不同形态梗丝的热解燃烧特性及动力学参数差异分析
Study on the pyrolysis/combustion characteristics and reaction kinetics parameters of cut stems with different morphology
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摘要: 采用热重分析技术研究了不同形态梗丝的热解燃烧特性,并基于Coats-Redfern法对比分析了梗丝在热解或燃烧过程中各失重阶段的动力学参数差异。结果表明:与片状梗丝相比,丝状梗丝色泽较深,微观表面呈现出粗糙的沟壑状不规则蜂窝结构,与叶丝的掺配适用性更优;不同形态梗丝在热解条件下的失重过程可分为4个主要阶段,其中丝状梗丝在挥发分析出阶段的失重率和失重速率均高于片状梗丝,其在热湿加工过程中具有较好的香味成分持留能力,丝状梗丝的综合热解指数CPI为1.24×10-4/(%· min-1·℃-2),高于片状梗丝,表现出较好的热解特性;不同形态梗丝燃烧失重过程也分为4个主要阶段,丝状梗丝具有较高的综合燃烧特性指数和较低的燃烧残余质量;不同形态梗丝的热分解主要失重阶段均符合F1.5级化学反应控制模型,梗丝形态对样品热失重阶段的动力学参数影响显著。Abstract: Thermogravimetric analysis was used to study the pyrolysis and combustion characteristics of stems with different morphology. And the differences of kinetic parameters in each weight loss stage of stem during the pyrolysis or combustion were compared and analyzed based on the Coats-Redfern method. The results showed that the color of the filamentous stem was darker when compared with the flaky stem. The micro-surface of filamentous stem presented a rough gully shaped irregular honeycomb structure and exhibited a good blending applicability with cut tobacco. The weight loss process of stems with different morphology under pyrolysis conditions could be divided into four main stages. Among these stages, the weight loss and corresponding weight loss rate of filamentous stem in the volatile loss stage were higher than those of flaky stem, indicating that it possessed a good volatile flavor component retention capacity. The comprehensive pyrolysis index of filamentous stem was 1.24×10-4 /(%·min-1·℃-2), which was higher than that of flaky stem. And this result showed a better pyrolysis characteristics of filamentous stem. The weight loss of different stems during the combustion process could also be mainly divided into four stages. Filamentous stem exhibited a higher comprehensive combustion characteristic index and lower combustion residual mass. The main weight loss stages during the thermal decomposition of different stems were mainly controlled by a 1.5-order chemical reaction model. Furthermore, the morphology had a significant effect on the kinetic parameters of the thermal degradation stages of the stem.
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Key words:
- stem morphology /
- combustion /
- pyrolysis /
- weight loss /
- kinetic
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[1]
刘民昌,刘洋,文武,等.成丝工艺对梗丝物理质量的影响[J].烟草科技,2019,52(10):79-84.
-
[2]
周利军,郑力文,李洪涛,等.压梗和切梗工序对片状梗丝成丝特性的影响[J].中国烟草学报,2020,26(5):47-53.
-
[3]
周雅宁.烟梗加工处理技术与设备研究进展[J].中国烟草学报,2019,25(2):121-129.
-
[4]
丁美宙,刘欢,刘强,等.梗丝形态对细支卷烟加工及综合质量的影响[J].食品与机械,2017,33(9):197-202.
-
[5]
廖晓祥,赵云川,邹泉,等.梗丝形态对细支卷烟品质稳定性的影响[J].烟草科技,2016,49(10):74-80.
-
[6]
夏鸣,李金广,乔国宝,等.烤烟的燃烧特性及动力学分析[J].烟草科技,2012(11):38-41,50.
-
[7]
张果,岳先领,叶建斌,等.不同涂布率再造烟叶的热解特性及动力学分析[J].食品与机械,2021,37(5):39-46.
-
[8]
宋丽丽,魏涛,杨旭,等.烟梗结构特征及其热解特性研究[J].轻工学报,2020,35(6):27-34.
-
[9]
郭高飞,刘朝贤,李斌,等.烟粉和烟丝的热解燃烧特性及反应动力学分析[J].烟草科技,2019,52(6):90-98.
-
[10]
范红梅,喻赛波,谭海风,等.不同梗丝微观结构和燃烧特性差异及其对卷烟的影响[J].烟草科技,2018,51(8):53-60.
-
[11]
CHEN X F,MA X Q,PENG X W,et al.Conversion of sweet potato waste to solid fuel via hydrothermal carbonization[J].Bioresource Techno-logy,2018,249:900-907.
-
[12]
FAN Y Y,LI L W,TIPPAYAWONG N,et al.Quantitative structure-reactivity relationships for pyrolysis and gasification of torrefied xylan[J].Energy,2019,188:116119.
-
[13]
LIANG M,ZHANG K,LEI P,et al.Fuel properties and combustion kinetics of hydrochar derived from co-hydrothermal carbonization of tobacco residues and graphene oxide[J].Biomass Conversion and Biorefinery,2020,10(1):189-201.
-
[14]
WU W X,MEI Y F,ZHANG L,et al.Kinetics and reaction chemistry of pyrolysis and combustion of tobacco waste[J].Fuel,2015,156:71-80.
-
[15]
梁淼,张明建,鲁端峰,等.热解温度对竹粉炭理化结构及燃烧性能的影响[J].化工进展,2020,39(1):278-286.
-
[16]
秦国鑫,李斌,鲁端峰,等.烟草生物质燃烧特性与机理研究[J].烟草科技,2015,48(1):76-81.
-
[17]
MA Z Q,CHEN D Y,GU J,et al.Determination of pyrolysis characteristics and kinetics of palm kernel shell using TGA-FTIR and model-free integral methods[J].Energy Conversion and Management,2015,89:251-259.
-
[18]
王乐,王亚林,李志强,等.电加热卷烟烟芯段温度分布和烟气关键成分逐口变化:第1部分实验[J].烟草科技,2021,54(3):31-39.
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