褐煤和油菜秸秆低温共热解产物及协同效应分析（英文）
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摘要
印尼褐煤(IL)与不同质量分数的油菜秸秆(RS)在自制的低温煤炭化炉中共热解,得到热解半焦和焦油。结果表明:当RS的质量分数为30%时,共热解油的产率达到最大值14.03%,产率比纯褐煤热解油产率高57.59%。热解半焦的SEM结果表明,共热解半焦比褐煤半焦孔隙结构更加丰富;热解油的FTIR和GC-MS结果表明,共热解焦油更轻质化,酸度更低;样品的热重分析表明,油菜秸秆与褐煤的DTG峰值部分重叠,共热解过程符合二级动力学方程,加入RS后,共热解反应的活化能E降低,反应性增强,TG曲线向低温区域移动。RS和IL的共热解存在协同效应,共热解实现了褐煤和油菜秸秆的清洁高效利用。
Indonesia lignite(IL)was co-pyrolyzed with different mass fractions of rape straw(RS)in a lowtemperature coal carbonization furnace.The results indicate that the yield of pyrolysis oil reaches a maximum of 14.03% and the productivity will be 57.59% higher than that of pure lignite pyrolysis as the mass fraction of RS is 30%.The morphology and structure of semi-coke surfaces were described quantitatively by SEM,and pyrolysis oils were detected by FTIR and GC-MS.Thermogravimetric analysis of samples shows that the pyrolysis temperature range overlaps.The DTG peak of rape straw partially overlaps with lignite's,and the pyrolysis process conformed to the second-order kinetic equation during co-pyrolysis.The activation energy Edecreases and the reactivity increases.Consequently,the TG curve moves to the low temperature region.By using the proposed method,the clean and efficient utilization of lignite and rape straw is realized,and the resources are turned into precious.
Indonesia lignite(IL)was co-pyrolyzed with different mass fractions of rape straw(RS)in a lowtemperature coal carbonization furnace.The results indicate that the yield of pyrolysis oil reaches a maximum of 14.03% and the productivity will be 57.59% higher than that of pure lignite pyrolysis as the mass fraction of RS is 30%.The morphology and structure of semi-coke surfaces were described quantitatively by SEM,and pyrolysis oils were detected by FTIR and GC-MS.Thermogravimetric analysis of samples shows that the pyrolysis temperature range overlaps.The DTG peak of rape straw partially overlaps with lignite's,and the pyrolysis process conformed to the second-order kinetic equation during co-pyrolysis.The activation energy Edecreases and the reactivity increases.Consequently,the TG curve moves to the low temperature region.By using the proposed method,the clean and efficient utilization of lignite and rape straw is realized,and the resources are turned into precious.
引文
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[2]SHANG Yizi,HEI Pengfei,LU Shibao,et al.China’s Energy-water Nexus:Assessing Water Conservation Synergies of the Total Coal Consumption Cap Strategy Until 2050[J].Applied Energy,2018,210:643-660.
[3]SONG Huijuan,LIU Guangrui,WU Jinhu.Pyrolysis Characteristics and Kinetics of Low Rank Coals by Distributed Activation Energy Model[J].Energy Conversion and Management,2016,126:1037-1046.
[4]WANG Guangwei,ZHANG Jianliang,SHAO Jiugang,et al.Thermal Behavior and Kinetic Analysis of Co-combustion of Waste Biomass/Low Rank Coal Blends[J].Energy Conversion and Management,2016,124:414-426.
[5]ROY B,BHATTACHARYA S.Ash Characteristics During Oxy-fuel Fluidized Bed Combustion of a Victorian Brown Coal[J].Powder Technology,2016,288:1-5.
[6]LI Xian,HU Haoquan,JIN Lijun,et al.Approach for Promoting Liquid Yield in Direct Liquefaction of Shenhua Coal[J].Fuel Processing Technology,2008,89:1090-1095.
[7]JIN Hui,FAN Chao,GUO Liejin,et al.Experimental Study on Hydrogen Production by Lignite Gasification in Supercritical Water Fluidized Bed Reactor Using External Recycle of Liquid Residual[J].Energy Conversion and Management,2017,145:214-219.
[8]SONG Guoliang,SONG Weijian,QI Xiaobin,et al.Transformation Characteristics of Sodium of Zhundong Coal Combustion/Gasification in Circulating Fluidized Bed[J].Energy and Fuels,2016,30:3473-3478.
[9]ZHANG Huirong,BAI Jin,KONG Lingxue,et al.Behavior of Minerals in Typical Shanxi Coking Coal During Pyrolysis[J].Energy and Fuels,2015,29:6912-6919.
