Determination of methane during anaerobic digestion by tunable diode laser absorption spectroscopy (TDLAS)

IF 1.3 4区工程技术 Q4 CHEMISTRY, ANALYTICAL

Instrumentation Science & Technology Pub Date : 2023-01-12 DOI:10.1080/10739149.2023.2167211

H. Cui, Fei Wang, Shengyu Hu, Wenyuan Wang, Jinhui Fan

引用次数: 0

Abstract

Abstract This paper presents the design and application of a near-infrared laser absorption-based sensor for methane measurements during anaerobic digestion using an optical probe inserted into an anaerobic tank reactor. The wavelength of the laser was scanned across the absorption lines of methane near 1.65 µm to provide the real-time concentration. A probe was designed for optical measurement. This technique was validated by measuring methane in the laboratory and anaerobic digestion tank reactor. A set of reference values spanning from 30 to 52%, covering the typical concentrations during anaerobic digestion, were measured to validate the reliability of the system. The spectrometrically derived methane concentrations showed high consistency with the reference values, and an R2 of 0.999 revealed that the system was reliable. In addition, the detection limit was estimated by the uncertainty of the intercept to be 0.27% with an accuracy of 0.1% and a temporal resolution of 1 s.

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可调谐二极管激光吸收光谱法测定厌氧消化过程中的甲烷

摘要本文介绍了一种基于近红外激光吸收的厌氧消化甲烷传感器的设计和应用，该传感器采用插入厌氧罐式反应器的光学探针来测量厌氧消化过程中的甲烷。激光波长扫描甲烷在1.65µm附近的吸收线，以提供实时浓度。设计了一种用于光学测量的探针。在实验室和厌氧消化罐式反应器中测量了甲烷，验证了该技术的有效性。测量了一组参考值，范围从30到52%，涵盖厌氧消化过程中的典型浓度，以验证系统的可靠性。测定的甲烷浓度与参考值具有较高的一致性，R2为0.999，表明系统可靠。此外，通过截距的不确定度估计，检测限为0.27%，精度为0.1%，时间分辨率为1 s。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Instrumentation Science & Technology 工程技术-分析化学

CiteScore

3.50

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Instrumentation Science & Technology is an internationally acclaimed forum for fast publication of critical, peer reviewed manuscripts dealing with innovative instrument design and applications in chemistry, physics biotechnology and environmental science. Particular attention is given to state-of-the-art developments and their rapid communication to the scientific community. Emphasis is on modern instrumental concepts, though not exclusively, including detectors, sensors, data acquisition and processing, instrument control, chromatography, electrochemistry, spectroscopy of all types, electrophoresis, radiometry, relaxation methods, thermal analysis, physical property measurements, surface physics, membrane technology, microcomputer design, chip-based processes, and more. Readership includes everyone who uses instrumental techniques to conduct their research and development. They are chemists (organic, inorganic, physical, analytical, nuclear, quality control) biochemists, biotechnologists, engineers, and physicists in all of the instrumental disciplines mentioned above, in both the laboratory and chemical production environments. The journal is an important resource of instrument design and applications data.