玉米秸秆棒状燃料热解过程和产物特征研究

doi:10.3969/j.issn.1673-5854.2016.03.003

生物质化学工程 ›› 2016, Vol. 50 ›› Issue (3): 13-20.doi: 10.3969/j.issn.1673-5854.2016.03.003

玉米秸秆棒状燃料热解过程和产物特征研究

杨华^1,2, 黄丽², 刘石彩^1,2, 许伟², 孙云娟^1,2, 侯敏²

1. 中国林业科学研究院林业新技术研究所, 北京 100091;
2. 中国林业科学研究院林产化学工业研究所;生物质化学利用国家工程实验室;国家林业局林产化学工程重点开放性实验室;江苏省生物质能源与材料重点实验室, 江苏南京 210042

收稿日期:2015-11-16 出版日期:2016-05-31 发布日期:2016-06-03
通讯作者: 刘石彩(1965-),研究员,硕士生导师,研究领域:生物质能源及活性炭;E-mail:lshicai@sina.com。 E-mail:lshicai@sina.com
作者简介:杨华(1989-),女,河南新乡人,硕士生,主要从事生物质能源方面的研究
基金资助:
中国林科院林业新技术所基本科研业务费专项资金(CAFINT2014K04);"十二五"国家科技支撑计划资助项目(2012BAD30B03)

Pyrolysis Process of Corn Stalk Briquettes and Characteristics of Products

YANG Hua^1,2, HUANG Li², LIU Shi-cai^1,2, XU Wei², SUN Yun-juan^1,2, HOU Min²

1. Research Institute of Forestry New Technology, CAF, Beijing 100091, China;
2. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SFA;Key Lab. of Biomass Energy and Materials, Jiangsu Province, Nanjing 210042, China

Received:2015-11-16 Online:2016-05-31 Published:2016-06-03

摘要/Abstract

摘要： 以玉米秸秆棒状燃料为原料,在固定床反应器上探究热解温度对玉米秸秆棒状燃料热解过程和热解产品性质的影响。研究发现,随着热解温度的升高,热解气体产量增加,固体炭产量逐渐减少,生物油产量先增后减在450℃时达到最大值35.61%。对固体炭进行工业分析,发现其灰分含量较高;FT-IR分析表明:玉米秸秆棒状燃料的热解反应主要发生在650℃之前;SEM图显示断截面表现为蜂窝状的孔结构。生物油的GC-MS分析表明:在250~750℃下生物油的组成主要是呋喃、酮、醛和酚类等含氧化合物,其中酚类和呋喃类化合物是含量最多的物质;而在850~950℃下以多环芳烃类化合物为主。热解气的主要组成是CO₂、CO、CH₄和H₂,同时有少量的C₂H_n化合物,在250~450℃范围内,气体的主要组成是CO和CO₂,随着温度升高,CO、H₂、CH₄和C₂H_n逐渐增加,热解气的热值逐渐增加,在650℃下气体产品的热值已达到13.05 MJ/m³,当温度大于650℃后,热值增加速率变慢。

关键词: 玉米秸秆, 棒状燃料, 热解, 产物特性, 生物油

Abstract: The pyrolysis of corn stalk briquette in a fixed bed was investigated.The influences of pyrolysis temperature on the pyrolysis process and the properties of products (solid charcoal,bio-oil and gaseous product) were studied,too.The research found that with the increase of the pyrolysis temperature,the yield of solid charcoal decreased,and the production of gaseous product increased.The bio-oil yield firstly increased and then decreased with the maximum of 35.61% at 450℃.The proximate,FT-IR and SEM analyses of solid charcoal showed that the charcoal had high ash content,the pyrolysis reaction of corn stalk briquette occuried mainly before 650℃ and the pore structure was honeycomb on the broken section.The GC-MS analyses of bio-oil showed that at low temperature (250-750℃),the organic compounds identified from pyrolysis bio-oil mainly included many oxygenated compounds such as aldehydes,ketones,furans and phenols;the phenolic compounds and furans were most abundant compounds.Nevertheless, the major compounds in the pyrolysis bio-oil obtained at higher temperatures (850-950℃) were polycyclic aromatic hydrocarbons (PAHS).The main compositions of gaseous product were CO₂,CO,H₂,CH₄and a spot of C₂H_n.In the temperature of 250-450℃,the high proportion in gaseous were CO and CO₂.With the increase of temperature,the productions of CO, H₂, CH₄ and C₂H_n increased,then the calorific value of gaseous product increased.At 650℃,the calorific value of the pyrolysis gas had reached 13.05 MJ/m³ and the rate of increasing slowed down when temperature exceed 650℃.

Key words: corn stalk, briquette, pyrolysis, product properties, pyrolysis bio-oil

中图分类号:

TQ35
TK16

杨华, 黄丽, 刘石彩, 许伟, 孙云娟, 侯敏. 玉米秸秆棒状燃料热解过程和产物特征研究[J]. 生物质化学工程, 2016, 50(3): 13-20.

YANG Hua, HUANG Li, LIU Shi-cai, XU Wei, SUN Yun-juan, HOU Min. Pyrolysis Process of Corn Stalk Briquettes and Characteristics of Products[J]. bce, 2016, 50(3): 13-20.

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玉米秸秆棒状燃料热解过程和产物特征研究

Pyrolysis Process of Corn Stalk Briquettes and Characteristics of Products

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