文章基本信息

标题：Controlling Deoxygenation Pathways in Catalytic Fast Pyrolysis of Biomass and Its Components by Using Metal-Oxide Nanocomposites
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作者：Anqing Zheng ; Zhen Huang ; Guoqiang Wei 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2020
卷号：23
期号：1
页码：1-28
DOI：10.1016/j.isci.2019.100814
语种：English
出版社：Elsevier
摘要：SummarySelectively breaking the C-O bonds within biomass during catalytic fast pyrolysis (CFP) is desired, but extremely challenging. Herein, we develop a series of metal-oxide nanocomposites composed of W, Mo, Zr, Ti, or Al. It is demonstrated that the nanocomposites of WO3-TiO2-Al2O3exhibit the highest deoxygenation ability during CFP of lignin, which can compete with the commercial HZSM-5 catalyst. The nanocomposites can selectively cleave the C-O bonds within lignin-derived phenols to form aromatics by direct demethoxylation and subsequent dehydration. Moreover, the nanocomposites can also achieve the selective breaking of the C-O bonds within xylan and cellulose to form furans by dehydration. The Brønsted and Lewis acid sites on the nanocomposites can be responsible for the deoxygenation of lignin and polysaccharides, respectively. This study provides new insights for the rational design of multifunctional catalysts that are capable of simultaneously breaking the C-O bonds within lignin and polysaccharides.Graphical AbstractDisplay OmittedHighlights•WO3-TiO2-Al2O3(WTA) can selectively break the C-O bonds within biomass•Lignin and polysaccharides are respectively converted into aromatics and furans•Brønsted and Lewis acid sites of WTA are responsible for the C-O bond cleavagesCatalysis; Biomass; Chemical Engineering