Upgrading of Bio-Oil Using Supercritical 1-Butanol over a Ru/C Heterogeneous Catalyst: Role of the Solvent
Upgrading of Bio-Oil Using Supercritical 1-Butanol over a Ru/C Heterogeneous Catalyst: Role of the Solvent
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DOI：
10.1021/ef500968a
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发表时间：
2014-06
期刊：
影响因子：
5.3
通讯作者：
Xingmin Xu;Changsen Zhang;Yunpu Zhai;Yonggang Liu;Rui-qin Zhang;Xiao-yan Tang
中科院分区：
文献类型：
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作者：
Xingmin Xu;Changsen Zhang;Yunpu Zhai;Yonggang Liu;Rui-qin Zhang;Xiao-yan Tang
使用超临界 1-丁醇在 Ru/C 多相催化剂上对生物油进行升级。结果清楚地表明，与不使用溶剂或亚临界溶剂条件的升级生物油相比，使用超临界溶剂可以产生具有改进性能的升级产品。这些改进包括氧含量从 24.9 或 21.4 减少到 14.5%，高热值 (HHV) 从 27.9 或 30.5 增加到 32.0 MJ kg–1。最重要的改进是，通过使用超临界溶剂，碳沉积仅限制在 0.2%，而没有溶剂时碳沉积为 9.9%。因此，在提质过程中，有效地克服了结焦问题。溶剂具有多种作用：除了作为反应介质和反应物外，溶剂还促进氢溶解、保护催化剂、提高产物性能。超临界生物油提质的反应途径主要包括酯化、醚化、缩醛化、氢化……
Bio-oil was upgraded using supercritical 1-butanol over a Ru/C heterogeneous catalyst. The results clearly demonstrated that the use of a supercritical solvent resulted in an upgraded product with improved properties compared to upgraded bio-oil using no solvent or subcritical solvent conditions. These improvements included a decrease in oxygen content from 24.9 or 21.4 to 14.5% and an increase in the high heating value (HHV) from 27.9 or 30.5 to 32.0 MJ kg–1. The most important improvement is that carbon deposition was limited to only 0.2% through the use of a supercritical solvent compared to 9.9% without a solvent. Thus, coking was overcome effectively during the upgrading process. The solvent played several roles: in addition to being the reaction medium and reactant, the solvent facilitated hydrogen dissolution, protected the catalyst, and enhanced the product properties. The reaction pathways in supercritical bio-oil upgrading primarily include esterification, etherification, acetalization, hydrogen...