生物质燃气中固体颗粒物的临氧燃烧机理
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摘要
在陶瓷过滤器中,研究模拟生物质空气气化燃气(SPG)通过高温固体颗粒物层时颗粒物临氧燃烧反应及其机理。结果表明:在颗粒层温度为400℃,燃气含氧量为2%的条件下,生物质气化固体颗粒物(PBG)发生明显临氧燃烧反应,可促进过滤压力的迅速降低,但燃气热值降幅不超过1%。FTIR烃—CH_2—官能团的脱出以及含氧官能团的生成,结合XRD烧反应。
The partial oxidation mechanism of particulate matter was studied when the simulated biomass producer gas(SPG) passes through the high temperature solid particle layer in ceramic filter. The results show that when the temperature of particle layer is 400 ℃ and the oxygen content of SPG gas is 2%,the solid particulate matter produced from biomass gasification(PBG)undergoes significant partial oxidation reaction,and promotes the rapid reduction of filtration pressure,but the calorific value of gas does not fall by more than 1%. The FTIR analysis shows that the reaction mechanism is the release of cycloalkanes and aliphatic hydrocarbons functional groups(—CH_2—)and the formation of oxygen-containing functional groups,combining with XRD analysis,the results show that PBG particles containing tarlike substances are more prone to oxygen combustion reaction.
The partial oxidation mechanism of particulate matter was studied when the simulated biomass producer gas(SPG) passes through the high temperature solid particle layer in ceramic filter. The results show that when the temperature of particle layer is 400 ℃ and the oxygen content of SPG gas is 2%,the solid particulate matter produced from biomass gasification(PBG)undergoes significant partial oxidation reaction,and promotes the rapid reduction of filtration pressure,but the calorific value of gas does not fall by more than 1%. The FTIR analysis shows that the reaction mechanism is the release of cycloalkanes and aliphatic hydrocarbons functional groups(—CH_2—)and the formation of oxygen-containing functional groups,combining with XRD analysis,the results show that PBG particles containing tarlike substances are more prone to oxygen combustion reaction.
引文
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[6]Chen Yishun,Hsiau S S,Lai Sinchang,et al.Filtration of dust particulates with a moving granular bed filter[J].Journal of Hazardous Materials,2009,171(1-3):987-994.
[7]Sharma S D,Dolan M,Ilyushechkin A Y,et al.Recent developments in dry hot syngas cleaning processes[J].Fuel,2010,89(4):817-826.
[8]郎林,谢建军,杨文申,等.改性陶瓷管高温净化生物质粗燃气的研究[J].工程热物理学报,2014,35(8):1665-1668.[8]Lang Lin,Xie Jianjun,Yang Wenshen,et al.Hot gas filtration performance of modified ceramic candles for biomass gasification[J].Journal of Engineering Thermophysics,2014,35(8):1665-1668.
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[10]阴秀丽,吴晋沪,定明月,等.千吨级生物质气化合成液体燃料关键技术与示范[R].455860816-2011BAD22B06/01,2011.[10]Yin Xiuli,Wu Jinhu,Ding Mingyue,et al.The key technology and demonstration of kiloton class production of liquid fuels via biomass gasification[R].National Science and Technology Report,China,455860816-2011BAD22B06/01,2014.
[11]郎林,阴秀丽,吴创之,等.一种生物质粗燃气高温除尘除焦一体化净化工艺[P].中国:201310590071.7,2013-11-20.[11]Lang Lin,Yin Xiuli,Wu Chuangzhi,et al.A new process for the integrated tar reforming and particulate abatement of the biomass producer gas at high temperatures[P].China:201310590071.7,2013-11-20.
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[13]Hidehiro K,Youichi S,Masayuki H.Thermal stress fracture of rigid ceramic filter due to char combustion in collected dust layer on filter surface[J].Powder Technology,2001,115(2):139-145.
[14]Miguel G S,Domínguez M P,Hernández M,et al.Characterization and potential applications of solid particles produced at a biomass gasification plant[J].Biomass Bioenerg,2012,47(4):134-144.
[15]Catherine E B,Klaus S,Justinus A S,et al.Characterization of biocharfrom fast pyrolysis and gasification systems[J].Environmental Progress&Sustainable Energy,2009,28(3):386-396.
[16]胡德生.焦炭微晶结构特性研究[J].钢铁,2006,41(11):11-12,41.[16]Hu Desheng.Crystallite structure characteristics of coke[J].Iron and Steel,2006,41(11):11-12,41.