Solid Phase Extraction of Bio-Oil Model Compounds and Lignin-Derived Bio-Oil Using Amine-Functionalized Mesoporous Silicas
Solid Phase Extraction of Bio-Oil Model Compounds and Lignin-Derived Bio-Oil Using Amine-Functionalized Mesoporous Silicas
复制标题
使用胺官能化介孔二氧化硅固相萃取生物油模型化合物和木质素衍生的生物油
DOI：
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发表时间：
2018
影响因子：
8.4
通讯作者：
R. Baker
中科院分区：
文献类型：
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作者：
B. Sedai;Jinsha Zhou;Nansi Fakhri;A. Sayari;R. Baker
木质素衍生的热解生物油是烷基酚的丰富来源，如果能够开发出可行的分离方法，则可以找到应用。在这项工作中，生物油模型化合物和木质素衍生的生物油被用来评估市售的硅胶和正相胺官能化二氧化硅，以及三种不同的胺官能化介孔二氧化硅，作为吸附剂。比较了所有材料对12种生物油模型化合物的最大吸附量。邻苯二酚表现出最大的保留（193.3 mg/g，1.75 mmol/g）的存在下，最好的介孔吸附剂，而体积较大的愈创木酚和二苯甲酮没有表现出任何保留。最好的吸附剂也被应用于分离存在于木质素衍生的生物油中的三组酚类化合物，如通过GC/MS分析所确定的，即，（i）甲氧基苯酚和烷基甲氧基苯酚，（ii）苯酚、烷基苯酚和羟基酸，以及（iii）邻苯二酚。吸附研究表明，接枝三胺官能化的聚苯胺具有良好的吸附性能。
Lignin-derived pyrolysis bio-oils are a rich source of alkylphenols that could find application if a feasible separation method could be developed. In this work, bio-oil model compounds and lignin-derived bio-oil were used to evaluate commercially available silica gel and normal phase amine-functionalized silica, as well as three different amine-functionalized mesoporous silicas, as adsorbents. The adsorption capacities of all materials at maximum retention of 12 bio-oil model compounds were compared. Catechol showed maximum retention (193.3 mg/g, 1.75 mmol/g) in the presence of the best mesoporous absorbent, while bulkier guaiacol and benzophenone did not show any retention. The best adsorbent was also applied for the separation of three groups of phenolic compounds present in the lignin-derived bio-oil, as determined by GC/MS analysis, namely, (i) methoxyphenols and alkylmethoxyphenols, (ii) phenol, alkylphenols, and hydroxyacids, and (iii) catechol. Adsorption studies showed that grafted triamine-funct...