Comparison of Raman spectral characteristics and quantitative methods between 13CH4 and 12CH4 from 25 to 400 °C and 50 to 400 bar
文献类型：期刊论文
| 作者 | Ge, Yuzhou1,2,3,4; Li, Lianfu1,3,4 ; Xi, Shichuan1,3,4; Zhang, Yitong1,2,3,4; Luan, Zhendong1,2,3,4; Zhang, Xin1,2,3,4
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| 刊名 | SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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| 出版日期 | 2024-01-05 |
| 卷号 | 304页码:13 |
| 关键词 | Raman spectroscopy In situ Quantitative analysis Carbon isotope 13 CH 4 12 CH 4 |
| ISSN号 | 1386-1425 |
| DOI | 10.1016/j.saa.2023.123380 |
| 通讯作者 | Zhang, Xin(xzhang@qdio.ac.cn) |
| 英文摘要 | In recent years, increasing attention has been given to quantifying the isotopic compositions of gases by Raman spectroscopy. However, related research on the carbon isotopes of CH4 is still lacking. In this study, the Raman spectral characteristics of 13CH4 and 12CH4 in the pure CH4 system and in the CH4-H2O system are comprehensively studied at temperatures ranging from 25 to 400 degrees C and pressures ranging from 50 to 400 bar. For the pure CH4 system, the peak positions of the symmetric stretching band (v1) of 13CH4 and 12CH4 both shift to a higher wavenumber with increasing temperature and decreasing pressure, and their full width at half maximum (FWHM) values can reach 4.7 cm- 1 and 5.5 cm- 1, respectively, with increasing temperature and density. The peak position of the v1 band of 13CH4 is always 4.6-5.1 cm- 1 lower than that of 12CH4 under the same conditions, indicating that 13CH4 and 12CH4 can be distinguished by peak position and FWHM in the Raman spectra. Although the calculated Raman shifts (v0) at zero-density for 13CH4 and 12CH4 are different, the unified equation for determining the density of CH4-rich fluid inclusions is still applicable, as long as to bracket the sample measurement with measurements of reference standards. For the CH4-H2O system, the peak position of the v1 band of dissolved 13CH4 is approximately 2.5 cm- 1 lower than that of 12CH4, while their FWHM values can be more than 12.2 cm-1, causing more difficulty in distinguishing them in aqueous solutions. In addition, Raman quantitative calibration models of 12CH4 and 13CH4 in the CH4-H2O system are established. The difference in the Raman scattering cross section (RSCS) of dissolved 12CH4 and 13CH4, rather than changes in the molar density or RSCS of water is the main reason leading to the difference in the Raman quantitative calibration models of CH4 concentrations between the 12CH4-H2O system and the 13CH4-H2O system. Our work provides a good reference for the in situ identification and quantification of the carbon isotopic composition of CH4 in high-temperature and high-pressure environments. |
| WOS关键词 | CARBON-ISOTOPE FRACTIONATION ; UPPER-MANTLE TEMPERATURES ; METHANE-BEARING MELT ; O-H-N ; FLUID INCLUSIONS ; HIGH-PRESSURE ; HYDROTHERMAL VENT ; CH4 ; WATER ; SOLUBILITY |
| 资助项目 | National Natural Science Foundation of China[92058206] ; National Natural Science Foundation of China[42106184] ; National Natural Science Foundation of China[42221005] ; National Natural Science Foundation of China[41822604] ; Strategic Priority Research Program, CAS[XDA22050102] ; Strategic Priority Research Program, CAS[XDA19060402] ; Open Fund of the Key Laboratory of Marine Geology and Environment, CAS[MGE2021KG06] ; Young Taishan Scholars Program[tsqn201909158] ; China Postdoctoral Science Foundation[2020M682245] ; Natural Science Foundation of Shandong Province[ZR2021QD046] ; Special Research Assistant Project of Chinese Academy of Sciences |
| WOS研究方向 | Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:001300778600001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/198164]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
| 通讯作者 | Zhang, Xin |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.LaoShan Lab, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ge, Yuzhou,Li, Lianfu,Xi, Shichuan,et al. Comparison of Raman spectral characteristics and quantitative methods between 13CH4 and 12CH4 from 25 to 400 °C and 50 to 400 bar[J]. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,2024,304:13. |
| APA | Ge, Yuzhou,Li, Lianfu,Xi, Shichuan,Zhang, Yitong,Luan, Zhendong,&Zhang, Xin.(2024).Comparison of Raman spectral characteristics and quantitative methods between 13CH4 and 12CH4 from 25 to 400 °C and 50 to 400 bar.SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,304,13. |
| MLA | Ge, Yuzhou,et al."Comparison of Raman spectral characteristics and quantitative methods between 13CH4 and 12CH4 from 25 to 400 °C and 50 to 400 bar".SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 304(2024):13. |
入库方式： OAI收割
来源：海洋研究所
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