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生物质化学工程 ›› 2020, Vol. 54 ›› Issue (1): 23-30.doi: 10.3969/j.issn.1673-5854.2020.01.004

• 研究报告 • 上一篇    下一篇

基于Py-GC×GC-qMS的玉米芯热解产物在线检测

李文斌1,2,3,郑云武1,2,3,卢怡1,3,郑志锋1,3,4,*()   

  1. 1. 云南省生物质能源国际联合研究中心; 云南省生物质高效利用工程实验室; 云南省高校生物质化学炼制与合成重点实验室, 西南林业大学, 云南 昆明 650224
    2. 西南林业大学 材料科学与工程学院, 云南 昆明 650224
    3. 林业生物质资源高效利用技术国家地方联合工程研究中心, 西南林业大学, 云南 昆明 650224
    4. 厦门市现代农业生物质高值化技术重点实验室(厦门大学); 福建省生物质高值化技术工程研究中心(厦门大学); 厦门大学 能源学院, 福建 厦门 361102
  • 收稿日期:2018-12-14 出版日期:2020-01-30 发布日期:2020-02-11
  • 通讯作者: 郑志锋 E-mail:535290277@qq.com
  • 作者简介:李文斌(1995-),男,甘肃天水人,硕士生,主要从事生物质利用及催化重整生物质热解气制备化学品的基础研究工作
  • 基金资助:
    国家自然科学基金资助项目(31670599);云南省教育厅资助项目(2018Y115);云南省新能源重大科技专项(2015ZB001)

On-line Detection of Corncob Rapid Pyrolysis Products Based on Py-GC×GC-qMS

Wenbin LI1,2,3,Yunwu ZHENG1,2,3,Yi LU1,3,Zhifeng ZHENG1,3,4,*()   

  1. 1. Yunnan Provincial International Joint Research Center for Bioenergy; Yunnan Provincial Engineering Laboratory for Highly-Efficient Utilization of Biomass; Yunnan Provincial University Key Laboratory for Biomass Chemical Refinery & Synthesis, Southwest Forestry University, Kunming 650224, China
    2. School of Materials Science & Engineering, Southwest Forestry University, Kunming 650224, China
    3. National Local Joint Engineering Research Center for Efficient Utilization of Forestry Biomass Resources, Southwest Forestry University, Kunming 650224, China
    4. Xiamen Key Laboratory for High-valued Conversion Technology of Agricultural Biomass(Xiamen University); Fujian Provincial Engineering and Research Center of Clean and High-valued Technologies for Biomass; College of Energy, Xiamen University, Xiamen 361102, China
  • Received:2018-12-14 Online:2020-01-30 Published:2020-02-11
  • Contact: Zhifeng ZHENG E-mail:535290277@qq.com
  • Supported by:
    国家自然科学基金资助项目(31670599);云南省教育厅资助项目(2018Y115);云南省新能源重大科技专项(2015ZB001)

摘要:

利用热裂解-全二维气相色谱-质谱联用(Py-GC×GC-qMS)仪对玉米芯不同温度下热解产物进行在线分析。研究结果表明:玉米芯在550℃下热解18 s,GC×GC-qMS共检测到191种化合物,包括醇、酸、醛、酮、酯、呋喃类、碳氢化合物、酚类、含氮类和糖类等。主要化合物包括2,3-二氢-苯并呋喃、1,6-脱水-β-d-吡喃葡萄糖和糠醛,其GC含量分别为9.15%、8.80%和5.21%;而GC-qMS仅检测到58种化合物,且未检测到糖类化合物。玉米芯热解产物的种类随着温度的升高逐渐增加,在550℃时达到稳定值。温度对醛类、酮类和呋喃类化合物的影响并不明显,GC含量分别在450、550和500℃时达到最大,分别为4.80%、13.57%和21.01%;醇类、酸类和酯类化合物易在低温条件下形成;碳氢化合物易在高温条件下形成,600℃时GC含量为10.77%;酚类呈现出先增加后减少的趋势,450℃时GC含量最大为23.77%;温度的升高对含氮类和糖类GC含量的影响并不明显。

关键词: Py-GC×GC-qMS, 玉米芯, 温度, 热解产物, 在线检测

Abstract:

The pyrolysis products of corncob at different temperatures were analyzed on-line by using the pyrolysis-comprehensive two-dimensional gas chromatography-mass spectrometry(Py-GC×GC-qMS). The results showed that the 191 compounds were detected by GC×GC-qMS, including alcohols, acids, aldehydes, ketones, esters, furans, hydrocarbons, phenols, nitrogens and sugars when the corncob was pyrolyzed at 550℃ with 18 s. The main compounds included benzofuran, 2, 3-dihydro-, 1, 6-anhydro-beta-d-talopyranose and furfural, with GC contents of 9.15%, 8.8% and 5.21%, respectively. However, GC-qMS detected only 58 compounds, and no sugars were detected. The types of corncob pyrolysis products gradually increased with temperature increasing, reaching a stable value at 550℃. The influence of temperature on the contents of aldehydes, ketones and furans was not obvious, and the GC contents reached the maximum at 450, 550 and 500℃, which were 4.80%, 13.57% and 21.01%, respectively. Alcohols, acids and esters were easily be formed at low temperatures. Hydrocarbons were more easily be formed at high temperature, and the GC content was 10.77% at 600℃. The contents of phenols increased first and then decreased, and the maximum GC content was 23.77% at 450℃. The effect of temperature increase on the GC content of nitrogens and sugars was not obvious.

Key words: Py-GC×GC-qMS, corncob, temperature, pyrolysis products, on-line detection

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