Production of high carbon number hydrocarbon fuels from a lignin-derived α-O-4 phenolic dimer, benzyl phenyl ether, via isomerization of ether to alcohols on high-surface-area silica-alumina aerogel catalysts
- Production of high carbon number hydrocarbon fuels from a lignin-derived α-O-4 phenolic dimer, benzyl phenyl ether, via isomerization of ether to alcohols on high-surface-area silica-alumina aerogel catalysts
- 윤지선; 이윤수; 류지혜; 김영아; 박은덕; 최재욱; 하정명; 서동진; 이현주
- Biomass; Lignin; Benzyl phenyl ether; Hydrodeoxygenation; Isomerization
- Issue Date
- Applied catalysis B, Environmental
- VOL 142-143, 668-676
- Two-step hydrodeoxygenation of benzyl phenyl ether (BPE), a lignin-derived phenolic dimer containingan α-O-4 linkage, was performed to produce high carbon number saturated hydrocarbons. The etherlinkage of BPE was first isomerized to alcohols of benzylphenols on the solid acid catalysts of silica(SA), alumina (AA), and silica-alumina aerogels (SAAs), which were further hydrodeoxygenated to sat-urated cyclic hydrocarbons on a silica-alumina-supported Ru catalyst. During the isomerization of BPE,noble-metal-free catalysts suppressed the formation of phenyl monomers but produced the phenolicdimers. SA, AA, and SAA-73 (Al/(Si + Al) = 0.73) exhibited negligible activity. However, SAA-38 and SAA-57 containing Al/(Si + Al) contents of 0.38 and 0.57, respectively, exhibited high catalytic activity amongthe prepared aerogel catalysts. The BPE conversion on SAA-38 reached 100% at a temperature range of100-150◦C. The Brönsted acid sites appear to be catalytic active sites. On the basis of the predominantisomerization of phenyl ether to phenols over ether decomposition on the SAAs, the following secondstep of hydrodeoxygenation (HDO) after the first step of isomerization of BPE produced deoxygenatedC13–19 cyclic hydrocarbons, as opposed to the saturated deoxygenated cyclic hydrocarbons producedtrhough a one-step reaction process with silica-alumina-supported Ru catalysts, demonstrating this to bea promising process for producing high carbon number hydrocarbons from lignin dimers and oligomers.
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