激光拉曼光谱技术在天然气水合物研究中的应用进展OA

As a significant direction for future energy development,natural gas hydrate research on its composition,structural characteristics,as well as synthesis and decomposition mechanisms is of great importance for resource assessment,exploitation and utilization.Based on an investigation of the latest research achievements worldwide,the application progress of laser Raman spectroscopy in natural gas hydrate research is mainly reflected in four aspects.With its non-destructive nature and high sensitivity,laser Raman spectroscopy provides a reliable technical approach for accurately identifying multi-component gas molecule types and their corresponding vibrational modes in hydrates.The unique Raman shift characteristics of different guest molecules can reveal the microstructure and dynamic behavior of gas molecules in various types of natural gas hydrates,facilitating the understanding of the formation mechanisms and structural evolution of natural gas hydrates.The intensity ratio of Raman spectra can be used to quantitatively characterize the cage occupancy and hydration number of different natural gas hydrates,providing an effective method for investigating the methane purity and storage capacity of natural gas hydrates in real systems.Laser Raman spectroscopy enables in-situ monitoring of morphological evolution and concentration variation characteristics of different guest molecules during the entire formation and dissociation process of natural gas hydrates under laboratory conditions,providing a new perspective for in-depth understanding of the microscopic kinetic processes of natural gas hydrates.Additionally,the integration of laser Raman spectroscopy with other analytical techniques exhibits promising potential in the precise characterization of internal hydrate structures,molecular migration dynamics,and in-situ hydrate detection.For future studies,priority should be given to the advancement of high-precision Raman measurement techniques,the optimization of spectral data processing algorithms,and the improvement of automation for in-situ Raman monitoring.The establishment of a multi-modal combined characterization system is expected to provide powerful technical support for the exploration and sustainable development of natural gas hydrate resources.