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Energies 2013, 6(7), 3339-3352; doi:10.3390/en6073339
Article

Yield and Characteristics of Pyrolysis Products Obtained from Schizochytrium limacinum under Different Temperature Regimes

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1 College of Water Resources and Civil Engineering, China Agricultural University, No. 17 Qinghua East Road, Haidian District, Beijing 100083, China 2 Key Laboratory of Clean Production and Utilization of Renewable Energy, Ministry of Agriculture, P.R. China, No. 17 Qinghua East Road, Haidian District, Beijing 100083, China 3 Biomass Engineering Center/College of Engineering, China Agricultural University, No. 17 Qinghua East Road, Haidian District, Beijing 100083, China 4 College of Agriculture and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Haidian District, Beijing 100193, China 5 School of Health Sciences, University of Ballarat, Mt. Helen, VIC 3353, Australia 6 China Huadian Engineering Co., Ltd., No. 273 Xizhimennei Avenue, Xicheng District, Beijing 100035, China
* Author to whom correspondence should be addressed.
Received: 27 March 2013 / Revised: 14 June 2013 / Accepted: 20 June 2013 / Published: 5 July 2013
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Abstract

Pyrolysis-gas chromatographic mass spectrometry (Py-GC/MS) was used to determine the yield and chemical composition of the pyrolysis products of Schizochytrium limacinum. The pyrolysis was carried out by varying the temperature from 300 °C to 800 °C. It was found that the main decomposition temperature of Schizochytrium limacinum was 428.16 °C, at which up to 66.5% of the mass was lost. A further 18.7% mass loss then occurred in a relatively slow pace until 760.2 °C due to complete decomposition of the ash content of Schizochytrium limacinum. The pyrolysis of Schizochytrium limacinum at 700 °C produced the maximum yield (67.7%) of pyrolysis products compared to 61.2% at 400 °C. While pollutants released at 700 °C (12.3%) was much higher than that of 400 °C (2.1%). Higher temperature will lead to more pollutant (nitrogen compounds and PAHs) release, which is harmful to the environment. Considering the reasonably high yield and minimum release of pollutants, a lower pyrolysis temperature (400 °C) was found to be optimum for producing biofuel from Schizochytrium limacinum.
Keywords: Schizochytrium limacinum; microalgae; pyrolysis products; yield; real-time determination Schizochytrium limacinum; microalgae; pyrolysis products; yield; real-time determination
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Li, G.; Zhou, Y.; Ji, F.; Liu, Y.; Adhikari, B.; Tian, L.; Ma, Z.; Dong, R. Yield and Characteristics of Pyrolysis Products Obtained from Schizochytrium limacinum under Different Temperature Regimes. Energies 2013, 6, 3339-3352.

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