期刊
BIORESOURCE TECHNOLOGY
卷 278, 期 -, 页码 464-467出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.01.078
关键词
Kraft lignin; Formate; Analytical pyrolysis; Monophenols; Polyphenols
资金
- National Natural Science Foundation of China [31800497]
- China Postdoctoral Science Foundation [2018M643561]
- State Key Laboratory of Pulp and Paper Engineering [201820]
- Natural Science Basic Research Plan in Shaanxi Province of China [2018JQ3028]
- Open Project Fund of National Demonstration Center for Experimental Light Chemistry Engineering Education (Shaanxi University of Science Technology) [2018QGSJ02-05]
The effect of sodium formate (SF), calcium formate (CF) and nickel formate (NF) as additives on analytical pyrolysis performance of kraft lignin was conducted. The results showed that these formates promoted the releasing of volatiles, leading to the rapid degradation of kraft lignin. High relative content of monophenols (53.77%), especially of guaiacol (23.65%), were achieved from the pyrolysis of pure lignin. The relative content of guaiacol was dramatically decreased after the adding of formates in kraft lignin. The relative content of polyphenols such as 3-methylcatechol and 4-methylcatechol reached to 16.97%, 16.23% and 21.95% with the formates of SF, CF and NF, respectively. The NF showed the highest selectivity of polyphenols and hydrocarbons. The increase of polyphenols and hydrocarbons from NF was the synergetic effect of the hydrogen radical reaction from the formic functional groups under the catalysis of Ni and/or NiO produced from the NF pyrolysis process.
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