Wyniki wyszukiwania dla: GAS

• Oil and Gas Geology

  Czasopisma

  ISSN: 0253-9985

• Natural Gas Geoscience

  Czasopisma

  ISSN: 1672-1926

• Medical Gas Research

  Czasopisma

  ISSN: 2045-9912

• OIL & GAS JOURNAL

  Czasopisma

  ISSN: 0030-1388 , eISSN: 1944-9151

• Gas Science and Engineering

  Czasopisma

  ISSN: 2949-9097

• INTERNATIONAL GAS ENGINEERING AND MANAGEMENT

  Czasopisma

  ISSN: 1465-7058

• Gas Wasserfach Wasser Abwasser

  Czasopisma

  ISSN: 0016-3651

• Natural Gas Industry B

  Czasopisma

  ISSN: 2352-8540

• OIL GAS-EUROPEAN MAGAZINE

  Czasopisma

  ISSN: 0342-5622

• Journal of Natural Gas Chemistry

  Czasopisma

  ISSN: 1003-9953

• Improved Oil and Gas Recovery

  Czasopisma

  eISSN: 2688-8246

• Upstream Oil and Gas Technology

  Czasopisma

  eISSN: 2666-2604

• Hazardous gases detection by fluctuation-enhanced gas sensing

  Publikacja

  • M. Kotarski
  • J. Smulko

  - FLUCTUATION AND NOISE LETTERS - Rok 2010

  W pracy przedstawiono układ pomiarowy oraz metodę za pomocą której można jednym rezystancyjnym czujnikiem gazów wykrywać dwa gazy: amoniak i siarkowodór. Podano wskaźnik jaki pozwala dokonać detekcji tych gazów już przy stężeniach rzędu pojedynczych ppm. Przebadano także powtarzalność wyników pomiarów w kilku egzemplarzach czujników.

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• Efficiency of gas mixtures detection by resistive gas sensors

  Publikacja

  • J. Smulko
  • M. Kotarski

  - Rok 2014

  Resistive gas sensors are very popular and are commonly used to detect various gases and their mixtures. Theeir main disadvantage is very limited selectivity. Practical use of gas sensors in environenmental applications requires determination of concentration of a few mixed gases at the same time. We would like to present recent results of gas detection improvement by utilizing a single gas sensor and additional measurements to...

• EFFICIENCY OF GAS MIXTURES DETECTION BY RESISTIVE GAS SENSORS

  Publikacja

  • J. Smulko
  • M. Kotarski

  - Rok 2014

  Resistive gas sensors are very popular and are commonly used to detect various gases and their mixtures. Their main disadvantage is very limited selectivity. Practical use of gas sensors in environmental applications (e.g., in sewage systems to protect workers, in air conditioning systems to monitor atmosphere quality) requires determination of concentration of a few mixed gases at the same time. We would like to present recent...

• Selectivity of amperometric gas sensors in multicomponent gas mixtures

  Publikacja

  • M. Dmitrzak
  • G. Jasiński
  • P. Jasiński

  - Rok 2019

  In recent years smog and poor air quality became a growing environmental problem. There is a need to continuously monitor the quality of air. The lack of selectivity is one of the most important problems limiting the use of gas sensors for this purpose. In this study, a selectivity of the six amperometric gas sensors is being investigated. Calibration of sensors has been performed in order to find a correlation between concentration...

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• Gas sampling system for matrix of semiconductor gas sensors

  Publikacja

  • G. Jasiński
  • A. Strzelczyk
  • P. A. Kościński

  - IOP Conference Series: Materials Science and Engineering - Rok 2016

  Semiconductor gas sensors are popular commercial sensors applied in numerous gas detection systems. They are reliable, small, rugged and inexpensive. However, there are a few problem limiting the wider use of such sensors. Semiconductor gas sensor usually exhibits a low selectivity, low repeatability, drift of response, strong temperature and moisture influence on sensor properties. Sample flow rate is one of the parameters that...

