Passive wireless surface acoustic wave sensors for monitoring sequestration sites CO<sub>2</sub> emission

doi:10.2172/1164224

GSTDTAP > 地球科学

DOI	10.2172/1164224
报告编号	None
来源ID	OSTI ID: 1164224
	Passive wireless surface acoustic wave sensors for monitoring sequestration sites CO₂ emission
	Wang, Yizhong [Univ. of Pittsburgh, PA (United States)]; Chyu, Minking [Univ. of Pittsburgh, PA (United States)]; Wang, Qing-Ming [Univ. of Pittsburgh, PA (United States)]
	2013-02-14
出版年	2013
页数	126
语种	英语
国家	美国
领域	地球科学
英文摘要	University of Pittsburghâs Transducer lab has teamed with the U.S. Department of Energyâs National Energy Technology Laboratory (DOE NETL) to conduct a comprehensive study to develop/evaluate low-cost, efficient CO₂ measuring technologies for geological sequestration sites leakage monitoring. A passive wireless CO₂ sensing system based on surface acoustic wave technology and carbon nanotube nanocomposite was developed. Surface acoustic wave device was studied to determine the optimum parameters. Delay line structure was adopted as basic sensor structure. CNT polymer nanocomposite was fabricated and tested under different temperature and strain condition for natural environment impact evaluation. Nanocomposite resistance increased for 5 times under pure strain, while the temperature dependence of resistance for CNT solely was -1375ppm/Â°C. The overall effect of temperature on nanocomposite resistance was -1000ppm/Â°C. The gas response of the nanocomposite was about 10% resistance increase under pure CO₂ . The sensor frequency change was around 300ppm for pure CO₂ . With paralyne packaging, the sensor frequency change from relative humidity of 0% to 100% at room temperature decreased from over 1000ppm to less than 100ppm. The lowest detection limit of the sensor is 1% gas concentration, with 36ppm frequency change. Wireless module was tested and showed over one foot transmission distance at preferred parallel orientation.
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/6280
专题	地球科学
推荐引用方式 GB/T 7714	Wang, Yizhong [Univ. of Pittsburgh, PA ,Chyu, Minking [Univ. of Pittsburgh, PA ,Wang, Qing-Ming [Univ. of Pittsburgh, PA . Passive wireless surface acoustic wave sensors for monitoring sequestration sites CO₂ emission,2013.