Py-GC/MS技术用于Chaetoceros sp. 硅藻的催化热解研究
收稿日期: 2015-09-02
修回日期: 2015-10-27
网络出版日期: 2015-12-30
基金资助
中国科学院仪器设备功能开发技术创新项目（yg2012051）
Study on Catalytic Pyrolysis of Diatom Chaetoceros sp. by Py-GC/MS Technology
Received date: 2015-09-02
Revised date: 2015-10-27
Online published: 2015-12-30
采用热裂解−气质联用（Py-GC/MS）技术研究Chaetoceros sp. 硅藻粉末的催化热解特性。以HZSM-5为催化剂，考察了不同Si/Al比的HZSM-5催化剂对硅藻热解产物的影响，并考察了催化剂的使用量、热解升温速率、热解反应时间对产物的影响。结果表明：未加催化剂时，硅藻热解产物以脂肪酸为主，含量为50.05%，苯系物含量仅为0.87%；加入HZSM-5催化剂后，硅藻热解产物中脂肪酸含量减少，芳香类化合物显著增加。热解实验结果发现，Si/Al比为38、硅藻和HZSM-5比例为1∶9、热解速率10 000℃/s、热解时间为10 s时，能得到较理想的热解产品，其中苯系物产率可达57.76%，脂肪酸含量为2.63%。这说明HZSM-5（38）具有较好的脱氧和芳构化功能，有利于硅藻催化热解生成高品质的生物油产品。
张晓红 , 苏秋成 , 林福华 , 陈晓丽 , 付 娟 . Py-GC/MS技术用于Chaetoceros sp. 硅藻的催化热解研究[J]. 新能源进展, 2015 , 3(6) : 469 -476 . DOI: 10.3969/j.issn.2095-560X.2015.06.010
The catalytic pyrolysis characteristics of diatom Chaetoceros sp. powders were investigated by pyrolysis–gas chromatography/mass spectrometry (Py-GC/MS) technology. Using HZSM-5 as catalyst, the effect of Si/Al ratio in HZSM-5, catalyst consumption, pyrolysis heating rate and pyrolysis reaction time on pyrolysis products of diatom Chaetoceros sp. were studied. The results show that the pyrolysis products of diatom Chaetoceros sp. without catalysts are mainly fatty acids with the contents of 50.05%, and the contents of benzenes are only 0.87%. When catalysts were added, the contents of fatty acids are decreased and aromatic compounds are significantly increased. Pyrolysis results suggest that, desired products of 57.76% benzenes and 2.63% fatty acids could be obtained on the conditions of Si/Al ratio of 38, diatom:HZSM-5 at a 1:9 mass ratio, heating rate 10 000oC/s and reaction time of 10 s, which indicates that the reaction of deoxygenation and aromatization significantly happen with HZSM-5(38)’s addition. Thus, HZSM-5(38) is favorable for Diatom Chaetoceros sp. to produce high quality bio-oil products by catalytic pyrolysis.
Key words： catalytic pyrolysis; Py-GC/MS; diatom; HZSM-5; bio-oil
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