固体碱负载Ru催化山梨醇氢解制备低碳二元醇.pdf

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1、第65卷第7期化工学报、，01．65NO．72014年7月CIESCJournalJuly2014：cccc￡c：：：0究论文)：：33：：j)固体碱负载Ru催化山梨醇氢解制备低碳二元醇周静红，王雪峰，刘国才，隋志军，周兴贵，袁渭康(华东理工大学化学工程联合国家重点实验室，上海200237)摘要：采用羟基磷灰石和镁铝水滑石两种固体碱为载体制备了Ru催化剂，通过N2物理吸附、扫描电子显微镜、高分辨透射显微镜、x射线衍射分析表征了形貌和物理化学性能，并与纳米碳纤维负载的Ru催化剂(Ru／CNFs)在无碱促进剂及有碱促进剂存在下催化山梨醇氢解制备二元

2、醇的活性进行了比较。结果表明，固体碱负载的Ru催化剂，在无碱促进剂的条件下在山梨醇氢解中均表现出与Ru／CNFs相当的催化活性。其中镁铝水滑石负载的Ru催化剂在优化的制备条件下，其催化活性优于加入碱促进剂的Ru／CNFs催化体系，X,Z醇和丙二醇等目标产物选择性更高，副产物减少，同时还免除了碱助剂的后续分离和回收，具有良好的应用前景。关键词：生物质；Ru催化剂；固体碱；加氢；乙二醇；丙二醇DOI：10．3969~．issn．0438—1157．2014．07．037中图分类号：TQ426．65文献标志码：A文章编号：O438—1157(2014

3、)07—2761—09SolidbasesupportedRucatalystsforsorbitolhydrogenolysisZHOUJinghong，WANGXuefeng，LIUGuocai，SUIZhijun，ZHOUXinggui，YUANWeikang(StateKeyLaboratoryofChemicalEngineering,EastChinaUniversityofScienceandTechnology，Shanghai200237，China)Abstract：Hydrogenolysisofbiomass—deriv

4、edsorbitolintoethyleneandpropyleneglycols，analternativerouteforpetroleumbasedprocess，usuallytakesplaceovermetalcatalystwithabasepromoter．Thepresenceofsolublebasesintroducesadditionalproblemsfortheirseparationandrecovery，increasingthecomplexityandoperatingcostoftheprocess．Som

5、etimes，thesebaseadditivesresultintheformationofmoreside—products．Rusupposedonvarioussolidbasestofacilitatecatalystrecoveryandrecyclewasinvestigated．Rucatalystssupportedon2solidbases，hydrotalcite(HT)andhydroxyapatite，werepreparedandinvestigatedforsorbitolhydrogenolysisactivit

6、yinbase-freeaqueoussolution，andtheirperformancewascomparedwiththatofRucatalystsupportedoncarbonnanofibers(Ru／CNFs)，withandwithoutpromotionbyCaO．Thephysico—chemicalpropertiesofbothsupportsandthesupportedRucatalystswerecharacterizedbySEM，N2physisorption，XRD，TEMandC02一TPD．There

7、sultsindicatethatRuparticleswelldisperseonthebasicsupportandshowasgoodactivityasRu／CNFscatalystsinsorbitolhydrogenolysis．TheRucatalystusingHTcalcinedat500。Casasupportshowsthebestcatalyticperformancewithpromotedsorbitolconversion，higherselectivitytodesiredglycolsandfewerbypro

8、ducts．Asaresult，Ru／HTisbelievedtobeapromisingcatalystforsorbitolhydrogenoly