Design of High Precision Temperature and Pressure Closed-Loop Control System for Methane Carbon Isotope Ratio Measurement by Laser Absorption Spectroscopy

doi:10.15244/pjoes/140290

	Design of High Precision Temperature and Pressure Closed-Loop Control System for Methane Carbon Isotope Ratio Measurement by Laser Absorption Spectroscopy
	Liu Xu 2,3,6; Zhang Zhirong 2,3,4,5; Sun Pengshuai 2,4; Zhang Lewen 2,3; Pang Tao 2,4; Xia Hua 2,4; Wu Bian 2,4; Shu Zhifeng 1; Shu Chimin 7
刊名	POLISH JOURNAL OF ENVIRONMENTAL STUDIES
	2022
卷号	31
关键词	tunable diode laser absorption spectroscopy (TDLAS) CH4 carbon isotope temperature and pressure closed-loop control Allan variance
ISSN号	1230-1485
DOI	10.15244/pjoes/140290
通讯作者	Zhang Zhirong(zhangzr@aiofm.ac.cn)
英文摘要	In order to achieve the accurate measurement of gas stable isotope, according to the structure of gas cavity and the characteristics of optical elements, a constant temperature and pressure gas isotope measurement experimental system based on tunable diode laser absorption spectroscopy (TDLAS) technology is designed, which can achieve high-precision and stable control of temperature and pressure in the box. The hardware circuit system including high-precision constant-current source, two-channel temperature sampling module, conditioning circuit and pressure control circuit is designed in the system. The corresponding system closed-loop control software is developed to ensure the stability of the temperature and pressure of the optical cavity. Through the experimental verification, the temperature is controlled at 35 degrees C and the pressure is controlled at 150 mbar in the present work. The measurement results verified the stability of the temperature and pressure system, as follows: the optimal temperature fluctuation control is +/- 0.005 degrees C and the pressure stability is +/- 0.1 mbar. Then, in our experiment, the CH4 standard gas is introduced to measure carbon isotope ((CH4)-C-12 and (CH4)-C-13). The results clearly show that the control system is sufficiently stable to be used and the delta C-13 value can reach 0.52 parts per thousand according to the Allan variance.
资助项目	National Natural Science Foundation of China[11874364] ; National Natural Science Foundation of China[41877311] ; National Natural Science Foundation of China[42005107] ; National Natural Science Foundation of China[41773100] ; External Cooperation Program of Chinese Academy of Sciences[GJHZ1726] ; Key Research and development project of Anhui Province[201904c03020005] ; Key Research and development project of Anhui Province[1804a09020097] ; Major scientific and technological projects in Anhui Province[18030901054] ; Major projects of natural science research in Universities of Anhui Province[KJ2017ZD56] ; Support program for outstanding young talents in Colleges and universities of Anhui Province[gxyqZD2018072] ; Support program for outstanding young talents in Colleges and universities of Anhui Province[gxyq2020061] ; Foundation of President of Hefei Institutes of Physical Sciences, Chinese Academy of Sciences[YZJJ2020N8]
WOS关键词	GAS ; EMISSIONS ; BALANCE ; CH4 ; CO2
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	HARD
WOS记录号	WOS:000799779000040
资助机构	National Natural Science Foundation of China ; External Cooperation Program of Chinese Academy of Sciences ; Key Research and development project of Anhui Province ; Major scientific and technological projects in Anhui Province ; Major projects of natural science research in Universities of Anhui Province ; Support program for outstanding young talents in Colleges and universities of Anhui Province ; Foundation of President of Hefei Institutes of Physical Sciences, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131037]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang Zhirong
作者单位	1.Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys, Ningliu Rd 219, Nanjing 210044, Peoples R China 2.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Anhui Prov Key Lab Photon Devices & Mat, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 5.Adv Laserer Tenonol Lab Anhui Prov, Hefei 230037, Peoples R China 6.Bengbu Univ, Sch Elect & Elect Engn, Bengbu 233030, Peoples R China 7.Yunlin Univ Sci & Technol, Dept Safety Hlth & Environm Engn, Yunlin 64002, Taiwan
推荐引用方式 GB/T 7714	Liu Xu,Zhang Zhirong,Sun Pengshuai,et al. Design of High Precision Temperature and Pressure Closed-Loop Control System for Methane Carbon Isotope Ratio Measurement by Laser Absorption Spectroscopy[J]. POLISH JOURNAL OF ENVIRONMENTAL STUDIES,2022,31.
APA	Liu Xu.,Zhang Zhirong.,Sun Pengshuai.,Zhang Lewen.,Pang Tao.,...&Shu Chimin.(2022).Design of High Precision Temperature and Pressure Closed-Loop Control System for Methane Carbon Isotope Ratio Measurement by Laser Absorption Spectroscopy.POLISH JOURNAL OF ENVIRONMENTAL STUDIES,31.
MLA	Liu Xu,et al."Design of High Precision Temperature and Pressure Closed-Loop Control System for Methane Carbon Isotope Ratio Measurement by Laser Absorption Spectroscopy".POLISH JOURNAL OF ENVIRONMENTAL STUDIES 31(2022).