摘要
生物质是唯一能够直接转化为燃料的可再生能源,其开发利用既可以弥补低碳能源的需求,减少环境污染,也是中国实现“碳中和”目标的重要手段。该研究围绕以秸秆为主的生物质资源制备清洁能源和高值利用的总目标,系统分析生物质资源通过生物或热化学等转化途径制备气、液、固三相清洁能源的综合利用技术和模式,重点论述厌氧消化制备生物燃气、水热催化炼制醇烃燃料、裂解液化与生物油提质和生物质制备固体燃料4项技术发展现状与研究进展。在4项生物质转化技术中,厌氧消化制备生物天然气工业化程度最高,由于其大都基于大型养殖场建立,可有效解决原料收集问题,而且厌氧消化技术与沼气净化技术相对较为成熟,生物天然气可直接作为燃料、电力和热力来源供用户使用;由于生物质制备液体燃料中存在转化过程成本较高、产物分离困难、提质效率低、产品不稳定等问题,很难与当前应用端平稳接轨,因此水热催化炼制醇烃燃料、裂解液化制备生物油技术规模化发展水平较低;对于生物质制备固体燃料,其成型技术较为成熟,配套炉具的研发也有效解决了成型燃料应用端的问题,其规模化应用最大的难点在于原料的收集与存储。文章最后对未来生物天然气、生物质液体燃料与固体成型燃料发展前景进行展望,为实现农村生物质资源高效制备清洁能源及高值利用提供借鉴。
Biomass has been the only renewable energy that can be directly converted into fuel.The full utilization of biomass can effectively alleviate energy needs in an eco-friendly way.It is also an important path for China to achieve the goal of"carbon neutrality".Therefore,this study aims to focus mainly on the general goal of clean energy production and high-value utilization for straw-based biomass resources in recent years.A systematic analysis was made to evaluate the comprehensive utilization technology and mode of producing gas,liquid,and solid clean energy in the biological or thermo-chemical way.The development status and research progress were concentrated upon the anaerobic digestion for biogas,hydrothermal catalysis for alcohol and hydrocarbon fuel,pyrolysis liquefaction and bio-oil upgrading,and solid fuel production.Particularly,an attempt was addressed on the prospect of biogas,liquid fuel,and solid fuel.More importantly,no matter what biomass conversion technology was adopted,biomass resources utilization should be comprehensive and of high value.Correspondingly,the large-scale application required at least three basic elements.The first was the scale collection and disposal of biomass raw materials at a low cost.The second was the efficient and stable transformation,as well as quality improvement technology.The last was that the terminal fuel products needed to connect smoothly with the current application.Among them,anaerobic digestion for biogas presented the highest level of industrialization in recent years,due mainly to effectively solving raw materials collection in large breeding farms.It infers that the anaerobic digestion and biogas purification technology were relatively mature during this time.As such,biogas was directly used as a source of fuel,power,and thermal production.By contrast,hydrothermal catalysis for alcohol and hydrocarbon fuel,together with pyrolysis liquefaction for bio-oil was relatively difficult to connect with the current application,due mainly to the high conversion cost,difficult product separation,low-quality improvement efficiency,and unstable products.Therefore,the large-scale development level of the two technologies was relatively low during this time.Nevertheless,the technology of biomass preparation was relatively mature for solid fuels.The research and development of supporting stoves also effectively implemented the application of molding fuel.But the biggest difficulty in the scale application lay in the collection and storage of raw materials.Finally,the development prospects were proposed for the biomass conversion technologies.In terms of biogas,the anaerobic digestion was enhanced by multi-ingredients and bio-strengthen to improve biogas production efficiency.A precise control system should be established for the high concentration anaerobic digestion for better stability.Particularly,the comprehensive utilization of biogas slurry was carried out to realize the nutrient recycling,and biological organic fertilizer,or carbon-based fertilizer for nitrogen and carbon fixation,with emphasis on the efficiency of desulfurization and decarbonization.In terms of liquid fuel,the unpolluted depolymerization can be explored from lignocellulose to platform compounds,especially how to realize the efficient separation and quality improvement of platform compounds.During the quality upgrading process,the multi-step reaction combined catalyzer can be used to shorten the process and improve the reaction efficiency.In addition,the efficient conversion of biomass resources into fuel,chemicals,and materials should be developed synchronously for higher-value products.In terms of solid fuel,the heat transfer and bonding mechanism of torrefaction straw should be studied during the molding process,further to realize the low energy consumption and high quality.New efficient molding and combustion equipment needed to be improved the reliability of solid fuel production,particularly on the standardization,series,and package of torrefaction,molding,and combustion equipment.Consequently,the standard production of biomass collection,storage,and combustion should be improved to form biomass solid fuel industry chain from collection,storage,transportation,molding,and distribution.This research can provide a strong reference for the efficient preparation of clean energy and high-value utilization in rural biomass.
作者
王芳
刘晓风
陈伦刚
雷廷宙
易维明
李志合
Wang Fang;Liu Xiaofeng;Chen Lungang;Lei Tingzhou;Yi Weiming;Li Zhihe(School of Agricultural Engineering and Food Science,Shandong University of Technology,Zibo 255000,China;Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041,China;Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510650,China;Henan Academy of Sciences,Zhengzhou 450002,China)
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2021年第18期219-231,共13页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家重点研发计划资助(2019YFD1100600)。
