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Research Article | 13-December-2017

HIGH SENSITIVITY METHANE SENSOR BY CHEMICALLY DEPOSITED NANOCRYSTALLINE ZNO THIN FILM

Nanocrystalline n-ZnO thin films were deposited on SiO2-coated (0.45 μm) p type Si substrates (10-20Ω-cm) by a low cost chemical deposition technique to fabricate ZnO-based resistive sensors for methane detection. The nanocrystalline ZnO needle like structures were grown on RCA cleaned p-Si substrates by successive immersion (100-200 times) into a Sodium Zincate bath (0.125M) kept at room temperature and DI water maintained at 90 oC . The Sodium Zincate was prepared by reacting Zinc Sulphate

Sunipa Roy, H. Saha, C. K. Sarkar

International Journal on Smart Sensing and Intelligent Systems, Volume 3 , ISSUE 4, 605–620

Research Article | 12-December-2017

The Effect of Catalytic Metal Contact on Methane Sensing Performance of Nanoporous ZnO -Si Heterojunction

A sol-gel derived ZnO-p-Si heterojunction structure were fabricated and investigated as a potential methane sensor. Three configurations with different contacts (Pd-Ag contact both on ZnO and Si / Pd-Ag on ZnO side and Au on Si / and Au on both sides of the junction) were fabricated in order to study the impact of the catalytic contact on the methane sensing properties. Structural characterization with high resolution FESEM and EDX study revealed the synthesis of highly crystalline ZnO thin

G. P. Mishra, A. Sengupta, S. Maji, S. K. Sarkar, P. Bhattacharyya

International Journal on Smart Sensing and Intelligent Systems, Volume 3 , ISSUE 2, 273–291

Article | 25-November-2017

THE INFLUENCE OF SELECTED GASEOUS FUELS ON THE COMBUSTION PROCESS IN THE SI ENGINE

Summary. This paper presents the results of SI engine tests, carried out for different gaseous fuels. The analysis carried out made it possible to define the correlation between fuel composition and engine operating parameters. The tests covered various gaseous mixtures: methane with hydrogen from 5% to 50% by volume and LPG with DME from 5% to 26% by mass. The first group, considered as low-carbon-content fuels can be characterized by low CO2 emissions. Flammability of hydrogen added in those

Marek FLEKIEWICZ, Grzegorz KUBICA

Transport Problems, Volume 12 , ISSUE 3, 135–146

research-article | 23-April-2019

SELECTED ASPECTS OF THE USE OF GASEOUS FUELS BLENDS TO IMPROVE EFFICIENCY AND EMISSION OF SI ENGINE

tests consisted of eight methane/hydrogen blends, with various hydrogen shares (by volume): 0% (pure methane), 5%, 10%, 15%, 20%, 30%, 40%, and 50%. On the basis of hydrogen properties (Table 2), it can be noticed that hydrogen burns at the air–fuel ratio of 9, whereas methane and gasoline are capable of burning at the air–fuel ratios no lower than 1.9 and 1.4, respectively. Hydrogen density of 0.0838 kg/m3 (at normal temperature and pressure) volumetric low heating value equals 10.046 kJ/m3, and it

Grzegorz KUBICA, Marek FLEKIEWICZ, Paweł MARZEC

Transport Problems, Volume 14 , ISSUE 1, 95–103

Research Article | 13-December-2017

Nanocrystalline ZnO based MEMS Gas Sensors with CMOS ASIC for Mining Applications

In this paper a nanocrystalline (nc) zinc oxide based hybrid gas sensor with signal conditioning ASIC has been reported for sensing and transmitting the information about methane concentration from the underground coalmine environment. A low power, low temperature nc zinc oxide MEMS based gas sensor has been designed, fabricated and tested for the purpose with a power consumption of ~70mW and sensitivity of 76.6 % at 1.0% methane concentration at a sensor operating temperature of 1500C. For

N.P Futane, P. Bhattacharyya, S. Barma, C. Roychaudhuri, H. Saha

International Journal on Smart Sensing and Intelligent Systems, Volume 1 , ISSUE 2, 430–442

Article | 30-November-2018

POLY-3-HYDROXYBUTYRATE AS AN EXAMPLE OF A BIOPOLYMER PRODUCED BY METHANOTROPHIC BACTERIA

being particularly valuable objects of studies. Methanotrophs are Gram-negative bacteria, which use methane as the main source of carbon and energy in their life cycle. These belong to the Proteobacteria family and are classed as methylotrophs [27, 32, 33]. The main characteristic feature of methanotrophs is the ability to oxidise methane to methanol. This reaction is catalysed by a specific methane-monooxygenase (MMO) enzyme. Monooxygenase oxidises methane to methanol, and the role of MMO in this

