Hemicellulose hydrolysis catalysed by solid acids

Piera Demma Cara; Mario Pagliaro; Ahmed Elmekawy

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Hemicellulose hydrolysis catalysed by solid acids

机译：半纤维素水解由固体酸催化

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Depolymerising hemicellulose into platform sugar molecules is a key step in developing the concept of an integrated biorefinery. This reaction is traditionally catalysed by either enzymes or homogeneous mineral acids. We compared various solid catalysts for hemicellulose hydrolysis, running reactions in water, under neutral pH and relatively mild temperature and pressure (120 °C and 10 bar) conditions. Sulphonated resins are highly active, but they leach out sulphonic groups. Sulphonated silicas are less active, but more stable. They have weakly and strongly bound sites and the strongly bound ones do not leach. Zeolites are moderately active and stable. Among them, H-ferrierite especially, despite its small pores, exhibited high activity as well as good recyclability.

机译：将半纤维素解放为平台糖分子是开发综合生物精制概念的关键步骤。传统上，该反应是由酶或均质无酸盐催化的。我们比较了各种固体催化剂的半纤维素水解，在中性pH值以及相对温和的温度和压力（120°C和10 bar）条件下的水解，在水中运行反应。磺化树脂具有很高的活性，但它们会渗出硫酸基团。磺化硅的活性较小，但更稳定。它们具有弱和强烈的站点，并且强烈绑定的站点不会浸出。沸石是中等活跃和稳定的。其中，尤其是h-铁烯酸盐，尽管毛孔很小，但表现出较高的活性和良好的可回收性。

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来源
《Catalysis science & technology》 |2013年第8期|2057-2061|共5页
作者
Piera Demma Cara; Mario Pagliaro; Ahmed Elmekawy;
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作者单位

Istituto per lo Studio dei Materiali Nanostrutturati, CNR, via U. La Malfa 153, 90146 Palermo, Italy;

Van't Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94157, 1090GD Amsterdam, The Netherlands.;

Materials and Catalysis Research Centre, Dept. of Chemical and Biological Sciences, University of Huddersfield, Queensgate HD1 3DH, UK;

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原文格式 PDF
正文语种英语
中图分类汉语教学;
关键词
inorganic acids; SULPHONIC ACID GROUP; acidsSOLID CATALYSTHemicellulosehydrolysisAlkanesulfonates;

机译：无机酸;磺酸基;酸性溶质纤维素纤维纤维溶解分解烷烷基磺酸盐;

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Hemicellulose hydrolysis catalysed by solid acids

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