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• Problems of gas detection by resistance fluctuations in gas sensors

  Publikacja

  • J. Smulko

  - Rok 2005

  Przedstawiono problemy budowy dystrybutora gazów oraz próbek zapachowych do badań sensorów gazu. Podano układ elektroniczny wykorzystywany do rejestracji fluktuacji rezystancji obserwowany w czujnikach gazu. Załączono przykładowe wyniki obserwacji sygnałów losowych.

• A Comparison of Ammonia Emission Factors from Light-Duty Vehicles Operating on Gasoline, Liquefied Petroleum Gas (LPG) and Compressed Natural Gas (CNG)

  Publikacja

  • P. Bielaczyc
  • A. Szczotka
  • A. Swiatek
  • J. Woodburn

  - SAE International Journal of Fuels and Lubricants - Rok 2012

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• Application of Thermo-chemical Technologies for Conversion of Associated Gas in Diesel-Gas Turbine Installations for Oil and Gas Floating Units

  Publikacja

  • O. Cherednichenko
  • S. Serbin
  • M. Dzida

  - Polish Maritime Research - Rok 2019

  The paper considers the issue of thermo-chemical recovery of engine’s waste heat and its further use for steam conversion of the associated gas for oil and gas floating units. The characteristics of the associated gas are presented, and problems of its application in dual-fuel medium-speed internal combustion engines are discussed. Various variants of combined diesel-gas turbine power plant with thermo-chemical heat recovery are...

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• On Accuracy Modeling of Gas Turbine Cycles by the In-house COM-GAS Code

  Publikacja

  • P. Ziółkowski
  • J. Topolski
  • T. Kowalczyk
  • J. Badur

  - Rok 2016

  In this paper, a comparison of accuracy modeling of gas turbine cycles between the basic (classical) model and the in-house COM-GAS code has been presented. The basic model uses a semi-perfect gas and well known projecting assumption. On the other hand, the computational flow mechanics (CFM) basis on a real gas by using thermodynamic tables. The thermodynamic analysis of thermal cycles, simply gas cycle GT8C and gas turbine cycle...

• Gas selectivity enhancement by sampling-and-hold method in resistive gas sensors

  Publikacja

  • J. Smulko
  • M. Trawka

  - SENSORS AND ACTUATORS B-CHEMICAL - Rok 2015

  Commercial resistive gas sensors exhibit various sensitivity to numerous gases when working at different elevated temperatures. That effect is due to a change in velocity of adsorption and desorption processes which can be modulated by temperature. Thus, to reach better selectivity of gas detection, we propose to apply a known method (called the sampling-and-hold method) of cooling down the gas sensor in the presence of the investigated...

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• SAMPLE-AND-HOLDING METHOD FOR GAS SENSING APPLIED FOR RESISTANCE GAS SENSORS

  Publikacja

  • M. Trawka
  • J. Smulko
  • L. Hasse

  - Rok 2014

  The DC resistance of a Taguchi gas sensor is influenced by the ambient gas. To improve the selectivity and sensitivity of a sensor the fluctuation enhanced sensing (FES) was used. The paper proposes a novel methodology of utilizing FES technique that sample composition of an ambient atmosphere and hold it for further processing (sample-and-holding technique). The method uses the heated gas sensor to sample an ambient atmosphere...

• Model of a telecommunication system for monitoring gas leaks from gas pipelines

  Publikacja

  • P. Bushmelev
  • S. Uvaysov
  • K. Bushmeleva
  • S. Uvaysova
  • R. Romaniuk
  • W. Wójcik
  • R. S. Romaniuk

  - Rok 2019

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• Journal of Unconventional Oil and Gas Resources

