Low-cost gas sensing system for the reliable and precise measurement of methane, carbon dioxide and hydrogen sulfide in natural gas and biomethane

Knobelspies, Stefan; Bierer, Benedikt; Pérez, A.; Wöllenstein, Jürgen; Kneer, Janosch; Palzer, Stefan

doi:10.1016/j.snb.2016.03.022

Cited by 26 publications

(22 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results presented here do concur to a considerable degree with the readings from a state of the art gas measurement device. The main deviation occurs in the methane channel reading and the timing coincides with extraordinary high concentrations of H 2 S. Cross‐sensitivities towards this latter gas can be ruled out due to the working principle of the photoacoustic sensor setup employed . Likewise, mechanical instabilities are unlikely the cause of this since the adjacent CO 2 channel does not suffer at all.…”

Section: Resultsmentioning

confidence: 96%

“…Modulation of the light source leads to the exiting soundwave whose amplitude is related to the amount of target gas in the measurement channel. About a decade ago, the first attempt to miniaturize this simple concept did use a micro-electro-mechanical system pressure sensor to gauge the light intensity of a thermal emitter [22], and since then different combinations of various types of broad band light sources and devices for determining the photoacoustic signal have been developed [23][24][25][26][27][28][29][30][31]. While the use of lasers in combination with acoustic resonators in setups of direct photoacoustic spectroscopy allow for ultra-sensitive trace gas detection, the use of such devices outside the laboratory is challenging [32][33][34][35][36].…”

Section: Practical Applicationmentioning

confidence: 99%

See 1 more Smart Citation

Investigating flexible feeding effects on the biogas quality in full‐scale anaerobic digestion by high resolution, photoacoustic‐based NDIR sensing

Bierer

Kress

Nägele

et al. 2019

Engineering in Life Sciences

Self Cite

View full text Add to dashboard Cite

In future energy systems based on renewable energies, biogas plants can make a significant contribution to stabilizing the electricity grids. However, this requires load‐flexible and demand‐oriented electricity production by means of flexible feed management. However, these flexible feeding strategies using greatly oscillating, temporally varying high mass loads may lead to critical process failures of the anaerobic digestion process. Currently there is no online, high resolution gas quality measurement technique to detect and prevent biological process failures available. In this contribution, we present a miniaturized, low‐cost biogas quality measurement system providing data with high precision and high temporal resolution to overcome this technology gap. To highlight the capabilities of the system we have installed it using a bypass to the main biogas duct after hydrogen sulfide removal at a full‐scale research biogas plant. During a three‐month field trial, the effect of flexible feeding on the biogas quality has been monitored. The results demonstrate long‐term stability of the sensor solution and reveal the effects of changing feeding frequency and composition on gas quantity and quality, which cannot be detected with commercially available state‐of‐the‐art sensing systems.

show abstract

Section: Resultsmentioning

confidence: 96%

Section: Practical Applicationmentioning

confidence: 99%

Investigating flexible feeding effects on the biogas quality in full‐scale anaerobic digestion by high resolution, photoacoustic‐based NDIR sensing

Bierer

Kress

Nägele

et al. 2019

Engineering in Life Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…The thermal modulation scheme to determine the H2S concentration has been demonstrated in [16] and is used here. The protocol allows for determining the hydrogen sulfide concentration in the range between 100 ppb and 20 ppm, i.e., over more than two orders of magnitude [9].…”

Section: Methodsmentioning

confidence: 99%

Low-Power Odor-Sensing Network Based on Wake-Up Nodes

Pérez

Bierer

Dinc

et al. 2017

Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

Self Cite

View full text Add to dashboard Cite

Abstract:The localization of bad odors is a long standing issue with high relevance for affected people because of the health and safety implications. In order to enable the detection and localization of bad odors we propose a wireless, low-power consuming sensor network. The sensor nodes are designed to wake-up upon initial detection of a bad odor to then start to measure the strength of the odor. Taking into account the spatial variation of the bad odor as well as environmental parameters the odor source may be identified. After the odor vanishes the sensor nodes return to sleep mode.

show abstract

“…In one approach, 3 µL of a 1 mg/mL graphene oxide solution was spin-coated on silicon fingers of 3 µm width. The graphene resistive sensor's response in the concentration range of 0-1500 ppm was measured [49][50][51][52]. Figure 16B provides the resistance response with carbon dioxide concentration at ppm levels.…”

Section: Carbon Dioxide Sensorsmentioning

confidence: 99%

Greenhouse Gas Sensors Fabricated with New Materials for Climatic Usage: A Review

Santhanam

Ahamed

2018

ChemEngineering

View full text Add to dashboard Cite

With the increasing utilization of fossil fuels in today’s technological world, the atmosphere’s concentration of greenhouse gases is increasing and needs to be controlled. In order to achieve this goal, it is imperative to have sensors that can provide data on the greenhouse gases in the environment. The recent literature contains a few publications that detail the use of new methods and materials for sensing these gases. The first part of this review is focused on the possible effects of greenhouse gases in the atmosphere, and the second part surveys the developments of sensors for greenhouse gases with coverage on carbon nano-materials and composites directed towards sensing gases like CO2, CH4, and NOx. With carbon dioxide measurements, due consideration is given to the dissolved carbon dioxide gas in water (moisture). The density functional calculations project that Pd-doped single-walled carbon nanotubes are ideal for the development of NOx sensors. The current trend is to make sensors using 3D printing or inkjet printing in order to allow for the achievement of ppb levels of sensitivity that have not been realized before. This review is to elaborate on the need for the development of greenhouse gas sensors for climatic usage by using selected examples.

show abstract

Low-cost gas sensing system for the reliable and precise measurement of methane, carbon dioxide and hydrogen sulfide in natural gas and biomethane

Cited by 26 publications

References 22 publications

Investigating flexible feeding effects on the biogas quality in full‐scale anaerobic digestion by high resolution, photoacoustic‐based NDIR sensing

Investigating flexible feeding effects on the biogas quality in full‐scale anaerobic digestion by high resolution, photoacoustic‐based NDIR sensing

Low-Power Odor-Sensing Network Based on Wake-Up Nodes

Greenhouse Gas Sensors Fabricated with New Materials for Climatic Usage: A Review

Contact Info

Product

Resources

About