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Comparative study of the fast pyrolysis behavior of ginkgo, poplar, and wheat straw lignin at different temperatures
- Wang, Lei, Zhang, Ran, Li, Jian, Guo, Li, Yang, Haiping, Ma, Fuying, Yu, Hongbo
- Industrial crops and products 2018 v.122 pp. 465-472
- Fourier transform infrared spectroscopy, Ginkgo, Populus, biomass, gas chromatography-mass spectrometry, hardwood, lignin, liquids, nuclear magnetic resonance spectroscopy, pyrolysis, softwood, temperature, thermogravimetry, vanillin, volatilization, wheat straw
- Fast pyrolysis of milled wood lignin (MWL) isolated from ginkgo (soft wood), wheat straw (herbaceous biomass), and poplar (hardwood) were conducted at various temperatures (400/600/800 °C) and the liquid products were analyzed by GC–MS. Then all MWLs were fully characterized using GPC, TGA, FT-IR, 2D NMR, and elemental analyses. Ginkgo MWL showed higher selectivity toward guaiacols (92.38%) at low temperature (400 °C), especially a higher selectivity for five useful compounds (67.7%), namely creosol (10.24%), 2-methoxy-4-vinylphenol (17.83%), vanillin (15.65%), isoeugenol (14.84%), and apocynin (9.14%), as compared to MWLs from wheat straw or poplar. Overall, ginkgo lignin exhibits vast potential for volatilization at low temperature-selective pyrolysis, because it retains highly concentrated guaiacol-type structures which are easy to deconstruct and a few β-5′ phenylcoumarans that are hard to crack.