Energy efficient planar catalytic sensor for methane measurement

Karpov, Evgeny E.; Karpov, Evgeny F.; Сучков, А. Н.; Mironov, Sergey; Baranov, Alexander; Sleptsov, V. V.; Calliari, L.

doi:10.1016/j.sna.2013.01.057

Cited by 75 publications

(36 citation statements)

References 12 publications

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“…This change in resistivity within the sensor is the principle that can be used to measure the concentration of a gas. Lastly, catalytic sensors operate using two parts, known as beads, which are connected in a Wheatstone bridge circuit [39]. One bead has a catalytic material that is reactive to combustible gases and the other bead is not reactive because it is made of an inert material.…”

Section: Sensors For Trace Gasesmentioning

confidence: 99%

Unmanned Aerial Systems for Monitoring Trace Tropospheric Gases

Schuyler

Guzmán

2017

Atmosphere

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Abstract:The emission of greenhouse gases (GHGs) has changed the composition of the atmosphere during the Anthropocene. Accurately documenting the sources and magnitude of GHGs emission is an important undertaking for discriminating the contributions of different processes to radiative forcing. Currently there is no mobile platform that is able to quantify trace gases at altitudes <100 m above ground level that can achieve spatiotemporal resolution on the order of meters and seconds. Unmanned aerial systems (UASs) can be deployed on-site in minutes and can support the payloads necessary to quantify trace gases. Therefore, current efforts combine the use of UASs available on the civilian market with inexpensively designed analytical systems for monitoring atmospheric trace gases. In this context, this perspective introduces the most relevant classes of UASs available and evaluates their suitability to operate three kinds of detectors for atmospheric trace gases. The three subsets of UASs discussed are: (1) micro aerial vehicles (MAVs); (2) vertical take-off and landing (VTOL); and, (3) low-altitude short endurance (LASE) systems. The trace gas detectors evaluated are first the vertical cavity surface emitting laser (VCSEL), which is an infrared laser-absorption technique; second two types of metal-oxide semiconductor sensors; and, third a modified catalytic type sensor. UASs with wingspans under 3 m that can carry up to 5 kg a few hundred meters high for at least 30 min provide the best cost and convenience compromise for sensors deployment. Future efforts should be focused on the calibration and validation of lightweight analytical systems mounted on UASs for quantifying trace atmospheric gases. In conclusion, UASs offer new and exciting opportunities to study atmospheric composition and its effect on weather patterns and climate change.

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Section: Sensors For Trace Gasesmentioning

confidence: 99%

Unmanned Aerial Systems for Monitoring Trace Tropospheric Gases

Schuyler

Guzmán

2017

Atmosphere

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“…[1][2][3] While structurally similar to graphite and graphene, h-BN has a distinct set of complementary and, in many cases, advantageous properties compared to its and environmental protection. Research efforts have focused on porous alumina supports, [29][30][31] which suffer from low thermal conductivity, and thin fi lms of catalytic metals, [ 30,[32][33][34] which have low active surface area. Boron nitride aerogel offers enhanced thermal conductivity compared to alumina, and a high surface area for increased nanoparticle loading in a constrained volume of the microfabricated sensor.…”

Section: Introductionmentioning

confidence: 99%

Platinum Nanoparticle Loading of Boron Nitride Aerogel and Its Use as a Novel Material for Low‐Power Catalytic Gas Sensing

Harley‐Trochimczyk

Pham

Chang

et al. 2015

Adv Funct Materials

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A high‐surface‐area, highly crystalline boron nitride aerogel synthesized with nonhazardous reactants has been loaded with crystalline platinum nanoparticles to form a novel nanomaterial that exhibits many advantages for use in a catalytic gas sensing application. The platinum nanoparticle‐loaded boron nitride aerogel integrated onto a microheater platform allows for calorimetric propane detection. The boron nitride aerogel exhibits thermal stability up to 900 °C and supports disperse platinum nanoparticles, with no sintering observed after 24 h of high‐temperature testing. The high thermal conductivity and low density of the boron nitride aerogel result in an order of magnitude faster response and recovery times (<2 s) than reported on alumina support and allow for 10% duty cycling of the microheater with no loss in sensitivity. The resulting 1.5 mW sensor power consumption is two orders of magnitude less than commercially available catalytic gas sensors and unlocks the potential for wireless, battery‐powered catalytic gas sensing.

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“…The incident angle of L 1 is greater than that of L 1 ′ in the profile view. According to (2) and (3), the optical path difference in the refracting prism is compensated when the incident light traverses back. Therefore, the optical path difference in the refracting prism is 0 regardless of the incident angle.…”

Section: Light Propagation and Adjustment Of Interference Fringesmentioning

confidence: 99%

“…Catalytic combustion methane sensor uses the resistance of the detection element to reflect the heat that is produced by the oxidation-reduction reaction [2,3]. The thermal conductivity methane sensor makes use of the difference in thermal conductivity between methane and air to obtain the electrical signals [4,5].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of an Effective Light Interference Methane Sensor Based on Three-Dimensional Optical Path Model

Long

Yang

et al. 2018

Journal of Sensors

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As an important environmental monitoring equipment, the existing methane sensors or the traditional interferometer-based methane detectors have some drawbacks, such as low accuracy, large size, and complex calibration operations. Moreover, the optical path model and analysis method for the light interference methane sensor are not practical. In this paper, an effective light interference methane sensor is proposed based on a three-dimensional optical path model with point light source. Based on this model, the interference optical system is studied to illustrate the cause of the interference fringes. Furthermore, the influencing factors of the light intensity distribution are analyzed and an adjustment method for the interference fringes is proposed, which helps to simplify the assembling and calibrating operations. In order to improve the measurement accuracy, a temperature drift compensation method which includes a mapping table, a steady-state compensator, and a dynamic compensator is proposed. The mapping table is established between the output voltages of photoelectric detector, and the methane concentration, the steady-state compensator, and the dynamic compensator are proposed to eliminate the temperature drift. Finally, an experimental device for the light interference methane sensor is constructed to validate the interference fringe adjustment method and the temperature drift compensation method.

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Energy efficient planar catalytic sensor for methane measurement

Cited by 75 publications

References 12 publications

Unmanned Aerial Systems for Monitoring Trace Tropospheric Gases

Unmanned Aerial Systems for Monitoring Trace Tropospheric Gases

Platinum Nanoparticle Loading of Boron Nitride Aerogel and Its Use as a Novel Material for Low‐Power Catalytic Gas Sensing

Analysis and Design of an Effective Light Interference Methane Sensor Based on Three-Dimensional Optical Path Model

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