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Non-contacting characterization of PM2.5 in dusty environment with THz-TDS

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Science China(Physics,Mechanics & Astronomy) 2016年第4期59卷 86-87页

作者： honglei zhan Kun Zhao LiZhi Xiao State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum

Dear Editors,Nowadays,many developing countries(such as China)are experiencing severe air pollution due to the rapid urbanization and ***2.5,which refers to the particulate matter with an aerodynamic diameter of 2.5mm... 详细信息

关键词：颗粒物光谱表征非接触式太赫兹快速城市化发展中国家环境尘土

Terahertz-dependent evaluation of water content in high-water-cut crude oil using additive-manufactured samplers

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Science China(Physics,Mechanics & Astronomy) 2017年第4期60卷 40-44页

作者： LiMei Guan honglei zhan XinYang Miao Jing Zhu Kun Zhao Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum Beijing 102249 China

The evaluation of water content in crude oil is of significance to petroleum exploration and ***(THz) waves are sensitive to fluctuations in the dipole moment of ***,due to the strong absorption of water in the THz range,it is difficult for the THz spectrum to determine high water content with the common *** this research,micron-grade samplers for THz detection were designed and manufactured using additive manufacturing(AM) ***-water mixtures with water content from 1.8%to 90.6%were measured with the THz-TDS system using sample *** addition,a detailed analysis was performed of the relationships among THz parameters such as signal peak,time delay,and refractive index as well as absorption coefficient and high water content(>60%).Results suggest that the combination of THz spectroscopy and AM technique is effective for water content evaluation in crude oil and can be further applied in the petroleum industry.

关键词： water content crude oil additive manufacturing terahertz spectroscopy

Characterization and evaluation of oil shale based on terahertz spectroscopy: A review

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Energy Reviews 2023年第4期2卷 1-11页

作者： Xuecong Liu Kun Zhao Xinyang Miao honglei zhan College of Information Science and Technology China University of PetroleumBeijing102249China College of New Energy and Materials China University of PetroleumBeijing102249China Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of PetroleumBeijing102249China Key Laboratory of Oil and Gas Terahertz Spectroscopy and Photoelectric Detection Petroleum and Chemical Industry FederationChina University of PetroleumBeijing102249China

Oil shale is a fine-grained sedimentary rock rich in organic kerogen,which is a national strategic reserve resource and supplementary energy and shale oil and pyrolysis gas can be obtained through carbonization and *** to the diversity of main components in oil shale and the complexity of the occurrence relationship between organic matter and minerals,the current understanding of the oil generation potential of oil shale and the dy-namic process of organic matter pyrolysis is still unclear,leading to the relatively backward level of its devel-opment *** development of new theories and methods for efficient utilization of oil shale resources has great strategic *** rotation and vibration frequency of macromolecules in oil shale occur in the terahertz(THz)band,so the THz optical parameters of oil shale can reflect the physical properties of *** this review,the experimental work progress in THz spectroscopy for characterization and evaluation of oil shale is *** shale is high anisotropic,resulting that the anisotropy in THz optical parameters strongly depends on the oil yield which is an effective selection for evaluating the oil yield to avoid the problem of environmental pollution in traditional *** heterogeneous distributions of organics on the oil shale surface,e.g.,the existence of kerogen-rich and kerogen-poor areas,was evaluated by THz amplitude *** addition,the thermal THz analysis technology was developed to determine the pyrolysis process of kerogen and establish the pyrolysis model of kerogen,and the optimization of oil shale pyrolysis process was realized using THz ***,kerogen in oil shale displays a characteristic absorption peak in the THz range,which provides a new insight into the research of kerogen in the micro and nano *** pyrolysis oil shale at high temperature absorbs THz radiation strongly due to the decomposition of pyrite in oil *** recent works sugg

关键词： Oil shale Terahertz spectroscopy Kerogen Anisotropy Yield Pyrolysis Absorption

Nanocrystal technology for drug formulation and delivery

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Frontiers of Chemical Science and Engineering 2015年第1期9卷 1-14页

作者： Tzu-Lan CHANG honglei zhan Danni LIANG Jun F. LIANG Department of Chemistry Chemical Biology and Biomedical Engineering Charles V. Schaefer School of Engineering and Sciences Stevens Institute of Technology Hoboken NJ 07030 USA Stony Brook University School of Medicine Stony Brook NY 11794 USA

