玉米秸秆成型生物炭燃烧特性与动力学分析
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摘要
采用热重法对玉米秸秆成型颗粒及生物炭燃烧特性及动力学进行研究,并考察不同升温速率下(10、20、40℃/min)对320、500℃热解生物炭燃烧特性的影响,分析其燃烧特性及动力学参数。结果表明:玉米秸秆成型颗粒炭化后其燃烧热重分析(DTG)曲线呈现多峰状态,峰整体向高温区转移;玉米秸秆成型颗粒的着火温度和燃尽温度均小于生物炭,综合燃烧特性指数(SN)大于各温度热解炭化后样品。随着炭化温度的升高,成型生物炭着火温度和燃尽温度升高,SN减小;一级反应动力学能很好地描述各样品的燃烧动力学,相关系数(R~2)均高于0.9。
Thermogravimetric(TG)analysis is used to investigate combustion characteristics and kinetics of corn straw pellets and their biochars. Combustion behaviors of biochars produced at 320,500 ℃ are analyzed through different heating rates(10,20,40 ℃/min). As the results, burning DTG curves of corn straw pellets and their biochars show different peaks shapes,and the peak shifts to high temperature zone. The ignition and burnout temperature of corn straw pellets are less than biochars,and the integrated combustion characteristic index(SN)is greater than biochar pellets.With the increasing of carbonization temperature,the ignition temperature and burnout temperature increases,SN decreases. It is also found that the first order reaction kinetics model is suitable for expressing the combustion kinetics of corn straw pellets and their biochars. All correlation coefficients of the fitting curves are greater than 0.9.
Thermogravimetric(TG)analysis is used to investigate combustion characteristics and kinetics of corn straw pellets and their biochars. Combustion behaviors of biochars produced at 320,500 ℃ are analyzed through different heating rates(10,20,40 ℃/min). As the results, burning DTG curves of corn straw pellets and their biochars show different peaks shapes,and the peak shifts to high temperature zone. The ignition and burnout temperature of corn straw pellets are less than biochars,and the integrated combustion characteristic index(SN)is greater than biochar pellets.With the increasing of carbonization temperature,the ignition temperature and burnout temperature increases,SN decreases. It is also found that the first order reaction kinetics model is suitable for expressing the combustion kinetics of corn straw pellets and their biochars. All correlation coefficients of the fitting curves are greater than 0.9.
引文
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[2]孙堂磊,王毅,胡建军,等.玉米秸秆酶解与厌氧发酵产氢实验研究[J].太阳能学报,2015,36(9):2071-2076.[2]Sun Tanglei,Wang Yi,Hu Jianjun,et al.The experimental study on anaerobic fermentation biohydrogen production from enzymatic hydrolyzate of corn stover powder[J].Acta Energiae Solaris Sinica,2015,36(9):2071-2076.
[3]王健,赵玲,田萌萌,等.组合碱预处理对玉米秸秆厌氧消化的影响[J].太阳能学报,2014,35(12):2577-2581.[3]Wang Jian,Zhao Ling,Tian Mengmeng,et al.Influence of combined alkali pretreatment on anaerobic digestion of corn stalk[J].Acta Energiae Solaris Sinica,2014,35(12):2577-2581.
[4]Chen Ming,Zhao Jing,Xia Liming.Comparison of four different chemical pretreatments of corn stover for enhancing enzymatic digestibility[J].Biomass and Bioenergy,2009,33(10):1381-1385.
[5]朱金陵,何晓峰,王志伟,等.玉米秸秆颗粒热解制炭的试验研究[J].太阳能学报,2010,31(7):789-793.[5]Zhu Jinling,He Xiaofeng,Wang Zhiwei,et al.Experimental study on pyrolysising and producting charcoal with corn straw pellet[J].Acta Energiae Solaris Sinica,2010,31(7):789-793.
[6]Wang Xiubin,Song Dali,Liang Guoqing,et al.Maize biochar addition rate influences soil enzyme activity and microbial community composition in a fluvo-aquic soil[J].Applied Soil Ecology,2015,96:265-272.
[7]Nunes L J R,Matias J C O,Catal?o J P S.A review on torrefied biomass pellets as a sustainable alternative to coal in power generation[J].Renewable&Sustainable Energy Reviews,2014,40:153-160.
[8]Akowuah J O,Kemausuor F,Mitchual S J.Physicochemical characteristics and market potential of sawdust charcoal briquette[J].International Journal of Energy&Environmental Engineering,2012,3(1):1-6.
