Fast pyrolysis behavior of fungus residues in a fluidized bed reactor

doi:10.16085/j.issn.1000-6613.2017.03.046

Abstract

Abstract:

The isothermal pyrolysis reaction characteristics of penicillin fungus residues with the presence of argon were experimentally studied using a micro fluidized bed reaction analyzer. Based on the statistics,iso-conversional method and model fit method were used to calculate the kinetic parameters of formation of H₂,CH₄,CO₂ and CO. Results indicated that the yield of bio-oil increased to a maximum value and then went down as temperature increased. The highest liquid yield of 33.5% was achieved at 600℃. The total gas production rate increased with the increase of reaction temperature. The average conversion rate of the gaseous product was also fast. The evolution profiles of hydrogen energy and carbon monoxide were more affected by reaction temperature compared to methane and carbon dioxide. For the range of conversion investigated,the average activation energies for H₂,CH₄,CO₂ and CO were 20.88kJ/mol,39.81kJ/mol,23.39kJ/mol and 10.27kJ/mol,respectively. It indicated that the difficulty for the main gas components generation ranks. For the same product,the difference between apparent activation energy in different conversion showed that reaction mechanism varied at different stages. The most probable reaction order of CH₄ produced through pyrolysis was 1.5,while that of H₂、CO and CO₂ were 2.

Key words: micro fluidized bed reaction analyzer, penicillin fungus residues, pyrolysis, reaction kinetics

摘要：

选取青霉素菌渣在微型流化床反应分析仪中进行了快速热解实验，研究了热解产物随温度的变化规律，并采用等转化率法和模型配合法对实验数据进行回归拟合，求算反应动力学参数，分析反应机理。结果表明：随热解温度升高，气体产量增加，焦炭产量减少，生物油的产量先增加后减少，在600℃左右时达到最大值，约为33.5%。而且温度的升高加快气体产物的转化速率，其中对CO和CH₄转化速率的影响要比H₂和CO₂明显。利用等温法求算出的气体产物（H₂、CH₄、CO₂和CO）的活化能平均值分别为20.88kJ/mol、39.81 kJ/mol、23.39kJ/mol和10.27kJ/mol，生成CH₄、H₂、CO₂、CO的难度依次下降；同一产物不同转化率下的活化能存在差异，表明不同反应阶段有不同的反应机理。热解过程中生成CH₄的反应符合1.5级化学反应，而H₂、CO和CO₂的生成符合2级化学反应。

关键词: 微型流化床, 青霉素菌渣, 热解, 反应动力学

CLC Number:

WANG Bin, DONG Yuping, MAO Yebing, CHANG Jiafu. Fast pyrolysis behavior of fungus residues in a fluidized bed reactor[J]. Chemical Industry and Engineering Progress, 2017, 36(03): 1113-1119.

王斌, 董玉平, 毛叶兵, 常加富. 抗生素菌渣的流化床快速热解特性[J]. 化工进展, 2017, 36(03): 1113-1119.

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