With the development of modem technology like high throughput screening, combinatorial chemistry and computer aid drug design, the drug discovery process has been dramatically accelerated. However, new drug candidates often exhibit poor aqueous or even organic medium solubility. Additionally, many of them may have low dissolution velocity and low oral bioavailability. Nanocrystal formulation sheds new light on advanced drug development. Due to small （nano- or micro- meters） sizes, the increased surface-volume ratio leads to drama- tically enhanced drug dissolution velocity and saturation solubility. The simplicity in preparation and the potential for various administration routes allow drug nanocrystals to be a novel drug delivery system for specific diseases （i.e. cancer）. In addition to the comprehensive review of different technologies and methods in drug nanocrystal preparation, suspension, and stabilization, we will also compare nano- and micro-sized drug crystals in pharma- ceutical applications and discuss current nanocrystal drugs on the market and their limitations.

关键词： drug nanocrystal nanotechnology formula-tion bioavailability stabilizers drug delivery

Leakage detection of oil tank using terahertz spectroscopy

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Science China(Technological Sciences) 2021年第9期64卷 1947-1952页

作者： QIN FanKai CHEN SiTong CHEN Ru zhan honglei MIAO XinYang XIANG WenFeng ZHAO Kun College of New Energy and Materials China University of PetroleumBeijing 102249China Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of PetroleumBeijing 102249China Key Laboratory of Oil and Gas Terahertz Spectroscopy and Photoelectric Detection Petroleum and Chemical Industry FederationChina University of PetroleumBeijing 102249China Detection and Beijing Key Laboratory of Failure Corrosionand Protection of Oil/Gas FacilitiesChina University of PetroleumBeijing 102249China

The necessity for safety in oil-gas storage and transportation has led to increasing technical requirements for on-line monitoring of damaged pores and oil leakage from tanks. In this study, the severity of damage of the oil tank at the micron level was detected by terahertz time-domain spectroscopy(THz-TDS), which is of great significance for the early detection and prevention of oil leakage. The THz amplitude(EP) was related to the severity of damaged according to the THz-TDS measurement of oil tanks with various degrees of damage, including intact, partially damaged, completely damaged, and seriously damaged *** and scattering effects co-occurred when the THz wave penetrated the tanks, with the collective tendencies being used to expressly monitor oil leakage from tanks. When the oil tank was damaged to form micron-level pores and the crude oil had not overflowed, the pore size was close to THz wavelength and the Mie scattering effect was obvious. After further destruction of the pores, the crude oil gradually spilled over and the scattering effect was gradually transformed from Mie scattering to Rayleigh scattering. In addition, the polar molecules in crude oil have strong resonance under the irradiation of THz wave, and the THz wave has strong attenuation. Eventually, surface tension of the oil flattens the surface of the tank, the scattering effect is gradually suppressed and replaced by the absorption effect. Absorption and scattering caused by THz waves passing through tanks coexist and have competing relationships. The change rule of EPcan successfully prove the phenomenon and can be considered as an important alternative for application to predict the degree of tank damage. Therefore, in this study, the detection of pores as small as micrometers on the oil tank was expected to greatly prevent oil leakage accidents and improve the safety of oil and gas storage and transportation.

关键词： absorption scattering terahertz spectroscopy oil tank leakage

Non-contacting characterization of oil-gas interface with terahertz wave

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Science China(Physics,Mechanics & Astronomy) 2016年第7期59卷 84-85页

作者： DanDan Wang XinYang Miao honglei zhan Jin Wang Kun Zhao Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum

Dear Editors, The interface ofoil and gas has been a key issue in the process of oil and gas storage and transportation, which is a preparatory work to improve the transport efficiency and prevent oil and gas leaks. There are many methods to characterize the in- terface of oil and gas, such as the ultrasonic transducers and multi-electrode capacitance level sensors. Recently, the application of terahertz （THz） technique has attracted much at- tention in the characterization and evaluation of oil and gas [1-7], such as a magnetic-field-induced disaggregation of the size of suspended colloidal particles in crude oil and pattern transitions of oil-water two-phase flow [6,7]. THz time-do- main spectroscopy （THz-TDS） was expected to detect the interface of oil and gas since oil and gas can be characterized with THz wave. In this letter, a drop of crude oil with its volatile gas from an oilfield, which is inserted in the middle of a resin craft, was selected to probe the interface between oil and gas.

