Journal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume 111, Issue -, Pages 47-54Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jaap.2014.12.013
Keywords
Lignin; Pyrolysis; Zeolite; Aromatics; Si/Al Ratio
Funding
- National Natural Science Foundation of China [501100001809, 51476034, S0165-2370(14)00363-5]
- National Basic Research Program of China (973 Program) [2012CB215306, 2011CB201505]
- FP7 Marie Curie IRSES [312261 iComFluid, S0165-2370(14)00363-5EU]
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Lignin, mostly existing in forms of solid residue from pulping process of biomass, has been intensively investigated as a potential feedstock for producing high-value chemicals. In this work, lignin precipitated from the acidified black liquor was pyrolyzed under different temperatures (550, 650, 800 and 900 degrees C) using the analytical pyrolysis technology coupled with GC/MS (Py-GC/MS). The experiments in absence and presence of five solid zeolite catalysts (HZSM-5(25), HZSM-5(50), HZSM-5(210), H-beta and H-USY) were carried out, in order to identify the optimal reaction temperature and the best catalyst for producing aromatic monomers (such as guaiacol, phenol, benzene, toluene, etc) from lignin. HZSM-5(25) played an important role in promoting the yield of aromatic monomers from lignin under 650 degrees C, while H-USY enhanced the formation of aromatic hydrocarbons such as benzene, toluene and xylene. (C) 2015 Elsevier B.V. All rights reserved.
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