In the course of the energy turnaround, methane produced in biogas plants can be fed into the natural gas net, provided that it is free of impurities. Thus, hydrogen or highly toxic hydrogen sulfide is only allowed to be present in very small quantities in order to protect the consumer's health or to protect him against risks of explosion.
INM – Leibniz Institute for New Materials is developing a sensor with specific properties that can reliably detect hydrogen sulfide in smallest concentrations using an optical path.
For the new sensor, the scientists at INM aim for the development of a functional layer, which does not need oxygen for the proof of hydrogen sulfide (H2S). Apart from that, the layer is supposed to enable the sensor to be responsive to hydrogen sulfide in quantities of a few hundredth of a percent at any time and respond exclusively to hydrogen sulfide within the shortest time.
For this purpose, the scientists at INM will produce a special functional layer that changes its properties in the presence of hydrogen sulfide, such as change of color, color permeation, the way of light scattering or reflection. "We will use optical analysis techniques, which are not yet obtainable on the market", says Peter William de Oliveira, head of the Program Division Optical Materials. "They will be the key issues of our new developments." The scientists expect a corresponding response of the sensor to hydrogen sulfide in the gas, even in the range of a few per mil. "With an appropriate receiver, we can easily convert these changes in a signal "too much hydrogen sulfide", says the materials scientist.
Although there are various providers of such sensors on the market at the moment, these are not suitable for the use in biogas plants for a variety of reasons. "Many of these sensors function via chemical reactions, where oxygen is needed," the chemist explains. Other sensors work via electrochemical methods or via chemiluminescence. They are either expensive or too slow or do not only indicate hydrogen sulfide but also other gases so that the quantity of H2S cannot be clearly identified.
While INM is in charge of the development of the special layer, the medium-sized companies involved are working on the corresponding electronic and technical equipment for the production of the entire system.
INM – Leibniz Institute for New Materials, situated in Saarbruecken, is an internationally leading centre for materials research. It is an institute of the Leibniz Association and has about 190 employees.
Beyond conventional solution-process for 2-D heterostructure
22.06.2018 | Science China Press
Graphene assembled film shows higher thermal conductivity than graphite film
22.06.2018 | Chalmers University of Technology
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
22.06.2018 | Materials Sciences
22.06.2018 | Earth Sciences
22.06.2018 | Life Sciences