Journal
FUEL PROCESSING TECHNOLOGY
Volume 206, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.fuproc.2020.106479
Keywords
Lignin; Depolymerization; Ultrasound-assisted; Phenolic monomer; Lignin bio-oil
Funding
- National Key Research and Development Program of China [2017YFB0307900]
- National Natural Science Foundation of China [31470604, 21908014]
- Liaoning Providence Science and Technology Project [20180550759]
- Opening Project of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control [KF201803-5]
- State Key Laboratory of Pulp and Paper Engineering [201803]
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The ultrasound-assisted depolymerization of lignin was successfully conducted over a synthesized PTA/MCM-41 catalyst under different reaction conditions. Firstly, the structure of the prepared PTA/MCM-41 catalyst was characterized by various techniques, and its acidity was determined using Fourier-transform infrared spectroscopy (FT-IR) of pyridine adsorption and temperature-programmed desorption of ammonia (NH3-TPD). Then, the effects of ultrasound frequency, reaction temperature, and reaction time on the distribution and yield of the products of the ultrasound-assisted depolymerization of lignin were studied. The optimum reaction conditions were obtained at an ultrasound frequency of 30%, a reaction temperature of 300 degrees C, and a reaction time of 6 h. Under the optimum reaction conditions, the conversion of lignin depolymerization was equal to 94.79%, and the yield of phenolic monomers (PM) and lignin bio-oil was 8.37% and 90.58% respectively.
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