期刊
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
卷 124, 期 -, 页码 696-703出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jaap.2016.12.002
关键词
Pongamia pinnata; Fast pyrolysis; Zeolite; Biomass; Bio-oil; Py-GCMS
资金
- Grant for International Research Integration: Chula Research Scholar, Ratchadaphiseksomphot Endowment Fund
- National Metal and Materials Technology Center, Thailand [MT-B-58-CER-07-308-I]
- JST/JICA, Science and Technology Research Partnership for Sustainable Development (SATREPS), Japan
De-oiled Millettia (Pongamia) pinnata seed waste (PPW) is produced in large amounts after the oil extraction process, but still contains 20% (w/w) oil residues. These raw wastes are of no value and consist of toxic compounds, such as karanjin and di-ketone pongamol, with an overall composition of 45-51% carbon and 5-7% hydrogen and 91% combustible compounds, including fixed carbon and volatile matter. The conversion of PPW to biofuel via pyrolysis is one potential use. Fast pyrolysis of PPW was performed at 400, 500 and 600 degrees C in a micro-batch pyrolyzer interfaced with gas chromatography-mass spectrometry (Py-GC/MS). However, the pyrolytic products contained a high level of oxygenated- (34.1-66.5%) and nitrogenated-compounds, giving poor fuel properties, such as a high acidity and viscosity. Oxygenated compounds were mainly carboxylic acids, ketones, alcohols and esters. The introduction of the zeolite (USY) catalyst into the pyrolysis of PPW improve the pyrolytic liquid properties. The oxygenated compounds underwent undergoing decarbonylation, decarboxylation and dehydration reactions and further conversion to aliphatic and aromatic hydrocarbons. Pyrolysis at 500 degrees C of small sized PPW particles (125-425 mu m) at a PPW: USY ratio of 1:5 gave the highest hydrocarbon yield (99.0%). The selectivity for monocyclic aromatic hydrocarbons at 500 degrees C was increased from 4.7-17.4% to 52.5-56.5% when the biomass: catalyst ratio was increased from 1:1 to 1:5. Moreover, the USY catalyst promoted carbon chain scission producing shorter hydrocarbons (C5-12), which was enhanced by the decarboxylation and dealkylation of the alkylated oxygenated compounds. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据