基于Py-GC/MS的玉米秸秆快速热解实验研究

doi:10.3969/j.issn.1673-5854.2021.04.005

Abstract

Abstract:

Fast pyrolysis experiments were studied by using pyrolysis-gas chromatography/mass spectrometry(Py-GC/MS) under different pyrolysis conditions with corn stalk as material, and the pyrolysis gases were online analyzed. The effects of pyrolysis time, pyrolytic temperature and ZSM-5 catalyst on the pyrolysis characteristics and distribution of pyrolysis products of corn stalk were focused. The experimental results showed that the higher pyrolysis temperature was, the more fully pyrolysis reaction would be, and the pyrolysis products of 550℃ had the highest quality, the content of aromatic compound was the maximum(28.3%). Pyrolysis reaction constantly intensified with the increase of pyrolysis time, and the pyrolysis products of 10 s had the highest quality, the content of ketones was the minimum(11.8%) and the content of aromatic compound was the maximum(28.3%); ZSM-5 catalyst could significantly promote the polycondensation reaction to generate benzene ring in the secondary reactions, and could also promote a series of aromatization reactions, remove oxygen out of oxygen species of aromatic compounds, generate a large number of aromatic hydrocarbons. So ZSM-5 catalyst had good performance of catalytic deoxidization, and it could effectively improve the quality of the pyrolysis products.

Key words: corn stalk, Py-GC/MS, pyrolysis time, pyrolysis temperature, ZSM-5 catalyst

CLC Number:

TQ35
TK6

Zhichao LIU, Yanyan WANG, Fangdong ZHENG, Di WAN. Fast Pyrolysis Experiments of Corn Stalk by Py-GC/MS[J]. Biomass Chemical Engineering, 2021, 55(4): 29-33.

Figures/Tables 7

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References 17

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产物 product	不同热解温度下相对峰面积relative peak area at different pyrolysis temperature/%
产物 product	450 ℃	500 ℃	550 ℃	600 ℃	650 ℃	700 ℃
二氧化碳carbon dioxide	68.3	37.0	24.2	21.2	25.5	24.0
烃类hydrocarbons	15.5	11.9	7.7	8.0	8.0	6.8
酸类acids	0.7	21.0	13.6	13.1	11.7	10.1
醛类aldehydes	0.0	0.0	1.3	1.7	2.2	1.7
酮类ketones	0.0	7.1	11.8	14.3	14.6	14.7
醇类alcohols	0.0	1.8	2.1	7.6	7.1	5.3
呋喃类furans	0.0	0.0	4.1	2.5	2.1	2.5
糖类carbohydrate	0.0	1.0	6.4	5.7	6.1	8.8
含氮类nitrogen	0.0	0.0	0.5	0.6	0.4	1.1
芳香族类aromatics	15.4	20.1	28.3	25.2	22.2	25.0

产物 product	不同热解时间下相对峰面积relative peak area under different pyrolysis time/%
产物 product	5 s	10 s	20 s	30 s
二氧化碳carbon dioxide	22.3	24.2	25.1	26.2
烃类hydrocarbons	8.7	7.7	7.6	9.3
酸类acids	11.6	13.6	11.9	11.1
醛类aldehydes	5.9	1.3	7.0	4.2
酮类ketones	21.1	11.8	18.0	18.2
醇类alcohols	4.7	2.1	3.9	3.9
呋喃类furans	1.1	4.1	2.3	1.6
糖类carbohydrate	1.7	6.4	6.4	8.2
含氮类nitrogen	0.5	0.5	0.3	0.0
芳香族类aromatics	22.3	28.3	17.5	17.3

产物 product	相对峰面积/% relative peak area	产物 product	相对峰面积/% relative peak area
苯benzene	4.9	愈创木酚guaiacol	7.0
甲苯toluene	14.1	3-甲基, 1H-茚3-methyl, 1H-indene	0.5
乙基苯ethylbenzene	0.7	萘naphthalene	2.5
间二甲苯m-xylene	13.9	2, 3-二氢苯并呋喃2, 3-dihydrobenzofuran	4.4
对二甲苯p-xylene	1.4	4-乙基-2-甲氧基苯酚4-ethyl-2-methoxyphenol	0.4
邻乙基甲苯o-ethyl toluene	0.8	1-甲基萘1-methylnaphthalene	3.0
1, 2, 3-三甲苯1, 2, 3-trimethylbenzene	0.6	1, 7-二甲基萘1, 7-dimethylnaphthalene	0.7
茚满indan	1.7

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Fast Pyrolysis Experiments of Corn Stalk by Py-GC/MS

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