生物质水蒸气催化气化制备富氢合成气
发布时间：2021-03-08 23:12
由于能源价格上涨和燃料化石枯竭等原因,各国正转向使用可再生和可持续能源。目前有许多可替代能源新技术,而生物质气化是其中一种重要的技术。生物质气化制氢被认为是一种理想的可再生能源,在未来的氢能源经济中将占有举足轻重的地位。生物质中木质素和纤维素具有不同的化学反应活性,因此不同组分的生物质在气化过程具有不同的反应特性。气化过程中伴随产生二氧化碳,二氧化碳是一种导致全球变暖的温室气体。在气化过程中加入固碳吸收剂（如CaO）,二氧化碳可被固体吸收剂吸收,生产富氢合成气并捕集二氧化碳。论文开展生物质不同组分（纤维素和木质素）对气化产物以及CaO催化剂性能的影响,并对生物质富氢气化过程中钙基吸附剂的性能进行改性和评价,对生物质清洁利用具有重要意义。论文基于钙基二氧化碳吸收剂,研究了生物质富氢气化特性;根据生物质富含木质素和纤维素的特点,研究了纤维素、木质素、模拟生物质以及富含纤维素和富含木质素的实际生物质在钙基吸收剂条件下的气化特性和气体产物分布规律;明确了木质素和纤维素对CaO催化活性的影响规律;研究了ZrO2和CeO2改性Fe/CaO对生物质富氢气化...
【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】：97 页
【学位级别】：博士
【文章目录】：
摘要
Abstract
Chapter1 Introduction
1.1 Introduction
1.2 Literature review
1.2.1 Properties of biomass
1.2.2 Composition of biomass
1.2.3 Biomass conversion to energy
1.2.4 Gasification principle
1.2.5 Gasifier Operating Conditions
1.2.6 Importance of research work
1.3 Research Questions
1.4 Objectives of the research
1.5 Outlines of the study
Chapter2 Elucidation of syngas composition from catalytic steam gasification
2.1 Introduction
2.2 Experimental setup
2.2.1 Preparations of materials and catalyst
2.2.2 Gasification apparatus and procedure
2.3 Results and discussion
2.3.1 Effect of CaO loading ratio on steam gasification of cellulose and lignin
2.3.2 Effect of temperature on steam gasification of cellulose and lignin
2.3.3 Comparative analysis of cellulose and lignin gasification
2.3.4 Gasification of real and simulated biomass
2.4 Chapter summary
Chapter3 Effects of cellulose and lignin on products of calcium oxide（CaO） in biomass gasification
3.1 Introduction
3.2 Material and Methods
3.2.1 Preparations of materials and catalyst
3.2.2 Gasification procedure
3.3 Results and discussion
3.3.1 Gasification of cellulose and lignin
3.3.2 Gasification of actual biomass in the presence of CaO
3.4 Characterization of spent catalysts
3.4.1 Pore volume and specific surface
3.4.2 TG characterization of the coke
3.4.3 EDX and XRD analysis
3.5 Chapter summary
Chapter4 Effects of Fe/ZrO2 and Fe/CeO2 addition on CaO catalyst
4.1 Introduction
4.2 Materials and methods
4.2.1 Materials
4.2.2 Preparation of Catalysts
4.2.3 Experimental setup
4.3 Results and discussion
4.3.1 Characterization of catalysts
4.3.2 Effect of elements loading content
4.4 Characterization of gasified residues
4.4.1 SEM
4.4.2 EDX
4.4.3 TG and DTG analysis of coke
4.4.4 XRD
4.5 Cyclic stability of the Zr-Fe/CaO catalyst
4.6 Chapter summary
Chapter5 Chemometric modelling on element compositions and product distributions of cellulose and lignin
5.1 Introduction
5.2 Materials and methods
5.2.1 Feedstocks
5.2.2 Data collection
5.2.3 Statistical analysis
5.3 Results and discussion
5.3.1 Correlation between feedstocks based on elemental composition
5.3.2 Correlation between feedstocks based on product composition
5.3.3 Elemental composition and chemical structure of components
5.4 Chapter summary
Chapter6 Conclusion and Recommendations
6.1 Conclusion
6.2 Recommendation
Acknowledgement
Appendix A Element compositions of selected samples
Appendix B Syngas composition and product distribution
Appendix C List of papers
References
【参考文献】：
期刊论文
[1]Characteristics of reactivity and structures of palm kernel shell （PKS） biochar during CO2/H2O mixture gasification[J]. Guozhang Chang,Ximin Yan,Pengyu Qi,Mei An,Xiude Hu,Qingjie Guo. Chinese Journal of Chemical Engineering. 2018(10)
