2.5 Decomposition of Lignin Model Compounds
0.1 g (0.467 mmol) lignin model compound, 0.02 g catalyst and 20 mL
water/ethanol (1:1) were added into the 100 mL stainless steel autoclave
(Beijing Shijisenlang Chemical Machinery Co., Ltd., China). The
autoclave was purged with N2 for three times and the
pressure was increased to 1MPa hydrogen. And the catalytic reaction was
carried out at 200 ºC for 5 h. After reaction, the mixture was filtered
to remove catalyst. The organic products were extracted with ethyl
acetate and analyzed by gas chromatography-mass spectrometry (GC-MS).
The conversion of model compounds and the yield of products were
calculated using the following Eq. (1) and Eq. (2):
Conversion (%) = WR/WS×100% (1)
Yield of product i (%) =ni /n m×100% (2)
Where WR is the weight of reacted after the
hydrogenolysis of lignin model compound; WS is the
weight of substrate (0.1 g); where ni andnm are the moles of product i and
initially added compound (0.467 mmol), respectively.