关键词：油气界面太赫兹波接触特性 THz-TDS 液位传感器超声换能器油水两相流挥发性气体

Terahertz-dependent PM2.5 monitoring and grading in the atmosphere

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Science China(Physics,Mechanics & Astronomy) 2018年第10期61卷 60-69页

作者： XinYang Miao honglei zhan Kun Zhao ZhenWei zhang Lei Xu CunLin zhang LiZhi Xiao State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum Department of Material Science and Engineering China University of PetroleumBeijing Department of Physics Capital Normal University

Rapid industrialization and economic development have led to serious pollution in the form of fine particulate matter(PM2.5,particulate matter with a diameter of less than 2.5 μm). In China, PM2.5 has been one of the most debated topics in councils of government and issues of public concern. Terahertz(THz) radiation was employed to measure the PM2.5 in the atmosphere from September 2014 to April 2015 in Beijing. Comparison of the PM2.5 level from the website with THz absorbance revealed a significant phenomenon: THz radiation can be used to monitor PM2.5 in the atmosphere. During Asia-Pacific Economic Cooperation(APEC) 2014, "APEC Blue" was also recorded in a THz system. The relationship between absorbance and PM2.5 demonstrates that THz radiation is an effective selection for air pollution grading. Based on the absorbance spectra, the elemental compositions were studied by two-dimensional correlation spectroscopy(2 DCOS) in conjunction with X-ray *** single absorption peaks were revealed and caused by sulphate from coal combustion, vehicle exhaust emissions and secondary reactions. Furthermore, mathematical algorithms, such as the BPANN and SVM, can process the THz absorbance data and greatly improve the precision of the estimation of PM2.5 mass. Our results suggest that THz spectroscopy can not only reveal the component information for pollution source determination, but quantitatively monitor the PM2.5 content for pollution level evaluation. Therefore, the use of THz radiation is a new method for future air pollution monitoring and grading systems.

关键词： terahertz PM2.5 monitoring grading

Less than 6 GHz resolution THz spectroscopy of water vapor

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Science China(Technological Sciences) 2015年第12期58卷 2104-2109页

作者： zhan honglei SUN ShiNing ZHAO Kun LENG WenXiu BAO RiMa XIAO LiZhi zhanG ZhenWei State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum Department of Physics Capital Normal University

The application of terahertz（THz） technique in many fields like petroleum industry requires the high resolution and multifunction to realize the precise detection of different materials. In this study water vapor in atmosphere was scanned with shortand long-path THz spectrometers with different scan ranges. The full width at half maximum of the THz characteristic lines in long-path system reached less than 7 GHz and that in short achieved -5.5 GHz, indicating that the THz spectroscopy of water vapor can be used to calibrate THz devices. THz systems with right scan ranges could be a promising selection for the identification of solid, liquid and gaseous materials with very similar structures due to the high resolution. The research demonstrates that the multifunctional THz test can be realized through the balance of resolution and sampling space in many fields, such as oil-gas industry.

关键词： terahertz water vapor resolution full width at half maximum

Probing the sulfur content in gasoline quantitatively with terahertz time-domain spectroscopy

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Science China(Physics,Mechanics & Astronomy) 2014年第7期57卷 1404-1406页

作者： QIN FangLi LI Qian zhan honglei JIN WuJun LIU HongLan ZHAO Kun State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Key Laboratory of Oil and Gas Terahertz Spectroscopy and Photoelectric Detection China Petroleum and Chemical Industry Federation(CPCIF)

Terahertz time-domain spectroscopy(THz-TDS)was used for the quantitative detection of sulfur content in *** of chemo metrics methods and partial least squares(PLS)were built to measure THz-TDS and the sulfur *** of the samples were divided into two *** part was used for calibration and the other one for *** order to evaluate the quality of the models,the correlation coefficient(R)and root-mean-square errors(RMSE)of calibration and validation models were *** value of R and RMSE were close to 1 and 0 within acceptable levels,respectively,indicating that the combination of THz-TDS and PLS is a potential method for further quantitative detection.

关键词： sulfur content gasoline terahertz spectroscopy