Rapidly determinating the principal components of natural gas distilled from shale with terahertz spectroscopy

Leng, Wenxiu; Zhan, Honglei; Ge, Lina; Wang, Wei; Ma, Yue; Zhao, Kun; Li, Shuyuan; Xiao, Lizhi

doi:10.1016/j.fuel.2015.06.072

Cited by 24 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A new oil–water test facility suitable for optical measurement is designed, constructed, and operated in this work to investigate the flow pattern transition and slip phenomenon in a horizontal circular pipe. The terahertz (THz) wave is used in the experiment because of its different responses of oil, water, and gas as a result of divergences in molecular configuration of them. − Terahertz time-domain spectroscopy (THz-TDS) technology has drawn more and more attention on applications in the energy field, especially in the petroleum industry. − Owing to the sensitivity of THz to the fluctuations of water dipole moments that occur on the picoseconds (ps) time scale, the THz technology can detect the subtle change of water molecules . A new means has been proposed to monitor the dynamic process of oil–water two-phase flow using THz-TDS.…”

Section: Introductionmentioning

confidence: 99%

Reliable Evaluation of Oil–Water Two-Phase Flow Using a Method Based on Terahertz Time-Domain Spectroscopy

et al. 2017

Self Cite

View full text Add to dashboard Cite

Oil–water two-phase flow widely exists in the petroleum industry, such as crude oil production and transportation. The flow pattern and slip phenomenon of oil–water two-phase flow have an important impact on the rational design and management of oil wells and pipelines. Because of the extremely high sensitivity of the terahertz wave to hydrogen bonding, terahertz time-domain spectroscopy (THz-TDS) is used to study oil–water two-phase flows with the input water fraction ranging from 0.5 to 5.0%. The flow rate is controlled in the range of 0.6–0.0 m3/h, and the flow pattern transition and slip phenomenon in horizontal circular pipes have been studied experimentally and theoretically. In a word, the flow pattern and critical flow rate for the flow pattern transition can be distinguished by amplitudes of THz-TDS of the oil–water two-phase flows. The work indicates that, at a low Q value, the flow pattern is an oil layer over a dispersion of water-in-oil (O & DW/O) flow and the ratio of in situ oil to water velocity is smaller than those at a high Q value, where the flow is a water-in-oil (W/O) flow.

show abstract

Section: Introductionmentioning

confidence: 99%

Reliable Evaluation of Oil–Water Two-Phase Flow Using a Method Based on Terahertz Time-Domain Spectroscopy

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…The refractive index is a valid parameter for analyzing material composition and structural changes. 22 The average refractive indexes of unetched and etched samples in the frequency range of 0.9–1.8 THz were calculated and the results are shown in Fig. 7.…”

Section: Resultsmentioning

confidence: 99%

“…The latest applications mainly focus on clay mineral structure, 19 lithology identification, 20 kerogen pyrolysis, 21 and coal, oil, and gas components. [22][23][24] Terahertz time domain spectroscopy (THz-TDS) is a non-ionizing, non-contact transmission spectrum detection technique that can provide abundant phase and amplitude information of anomalous lattice vibrations caused by componential and structural changes of materials and therefore suitable for fission-track research. The signal-to-noise (S/N) ratio and stability of THz-TDS are substantially higher than those of Fourier transform infrared (FT-IR) spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Identification of the Annealing Degree of Apatite Fission Tracks Using Terahertz Time Domain Spectroscopy (THz-TDS)

Shi-xiang

Qiu

et al. 2018

Appl Spectrosc

View full text Add to dashboard Cite

Apatite fission-track (AFT) analysis, a widely used low-temperature thermochronology method, can provide details of the hydrocarbon generation history of source rocks for use in hydrocarbon exploration. The AFT method is based on the annealing behavior of fission tracks generated by U fission in apatite particles during geological history. Due to the cumbersome experimental steps and high expense, it is imperative to find an efficient and inexpensive technique to determinate the annealing degree of AFT. In this study, on the basis of the ellipsoid configuration of tracks, the track volume fraction model (TVFM) is established and the fission-track volume index is proposed. Furthermore, terahertz time domain spectroscopy (THz-TDS) is used for the first time to identify the variation of the AFT annealing degree of Durango apatite particles heated at 20, 275, 300, 325, 450, and 500 ℃ for 10 h. The THz absorbance of the sample increases with the degree of annealing. In addition, the THz absorption index is exponentially related to annealing temperature and can be used to characterize the fission-track volume index. Terahertz time domain spectroscopy can be an ancillary technique for AFT thermochronological research. More work is urgently needed to extrapolate experimental data to geological conditions.

show abstract

“…TDS was used to demonstrate that THz measurements can establish the mixing ratios of natural gas [184,185]. As seen in Figure 25, the refractive index provides a good indicator of the mix, due to the differences in the indices of individual gases.…”

Section: Gas Sensingmentioning

confidence: 99%

Industrial Applications of Terahertz Sensing: State of Play

Naftaly

Vieweg

Deninger

2019

Sensors

248

106

View full text Add to dashboard Cite

show abstract

Rapidly determinating the principal components of natural gas distilled from shale with terahertz spectroscopy

Cited by 24 publications

References 20 publications

Reliable Evaluation of Oil–Water Two-Phase Flow Using a Method Based on Terahertz Time-Domain Spectroscopy

Reliable Evaluation of Oil–Water Two-Phase Flow Using a Method Based on Terahertz Time-Domain Spectroscopy

Quantitative Identification of the Annealing Degree of Apatite Fission Tracks Using Terahertz Time Domain Spectroscopy (THz-TDS)

Industrial Applications of Terahertz Sensing: State of Play

Contact Info

Product

Resources

About