Abstract
This paper presents a highly sensitive, energy efficient and low-cost distributed methane (CH4) sensor system (DMSS) for continuous monitoring, detection and localization of CH4 leaks in natural gas infrastructure such as transmission and distribution pipelines, wells, and production pads. The CH4 sensing element, a key component of the DMSS, consists of a metal oxide functionalized multi-walled carbon nanotube (MWCNT) mesh which, in comparison to existing literature, shows stronger relative resistance change while interacting with lower ppm concentreation of CH4. For the DMSS a Gaussian plume triangulation algorithm has been developed, which, given a geometric model of the surrounding environment, can precisely detect and localize a CH4 leak as well as estimate its mass flow rate.
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