Effect Of Phenol Concentrations On The
Condensation Reaction During The Liquefaction
Of Waste Woody Materials With Phenol
Author(s)
Q. Wang, N. Mitsumura, Q. Chen, P. Apar, Q. Qian, L. Gui,
H. Niida, H. Kurokawa, K. Sekiguchi & K. Sugiyama
Abstract
The wood liquefaction technique using phenol is the developing method to
utilize the waste woody materials for phenolic resin. However, the condensation
reaction is one of the problems for popularizing the wood liquefaction technique.
The lowering of the phenol concentrations in the wood liquefaction process is
thought to be the cause of the condensation reaction. To find the reason and
examine our hypothesis, woody meals (sawdust) were liquefied under the
different conditions using phenol in the presence of sulfuric acid as a catalyst.
Under the intensive liquefaction conditions such as higher reaction temperatures
and more catalyst contents and smaller particle sizes of woody meal, remarkable
condensation reaction was observed. It was found that the phenol concentrations
were approximately 8% lower at the end of the reaction and became stable when
the condensation reaction took place. It was indicated that the lowering of the
phenol concentration suppressed the liquefaction reaction and prompted the
condensation reaction. However, it was considered that the wood liquefaction
also almost stopped when the condensation reaction was hardly observed.
According to all results, it is suggested that the cause of the condensation
reaction is not only due to the lowering of the phenol concentrations but also due
to the decomposing of liquefied woody constituents into low molecules under the
intense liquefaction.
Keywords: waste woody materials, liquefaction, phenol, condensation
mechanism, high performance liquid chromatography.
Keywords
waste woody materials, liquefaction, phenol, condensation
mechanism, high performance liquid chromatography.
Related Book
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