[9]严伟,陈智豪,盛奎川.适宜炭化温度及时间改善生物质成型炭品质[J].农业工程学报,2015,31(24):245-249.[9]Yan Wei,Chen Zhihao,Sheng Kuichuan.Carbonization temperature and time improving quality of charcoal briquettes[J].Transactions of the Chinese Society of Agricultural Engineering,2015,31(24):245-249.
[10]黄睿,胡建杭,王华,等.升温速率对成型生物质热解过程的影响[J].西北农林科技大学学报:自然科学版,2014,42(12):91-96.[10]Huang Rui,Hu Jianhang,Wang Hua,et al.Effects of heating rate on pyrolysis process of biomass briquettes[J].Journal of Northwest A&F University:Nutural Science Edition,2014,42(12):91-96.
[11]Undri A,Abou-Zaid M,Briens C,et al.Bio-oil from pyrolysis of wood pellets using a microwave multimode oven and different microwave absorbers[J].Fuel,2015,153:464-482.
[12]Chen Wei-Hsin,Lin Bo-Jhih.Characteristics of products from the pyrolysis of oil palm fiber and its pellets in nitrogen and carbon dioxide atmospheres[J].Energy,2016,94:569-578.
[13]范方宇,邢献军,施苏薇,等.水热生物炭燃烧特性与动力学分析[J].农业工程学报,2016,32(15):219-224.[13]Fan Fangyu,Xing Xianjun,Shi Suwei,et al.Combustion characteristic and kinetics analysis of hydrochars[J].Transactions of the Chinese Society of Agricultural Engineering,2016,32(15):219-224.
[14]Ru Bin,Wang Shurong,Dai Gongxin,et al.Effect of torrefaction on biomass physicochemical characteristics and the resulting pyrolysis behavior[J].Energy&Fuels,2015,29(9):5865-5874.
[15]Collard F X,Blin J.A review on pyrolysis of biomass constituents:Mechanisms and composition of the products obtained from the conversion of cellulose,hemicelluloses and lignin[J].Renewable&Sustainable Energy Reviews,2014,38(5):594-608.
[16]熊绍武,张守玉,吴巧美,等.生物质炭燃烧特性与动力学分析[J].燃料化学学报,2013,41(8):958-965.[16]Xiong Shaowu,Zhang Shouyu,Wu Qiaomei,et al.Investigation on combustion characteristics and kinetics of bio-char[J].Journal of Fuel Chemistry and Technology,2013,41(8):958-965.
[17]Fisher T,Hajaligol M,Waymack B,et al.Pyrolysis behavior and kinetics of biomass derived materials[J].Journal of Analytical&Applied Pyrolysis,2002,62(2):331-349.
[18]Zhang Shouyu,Lu Junfu,Zhang Jiansheng,et al.Effect of pyrolysis intensity on the reactivity of coal char[J].Energy&Fuels,2008,22(5):3213-3221.
[19]卢洪波,戴惠玉,马玉鑫.生物质三组分燃烧特性及动力学分析[J].农业工程学报,2012,28(17):186-191.[19]Lu Hongbo,Dai Huiyu,Ma Yuxin.Combustion characteristics and dynamic analysis of three biomass components[J].Transactions of the Chinese Society of Agricultural Engineering,2012,28(17):186-191.
[20]Ge Pu,Zhu Weilin,Zhou Huping,et al.Co-combustion characteristics of inferior coal and biomass blends in an oxygen-enriched atmosphere[J].Bioresources,2015,10(1):1452-1461.
[21]Yi Qiguo,Qi Fangjie,Cheng Gong,et al.Thermogravimetric analysis of co-combustion of biomass and biochar[J].Journal of Thermal Analysis&Calorimetry,2013,112(3):1475-1479.
[22]罗娟,侯书林,赵立欣,等.典型生物质颗粒燃料燃烧特性试验[J].农业工程学报,2010,26(5):220-226.[22]Luo Juan,Hou Shulin,Zhao Lixin,et al.Experimental study on combustion and emission characteristics of biomass pellets[J].Transactions of the Chinese Society of Agricultural Engineering,2010,26(5):276-282.
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[24]胡松,付鹏,向军,等.生物质热反应机理特性研究[J].太阳能学报,2009,30(4):509-514.[24]Hu Song,Fu Peng,Xiang Jun,et al.Study on the biomass thermo reactivity mechanism[J].Acta Energyiae Solaris Sinica,2009,30(4):509-514.