[10]DUAN Wenjun,YU Qingbo,XIE Huating,et al.Pyrolysis of Coal by Solid Heat Carrier-experimental Study and Kinetic Modeling[J].Energy,2017,135:317-326.
[11]KUSY J,ANDEL L,SAFAROVA M,et al.Hydrogenation Process of the Tar Obtained from the Pyrolysis of Brown Coal[J].Fuel,2012,101:38-44.
[12]KANG Aibin,CHENG Yankun,HUO Peng,et al.Study on Removal Nitrate with Agricultural Waste as Carbon Source[J].Anhui Agricultural Sciences,2012,40(6):3510-3512.
[13]YAN Qunfang,ZHANG Shiqi,CAI Xiuping,et al.Crop By-products are Used as Solid Carbon Sources for Wastewater Treatment[J].Jiangsu Agricultural Sciences,2016,44(9):462-464.
[14]LIU Muxin,YANG Jianli,LIU Zhenyu,et al.Cleavage of Covalent Bonds in the Pyrolysis of Lignin,Cellulose,and Hemicellulose[J].Energy and Fuels,2015,29:5773-5780.
[15]YADAV V,BARUAH B P,KHARE P.Comparative Study of Thermal Properties of Bio-coal from Aromatic Spent with Low Rank Sub-bituminous Coals[J].Bioresource Technology,2013,137:376-385.
[16]GUO Feiqiang,LI Xiaolei,WANG Yan,et al.Characterization of Zhundong Lignite and Biomass Co-pyrolysis in a Thermogravimetric Analyzer and a Fixed Bed Reactor[J].Energy,2017,141:2154-2163.
[17]HE Yuyuan,CHANG Chun,LI Pan,et al.Thermal Decomposition and Kinetics of Coal and Fermented Cornstalk Using Thermogravimetric Analysis[J].Bioresource Technology,2018,259:294-303.
[18]KRERKKAIWAN S,FUSHIMI C,TSUTSUMI A,et al.Synergetic Effect During Co-pyrolysis/Gasification of Biomass and Sub-bituminous Coal[J].Fuel Processing Technology,2013,115:11-18.
[19]YUAN Shuai,DAI Zhenghua,ZHOU Zhijie,et al.Rapid Co-pyrolysis of Rice Straw and a Bituminous Coal in a High-frequency Furnace and Gasification of the Residual Char[J].Bioresource Technology,2012,109:188-197.
[20]ZHANG Junjie,QUAN Cui,QIU Yujie,et al.Effect of Char on Co-pyrolysis of Biomass and Coal in a Free Fall Reactor[J].Fuel Processing Technology,2015,135:73-79.
[21]HU Erfeng,ZENG Xi,MA Dachao,et al.Effect of the Moisture Content in Coal on the Pyrolysis Behavior in an Indirectly Heated Fixed-bed Reactor with Internals[J].Energy and Fuels,2017,31:1347-1354.
[22]YI Shuang,HE Xuanming,LIN Hongtao,et al.Synergistic Effect in Low Temperature Co-pyrolysis of Sugarcane Bagasse and Lignite[J].Korean Journal of Chemical Engineering,2016,33(10):2923-2929.
[23]LIU Quanrun,HU Haoquan,ZHOU Qiang,et al.Effect of Inorganic Matter on Reactivity and Kinetics of Coal Pyrolysis[J].Fuel,2004,83(6):713-718.
[24]ZHAO Hongyu,SONG Qiang,LIU Shucheng,et al.Study on Catalytic Co-pyrolysis of Physical Mixture/Staged Pyrolysis Characteristics of Lignite and Straw over an Catalytic Beds of Char and Its Mechanism[J].Energy Conversion and Management,2018,161:13-26.
[25]VYAS A,CHELLAPPA T,GOLDFARB J L.Porosity Development and Reactivity Changes of Coal-biomass Blends During Co-pyrolysis at Various Temperatures[J].Journal of Analytical and Applied Pyrolysis,2017,124:79-88.
[26]OUDGHIRI F,ALLALI N,QUIROGA J M,et al.TG-FTIR Analysis on Pyrolysis and Combustion of Marine Sediment[J].Infrared Physics and Technology,2016,78:268-274.
[27]HUANG Xin,CAO Jingpei,ZHAO Xiaoyan,et al.Pyrolysis Kinetics of Soybean Straw Using Thermogravimetric Analysis[J].Fuel,2016,169:93-98.
[28]EBRAHIMI-KAHRIZSANGI R,ABBASI M H.Evaluation of Reliability of Coats-redfern Method for Kinetic Analysis of Non-isothermal TGA[J].Transactions of Nonferrous Metals Society of China,2008,18:217-221.