摘要
生物质是地球上最丰富的生物可再生资源,已被认为是替代化石资源缓解全球能源和环境危机的潜在能源。作为碳的唯一可再生来源,生物质可通过多种催化手段和转化途径转化为各种高价值化学品和能源密集型生物燃料。在生物质的转化利用过程中,分析反应物、中间体、副产物和产物的结构和组成等信息对于深入研究反应路径和反应机制,提高转化效率至关重要。具有高灵敏度和实时性的原位红外光谱技术,是基于傅里叶红外光谱的原理,通过装配原位反应池来在线监测实际条件下进行的化学反应,获得物质在反应过程中随反应条件而变化的特征谱图,在生物质转化的分析研究中具有广泛的应用前景。本文综述了近年来原位红外光谱技术在生物质转化研究中的应用,介绍了利用原位红外光谱技术表征分析生物质的转化机理,表征手段包含透射、漫反射(DRIFTS)和衰减全反射(AT R)等模式。针对生物质高价值利用的不同转化策略进行了分类综述,重点讨论了原位红外光谱技术在研究热解反应、化学催化反应、电催化反应机理等方面的最新进展,反应过程涉及氢解、加氢、氧化、还原、异构化等多种催化手段,通过跟踪反应物结构和官能团的变化,深入研究反应路线、反应机制和反应动力学。并总结了原位红外光谱技术不同的测试模式分别在研究热解反应、化学催化反应、电催化反应机理时的优势和局限。最后,针对目前原位红外光谱技术应用于生物质转化过程中存在的一些挑战和困难,展望了原位红外光谱技术的发展方向和潜力,包括对原位池进行技术优化以提升极端反应条件的适配性和发展原位红外光谱与质谱、拉曼光谱的多模态联用技术,为深入研究生物质转化机理带来更为积极的影响。
Biomass,as the most abundant bio-renewable resource on Earth,has been recognized as a potential energy source to replace fossil resources and mitigate global energy and environmental crises.As the sole renewable carbon source,biomass can be converted into high-value chemicals and energy-intensive biofuels through various catalytic methods and conversion pathways.In the process of biomass conversion,it is essential to analyze the structure and composition of reactants,intermediates,by products,and products for the study of reaction pathways and reaction mechanisms to improve conversion efficiency.Based on the principle of Fourier infrared spectroscopy,in situ infrared spectroscopy technology with high sensitivity and real-time capabilities is used to monitor online chemical reactions by assembling an in situ reaction tank.It is capable of obtaining the characteristic spectra of substances changing with the reaction conditions,and has a wide range of application prospects in the research of biomass conversion.In this paper,the application of in situ infrared spectroscopy in recent years to research biomass conversion is reviewed.The transformation mechanism of biomass is analyzed using in situ infrared spectroscopy,which includes transmission,diffuse reflection(DRIFTS),and attenuated total reflection(ATR)modes.A categorized review of various conversion strategies for the high-value utilization of biomass is presented,focusing on recent advances in in situ infrared spectroscopy in the study of pyrolysis,chemical catalysis,and electrocatalysis reaction mechanisms.The reaction process involves a variety of catalytic methods,including hydrolysis,hydrogenation,oxidation,reduction,and isomerization,among others.The reaction route,reaction mechanism,and reaction kinetics are studied in depth by tracking the changes in reactant structure and functional groups.It also summarizes the advantages and limitations of various testing modes in in situ infrared spectroscopy when applied to investigate the reaction mechanisms of pyrolysis,chemical catalysis,and electrocatalysis.Finally,addressing the current challenges and difficulties in applying in situ infrared spectroscopy to biomass conversion processes,this study proposes the future directions and potential of this technology.These include technical optimization of in situ reaction cells to enhance compatibility with extreme reaction conditions,as well as the development of multimodal coupling techniques,such as integrating in situ infrared spectroscopy with mass spectrometry and Raman spectroscopy.Such advancements are expected to provide deeper insights into biomass conversion mechanisms and foster more significant breakthroughs in this field.
作者
卢思
陈晓丽
梁正
王小曼
苏秋成
亓伟
付娟
LU Si;CHEN Xiao-li;LIANG Zheng;WANG Xiao-man;SU Qiu-cheng;QI Wei;FU Juan(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China)
出处
《光谱学与光谱分析》
北大核心
2025年第10期2701-2710,共10页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(22378391,22361132543)
中国科学院技术支撑人才项目(E2298501)
广东省科技计划项目(2023B1212060048)资助。
关键词
原位红外光谱
生物质
转化机理
原位表征
In situ FTIR
Biomass
Conversion mechanisms
In situ characterization
