Production of ketones from pyroligneous acid of woody biomass pyrolysis over an iron-oxide catalyst
Production of ketones from pyroligneous acid of woody biomass pyrolysis over an iron-oxide catalyst
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DOI：
10.1016/j.fuel.2011.04.003
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发表时间：
2013-01-01
期刊：
影响因子：
7.4
通讯作者：
Masuda, Takao
中科院分区：
文献类型：
--
作者：
Mansur, Dieni;Yoshikawa, Takuya;Masuda, Takao
在623 ~ 723 K的蒸汽气氛下，采用氧化锆负载的氧化铁催化剂对木质生物质慢热解副产物热解酸进行了催化升级，研究了ZrO2- feox催化剂中ZrO2含量对催化活性和酮收率的影响。结果表明，在ZrO2-FeOX催化剂上，热解酸中的羟基丙酮和羧酸（乙酸和丙酸）通过酮化反应转化为脂肪族酮（丙酮和2-丁酮）。然而，也观察到金属杂质如钾(K)和镁（Mg）对反应的抑制作用。利用离子交换树脂可以在不改变有机成分的情况下将这些金属杂质从热解酸中去除。金属杂质的去除是提高酮收率的有效方法。此外，随着W/F值（W：催化剂用量，F：进料中热解酸的流量）的增大，酮收率可提高至约30 C mol%，液态产品中的酮分数达到55 C mol%。(C) 2011 Elsevier Ltd.版权所有。
Catalytic upgrading of pyroligneous acid, by-product from slow pyrolysis of woody biomass for char production, was carried out using zirconia-supported iron-oxide catalysts under a steam atmosphere at temperatures ranging from 623 to 723 K, and the effect of ZrO2 content in the ZrO2-FeOX catalysts on catalytic activity and ketone yields was investigated. It was demonstrated that hydroxyacetone and carboxylic acids (acetic and propionic acids) in the pyroligneous acid were converted into aliphatic ketones (acetone and 2-butanone) via a ketonization reaction over the ZrO2-FeOX catalyst. However, reaction inhibition by metal impurities in the pyroligneous acid such as potassium (K) and magnesium (Mg) was also observed. These metal impurities could be removed from the pyroligneous acid without changing the organic composition by using an ion-exchange resin. The removal of the metal impurities was effective in increasing the ketone yields. Moreover, as the W/F value (W: Amount of catalyst, and F: Flow rate of the pyroligneous acid in the feed) increased, the ketone yield increased up to approximately 30 C mol%, and the ketone fraction in the liquid product reached 55 C mol%. (C) 2011 Elsevier Ltd. All rights reserved.