核壳类生物质微波热解制备高品质生物炭研究

发布时间：2021-08-17 21:29

　　随着能源需求的不断增大,石油资源紧缺和全球气候问题的挑战迫使人们开发更先进的方法来使用生物质资源。微波热解是一种生产优质生物炭的先进技术,该技术不仅可以制备高品质的产品,更重要的是,热解过程绿色环保。在微波场中,热解所需能量以辐射形式传播,区别于传统由外到内的加热技术,该过程具有快速和均匀加热的特点。影响微波热解的因素有很多,包括:反应温度、反应时间、微波功率、反应物类型和微波吸收剂等。本论文使用两种壳类生物质原料制备生物质炭,并对其进行表征分析以及用于重金属吸附研究。实验以椰壳和核桃壳为原料,在不同温度（150,180,200,250,300°C）条件下在管式炉中预处理2小时,然后探究原料在不同微波炭化温度（400,600,800°C）和微波吸收剂（SiC,AC）条件下所得生物质炭的孔隙结构特征,并在600°C、CO₂活化的条件下,进一步探究活化时间（30,50,90,120 min）对所得活性炭品质的影响。研究结果表明,炭化温度的适当升高有助于提高生物质热解炭和活性炭的产率并增大其比表面积。在如下条件下获得的生物炭性能最佳:活化温度600°C,制备时间60 m... 

【文章来源】：东南大学江苏省 211工程院校 985工程院校 教育部直属院校

【文章页数】：62 页

【学位级别】：硕士

【文章目录】：
Abstract
摘要
Chapter 1 INTRODUCTION
    1.1 Introduction
    1.2 Motivation
    1.3 Research Objectives
    1.4 Scope of research
Chapter 2 LITERATURE REVIEW
    2.1 Biomass
        2.1.1 Categories of biomass materials
        2.1.2 Constituents of biomass
            2.1.2.1 Lignin
            2.1.2.2 Cellulose
            2.1.2.3 Hemicellulose
    2.2 Methods of biomass conversion
        2.2.1 Biological process
        2.2.2 Thermo-chemical process
            2.2.2.1 Combustion
            2.2.2.2 Gasification
            2.2.2.3 Liquefaction
            2.2.2.4 Alcoholic fermentation
            2.2.2.5 Pyrolysis
    2.3 Microwave assisted Pyrolysis
        2.3.1.Structure of Microwave Generator
        2.3.2.Magnetron Operation
        2.3.3.Applications of microwaves
        2.3.4.Principles Governing Microwave Pyrolysis
            2.3.4.1.Dielectric properties
            2.3.4.2.Volumetric heating
            2.3.4.3.Selective heating
Chapter 3 MICROWAVE PYROLYSIS OF SHELLS
    3.1 Material
    3.2 Methodology for Experimental System Setup
        3.2.1.Experimental set up
            3.2.1.1 Microwave setup
            3.2.1.2 Furnace
    3.3 Research Methods
        3.3.1 Conditions
        3.3.2 Pretreatment
        3.3.3 Carbonization
    3.4 Result and Discussion
        3.4.1 Analysis of Biomass
        3.4.2 Effect of pyrolysis temperature
        3.4.3 Effect of microwave power on the biochar yield
        3.4.4 Effect of microwave radiation time on biochar yield
        3.4.5 Effect of microwave power on BET
        3.4.6 Effect of residence time on BET surface area
        3.4.7 Effect of microwave absorbent on microwave heating characteristics
        3.4.8 Microwave heating characteristics of different microwave absorbents
Chapter 4 Activation and Utilization of Biochar
    4.1 Introduction
    4.2 Material and Experiment system
        4.2.1 Material
        4.2.2 Activation Experimental System
    4.3 Study on adsorption properties of heavy metal ions
        4.3.1 Absorption System
            4.3.1.1 Static adsorption experiment
            4.3.1.2 Experiment steps
        4.3.2 Adsorption experiment
            4.3.2.1 Adsorption test
            4.3.2.2 Detection process
            4.3.2.3 Data processing
    4.4 Results
        4.4.1 Experimental Data
    4.5 Conclusion
CHAPTER 5 CONCLUSION AND FUTURE WORK
    5.1.Summarize
    5.2.FUTURE WORK
Acknowledgement
Dedication
References
Publication


【参考文献】：
期刊论文
[1]生物黑炭及其增汇减排与改良土壤意义[J]. 张阿凤,潘根兴,李恋卿.  农业环境科学学报. 2009(12)



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