[2]Biomass gasification technology: The state of the art overview[J]. Antonio Molino,Simeone Chianese,Dino Musmarra. Journal of Energy Chemistry. 2016(01)
本文编号：3071823
【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】：97 页
【学位级别】：博士
【文章目录】：
摘要
Abstract
Chapter1 Introduction
1.1 Introduction
1.2 Literature review
1.2.1 Properties of biomass
1.2.2 Composition of biomass
1.2.3 Biomass conversion to energy
1.2.4 Gasification principle
1.2.5 Gasifier Operating Conditions
1.2.6 Importance of research work
1.3 Research Questions
1.4 Objectives of the research
1.5 Outlines of the study
Chapter2 Elucidation of syngas composition from catalytic steam gasification
2.1 Introduction
2.2 Experimental setup
2.2.1 Preparations of materials and catalyst
2.2.2 Gasification apparatus and procedure
2.3 Results and discussion
2.3.1 Effect of CaO loading ratio on steam gasification of cellulose and lignin
2.3.2 Effect of temperature on steam gasification of cellulose and lignin
2.3.3 Comparative analysis of cellulose and lignin gasification
2.3.4 Gasification of real and simulated biomass
2.4 Chapter summary
Chapter3 Effects of cellulose and lignin on products of calcium oxide（CaO） in biomass gasification
3.1 Introduction
3.2 Material and Methods
3.2.1 Preparations of materials and catalyst
3.2.2 Gasification procedure
3.3 Results and discussion
3.3.1 Gasification of cellulose and lignin
3.3.2 Gasification of actual biomass in the presence of CaO
3.4 Characterization of spent catalysts
3.4.1 Pore volume and specific surface
3.4.2 TG characterization of the coke
3.4.3 EDX and XRD analysis
3.5 Chapter summary
Chapter4 Effects of Fe/ZrO2 and Fe/CeO2 addition on CaO catalyst
4.1 Introduction
4.2 Materials and methods
4.2.1 Materials
4.2.2 Preparation of Catalysts
4.2.3 Experimental setup
4.3 Results and discussion
4.3.1 Characterization of catalysts
4.3.2 Effect of elements loading content
4.4 Characterization of gasified residues
4.4.1 SEM
4.4.2 EDX
4.4.3 TG and DTG analysis of coke
4.4.4 XRD
4.5 Cyclic stability of the Zr-Fe/CaO catalyst
4.6 Chapter summary
Chapter5 Chemometric modelling on element compositions and product distributions of cellulose and lignin
5.1 Introduction
5.2 Materials and methods
5.2.1 Feedstocks
5.2.2 Data collection
5.2.3 Statistical analysis
5.3 Results and discussion
5.3.1 Correlation between feedstocks based on elemental composition
5.3.2 Correlation between feedstocks based on product composition
5.3.3 Elemental composition and chemical structure of components
5.4 Chapter summary
Chapter6 Conclusion and Recommendations
6.1 Conclusion
6.2 Recommendation
Acknowledgement
Appendix A Element compositions of selected samples
Appendix B Syngas composition and product distribution
Appendix C List of papers
References
【参考文献】：
期刊论文
[1]Characteristics of reactivity and structures of palm kernel shell （PKS） biochar during CO2/H2O mixture gasification[J]. Guozhang Chang,Ximin Yan,Pengyu Qi,Mei An,Xiude Hu,Qingjie Guo. Chinese Journal of Chemical Engineering. 2018(10)
[2]Biomass gasification technology: The state of the art overview[J]. Antonio Molino,Simeone Chianese,Dino Musmarra. Journal of Energy Chemistry. 2016(01)
本文编号：3071823
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