\u7269\u80fd\u6e90\u548c\u6709\u673a\u5316\u5b66\u54c1\u65b9\u9762\u8868\u73b0\u51fa\u6781\u5927\u7684\u5e94\u7528\u524d\u666f\u3002\u8fd1\u5e74\u6765\uff0c\u4e59\u9170\u4e19\u9178\u7532\u916f\u4f5c\u4e3a\u7b2c\u4e8c\u4ee3\u751f\u7269\u80fd\u6e90\u53d7\u5230\u5e7f\u6cdb\u7684\u7814\u7a76\u548c\u5173\u6ce8\uff0c\u4f46\u5b58\u5728\u53cd\u5e94\u65f6\u95f4\u957f\u3001\u50ac\u5316\u4f53\u7cfb\u96be\u91cd\u590d\u5229\u7528\u7b49\u4e0d\u8db3\u3002\u6700\u8fd1\uff0c\u56fd\u9645\u8457\u540d\u5b66\u672f\u671f\u520aApplied Catalysis B: Environmental\uff0c\u53d1\u8868\u4e86\u6211\u6821\u751f\u7269\u71c3\u6599\u4e00\u9879\u6700\u65b0\u7814\u7a76\u6210\u679c\uff0c\u8bba\u6587\u9898\u4e3a\u201cDirect Conversion of Biomass Components to the Biofuel Methyl Levulinate Catalyzed by Acid-Base Bifunctional Zirconia-Zeolites\u201d\uff0c\u7b2c\u4e00\u7f72\u540d\u5355\u4f4d\u4e3a\u5357\u4eac\u519c\u4e1a\u5927\u5b66\uff0c\u7b2c\u4e00\u4f5c\u8005\u4e3a\u6211\u6821\u5de5\u5b66\u9662\u535a\u58eb\u540e\u674e\u864e\uff0c\u901a\u8baf\u4f5c\u8005\u4e3a\u6211\u6821\u65b9\u771f\u6559\u6388\u3002<\/p>\n

\u5de5\u5b66\u9662\u519c\u4e1a\u673a\u68b0\u7cfb\u751f\u7269\u80fd\u6e90\u7ec4\u535a\u58eb\u540e\u674e\u864e\u5728\u6768\u677e\u6559\u6388\uff08\u8d35\u5dde\u5927\u5b66\uff09\u548c\u65b9\u771f\u6559\u6388\u7684\u6307\u5bfc\u4e0b\uff0c\u7528\u6d78\u6e0d\u6cd5\u548c\u6c89\u79ef\u6c89\u6dc0\u6cd5\u5236\u5907\u4e86\u4e00\u7cfb\u5217\u91d1\u5c5e-\u6cb8\u77f3\u6df7\u5408\u7269\uff0c\u4f5c\u4e3a\u50ac\u5316\u5242\uff0c\u5e76\u5bf9\u5176\u5316\u5b66\u548c\u7269\u7406\u7ed3\u6784\u7528\u4e0d\u540c\u7684\u5206\u6790\u6280\u672f\u65b9\u6cd5\u8fdb\u884c\u4e86\u6d4b\u5b9a\u3002\u5728\u7532\u9187\u4e2d\u5229\u7528\u8fd9\u4e9b\u50ac\u5316\u5242\u548c\u5fae\u6ce2\u7167\u5c04\u6280\u672f\uff0c\u50ac\u5316\u8f85\u52a9\u8f6c\u5316\u751f\u7269\u8d28\u4e3b\u8981\u7ec4\u5206-\u78b3\u6c34\u5316\u5408\u7269\uff0c\u4e3a\u4e59\u9170\u4e19\u9178\u7532\u916f\u71c3\u6599\u8fc7\u7a0b\uff0c\u8fdb\u884c\u4e86\u5b9e\u9a8c\u7814\u7a76\u3002\u7ed3\u679c\u8868\u660e\uff0c\u91d1\u5c5e\u6c27\u5316\u7269\u7684\u542b\u91cf\/\u7c7b\u578b\u548c\u9178-\u78b1\u53cc\u529f\u80fd\uff0c\u4e0e\u539f\u6599\u7684\u8f6c\u5316\u7387\u548c\u4e59\u9170\u4e19\u9178\u7532\u916f\u4ea7\u7387\u5bc6\u5207\u76f8\u5173\u3002\u5728\u5404\u79cd\u5408\u6210\u7684\u50ac\u5316\u5242\u4e2d\uff0c\u6c27\u5316\u9506-\u6cb8\u77f3\u6df7\u5408\u7269ZrY6(0.5)\u5177\u6709\u9002\u5ea6\u7684\u9178-\u78b1\u542b\u91cf(0.97 & 0.08 mmol g\u2212<\/sup>1<\/sup>)\u3001\u9ad8\u7684\u7a33\u5b9a\u6027\u548c\u9ad8\u5b54\u9699\u5ea6 (\u5e73\u5747\u5b54\u76f4\u5f84\ufe306.2\u7eb3\u7c73)\u5e76\u8868\u73b0\u51fa\u4f18\u8d8a\u7684\u50ac\u5316\u6d3b\u6027\u3002\u5728 180 \u00baC\u6761\u4ef6\u4e0b\uff0c\u53ef\u4ee5\u5206\u522b\u4ece\u5355\u7cd6\uff08\u5982\u8461\u8404\u7cd6\u3001\u7518\u9732\u7cd6\u3001\u534a\u4e73\u7cd6\uff09\u3001\u8517\u7cd6\u3001\u6dc0\u7c89\u548c\u7ea4\u7ef4\u7d20\u539f\u6599\u5408\u6210\u5f97\u523067-73%\u5de6\u53f3\uff0c78%\u300153%\u548c27%\u7684\u4e59\u9170\u4e19\u9178\u7532\u916f\u4ea7\u7387\u3002Zr-Y6(0.5)\u578b\u50ac\u5316\u5242\u8868\u73b0\u51fa\u826f\u597d\u7684\u7a33\u5b9a\u6027\uff0c\u53ef\u4ee5\u91cd\u590d\u4f7f\u7528\u4e94\u6b21\uff0c\u5e76\u53ef\u4ece\u8461\u8404\u7cd6\u4e2d\u5408\u6210\u9ad8\u4ea7\u7387\uff08>63%\uff09\u7684\u4e59\u9170\u4e19\u9178\u7532\u916f\u3002<\/p>\n

\u8be6\u60c5\u53ef\u89c1\uff1a<\/p>\n

H Li, Zhen Fang*<\/strong>, J Luo, S Yang, Direct Conversion of Biomass Components to the Biofuel Methyl Levulinate Catalyzed by Acid-Base Bifunctional Zirconia-Zeolites, Applied Catalysis B: Environmental<\/u>, 200<\/strong>, 182\u2013191 (2017<\/strong>).<\/p>\n","protected":false},"excerpt":{"rendered":"

Direct conversion of carbohydrates to methyl levulinate […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts\/3020"}],"collection":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/comments?post=3020"}],"version-history":[{"count":4,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts\/3020\/revisions"}],"predecessor-version":[{"id":3085,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts\/3020\/revisions\/3085"}],"wp:attachment":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/media?parent=3020"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/categories?post=3020"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/tags?post=3020"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}