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首页> 外文会议>ACS National Meeting Exposition >ROLE OF THE BIFUNCTIONAL CATALYSTS IN THE HYDROPYROLYSIS OF LIGNIN
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ROLE OF THE BIFUNCTIONAL CATALYSTS IN THE HYDROPYROLYSIS OF LIGNIN

机译：双官能催化剂在木质素氢化下的作用

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Conversion of the lignin component of biomass into fuels and chemicals is one of the main challenges to the development of biorefineries. The recalcitrant structure of lignin presents many challenges to its decomposition that remain unresolved. In this context, hydropyrolysis is an option that offers important advantages: 1) the hydrogen environment promotes hydrogenation reactions that lead to the formation of hydrocarbons (drop-in fuels), 2) hydrogen radicals cap reactive intermediates from the thermal decomposition of lignin. These intermediates would otherwise recombine and produce significant amounts of char1. In this work, we use bifunctional catalysts with a metal supported on a zeolite to carry out the direct conversion of lignin into a mixture of aromatic hydrocarbons and cycloalkanes. These are major components of drop-in fuels, with cycloalkanes being especially important for jet fuels2. We hypothesize that the metal component catalyzes hydrogenation and deoxygenation reactions, and the zeolite component promotes deoxygenation reactions. We have synthesized Pd/HZSM-5 catalysts and compared its activity to HZSM-5 under a variety of hydropyrolysis conditions. The effect of catalyst-to-lignin ratio, hydrogen partial pressure and temperature was investigated.
机译：将生物量的木质素组分转化为燃料和化学品是生物料理发展的主要挑战之一。木质素的醋酸顽固结构对其仍未解决的分解具有许多挑战。在这种情况下，氢化溶解是一种提供重要优点的选择：1）氢环境促进氢化反应，导致烃（燃料燃料），2）氢自由基的反应性中间体从木质素的热分解中的热分解。否则这些中间体将重组并产生大量的CHAR1。在这项工作中，我们使用双官能催化剂与沸石上负载的金属进行金属，以将木质素的直接转化为芳烃和环烷烃的混合物中。这些是燃料中燃料的主要成分，环烷烃对喷射燃料2尤为重要。我们假设金属组分催化氢化和脱氧反应，沸石组分促进脱氧反应。我们已经合成了Pd / HZSM-5催化剂，并在各种氢化条件下将其活性与HZSM-5进行了比较。研究了催化剂至木质素比，氢气分压和温度的影响。

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