Adam Kubaczyński, Anna Pytlak, Zofia Stępniewska

Postępy Mikrobiologii - Advancements of Microbiology, Volume 58 , ISSUE 3, 329–338

Research Article | 13-December-2017

Microcontroller based Power Efficient Signal Conditioning Unit for Detection of a Single Gas using MEMS based Sensor

power management chip) is ~ 36mW in the ON state and only ~7.2μW in OFF state (sleep mode). The test gas in this particular case was methane for which sensor resistance varied from 100KΩ to 10KΩ. This hybrid sensor system is very much suitable for detecting a single gas with display of corresponding gas concentrations and subsequent alarming if the threshold limit is crossed.

P. Bhattacharyya, D. Verma, D. Banerjee

International Journal on Smart Sensing and Intelligent Systems, Volume 3 , ISSUE 4, 771–782

research-article | 08-April-2020

EVALUATION OF THE ECOLOGICAL EFFECT OF BIODEGRADABLE WASTE PROCESSING IN A COMPREHENSIVE MUNICIPAL WASTE MANAGEMENT SYSTEM

such a function in a given plant or in the economy in general. Recycling, including organic recycling but not including energy recovery and reprocessing into materials to be used as fuels or for backfilling operations, is also one form of recovery. Among the organic recycling methods, it stands out: – methane fermentation – anaerobic process of decomposition (mineralization) of complex macromolecular organic substances contained in biomass, leading to stabilization of biomass properties [10–15

Agnieszka GENEROWICZ

Architecture, Civil Engineering, Environment, Volume 13 , ISSUE 1, 121–128

Article | 09-August-2018

USE OF BIOLOGICAL METHODS FOR REMOVAL OF H2S FROM BIOGAS IN WASTEWATER TREATMENT PLANTS – A REVIEW

Biogas is produced during anaerobic digestion of organic substances by a consortium of microorganisms. Biogas consists mainly of methane (CH4 ) and carbon dioxide (CO2). Other gases such as dinitrogen (N2), water vapour (H2 O), ammonia (NH3), hydrogen sulfide (H2S) and other sulfur compounds could also be found therein. Biogas produced by waste biomass has been recognized as one of the most important alternative energy sources in the recent years. In order to be used as a source of energy to

Krzysztof Barbusiński, Katarzyna Kalemba

Architecture, Civil Engineering, Environment, Volume 9 , ISSUE 1, 103–112

Article | 10-June-2019

ENDOPHYTIC BACTERIA IN THE PHYTODEGRADATION OF PERSISTENT ORGANIC POLLUTANTS

with TNT. For the first time, these studies demonstrated that the endophytic bacterium Stenotrophomonas chelatiphagus isolated from the leaves and Variovorax ginsengisola strain isolated from the sycamore maple leaf can transform TNT into hydroxylamine and amino dinitrotoluene. Currently, many studies focus on the possibility of using endophytic methanotrophs in the bioremediation of greenhouse gases, in particular methane and carbon dioxide. These bacteria contribute to the efficient capture of

Daria Chlebek, Katarzyna Hupert-Kocurek

Postępy Mikrobiologii - Advancements of Microbiology, Volume 58 , ISSUE 1, 70–79

Review | 06-August-2019

ENERGY EFFICIENCY ECONOMICS OF CONVERSION OF BIOGAS FROM THE FERMENTATION OF SEWAGE SLUDGE TO BIOMETHANE AS A FUEL FOR AUTOMOTIVE VEHICLES

in order to increase its energy value. The objective underlying the selection of an appropriate treatment technology is to increase the content of methane and to eliminate substances harmful to engines such as carbon dioxide, hydrogensulphide, siloxanes or water vapor. The main advantage of using biomethane lies in its ecological value as a fuel viewed as a source of renewable energy [2, 3, 4]. The application of biomethane as engine fuel, apart from the impact of the commercial aspect following

Józef CIUŁA, Krzysztof GASKA, Łukasz ILJUCZONEK, Agnieszka GENEROWICZ, Viktor KOVAL

Architecture, Civil Engineering, Environment, Volume 12 , ISSUE 2, 131–140

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