  Czasopisma

  ISSN: 2213-3976

• AGH Drilling, Oil, Gas Quarterly

  Czasopisma

  ISSN: 2299-4157 , eISSN: 2300-7052

• International Journal of Greenhouse Gas Control

  Czasopisma

  ISSN: 1750-5836 , eISSN: 1878-0148

• Tianranqi Gongye/Natural Gas Industry

  Czasopisma

  ISSN: 1000-0976

• GRAPHENE IN GAS CHEMIRESISTORS

  Publikacja

  • A. M. Frymark
  • P. Jasiński

  - Rok 2013

  Graphene has a range of unique physical properties which could be exploited in gas sensing. Every atom of graphene may be considered as a surface atom, able to interact even with single molecule of the target gas or vapour species resulting in the ultrasensitive sensor response. In this paper the potential of graphene as a nanomaterial for fabricating chemiresistors was described. Recent development in graphene sensors was considered...

• Standard gas mixtures- indispensable reference materials in the analysis of gaseous media

  Publikacja

  • M. Słomińska
  • P. Konieczka
  • J. Namieśnik

  - TRAC-TRENDS IN ANALYTICAL CHEMISTRY - Rok 2010

  In recent years the need for the quality control and assurance of analytical measurement results has been particularly strongly emphasised. Certified reference materials play an invaluable role in this process. The article characterises the basic types of reference materials, focusing in particular on those in the gaseous state. It also reviews the literature on the techniques of preparing standard gas mixtures over the last ten...

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• Standard gas mixtures- indispensable reference materials in the analysis of gaseous media

  Publikacja

  • M. Słomińska
  • P. Konieczka
  • J. Namieśnik

  - TRAC-TRENDS IN ANALYTICAL CHEMISTRY - Rok 2010

  In recent years the need for the quality control and assurance of analytical measurement results has been particularly strongly emphasised. Certified reference materials play an invaluable role in this process. The article characterises the basic types of reference materials, focusing in particular on those in the gaseous state. It also reviews the literature on the techniques of preparing standard gas mixtures over the last ten...

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• Standard gas mixtures – indispensable reference materials in the analysis of gaseous media

  Publikacja

  • M. Słomińska
  • P. Konieczka
  • J. Namieśnik

  - TrAC Trends in Analytical Chemistry - Rok 2010

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• Negative carbon dioxide gas power plant integrated with gasification of sewage sludge

  Publikacja

  • P. Ziółkowski
  • K. Stasiak
  • M. Amiri
  • D. Mikielewicz

  - ENERGY - Rok 2023

  One of the primary objectives of the negative carbon dioxide gas power plant (nCO2PP) is to develop an innovative technology confirming the possibility of the use of sewage sludge to produce electricity while having a positive impact on the environment. In this paper, a mathematical model is presented to estimate thermodynamic parameters of the system in relation to the gasification process and changes in such parameters in the...

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• A New Approach to Generation of Standard Gas Mixtures used in the Calibration of Gas Analysers

  Publikacja

  • M. Prokopowicz
  • P. Konieczka
  • J. Namiesnik
  • P. Konieczka

  - ENVIRONMENTAL TECHNOLOGY - Rok 1999

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• Flicker Noise in Resistive Gas Sensors—Measurement Setups and Applications for Enhanced Gas Sensing

  Publikacja

  • J. Smulko
  • G. Scandurra
  • K. Drozdowska
  • A. Kwiatkowski
  • C. Ciofi
  • H. Wen

  - SENSORS - Rok 2024

  We discuss the implementation challenges of gas sensing systems based on low-frequency noise measurements on chemoresistive sensors. Resistance fluctuations in various gas sensing materials, in a frequency range typically up to a few kHz, can enhance gas sensing by considering its intensity and the slope of power spectral density. The issues of low-frequency noise measurements in resistive gas sensors, specifically in two-dimensional...

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• Gas Detection Using Resistive Gas Sensors And Radial Basis Function Neural Networks

  Publikacja

  • Ł. Lentka
  • J. Smulko
  • O. Gualdron
  • R. Ionescu

  - Rok 2016

  We present a use of Radial Basis Function (RBF) neural networks and Fluctuation Enhanced Sensing (FES) method in gas detection system utilizing a prototype resistive WO3 gas sensing layer with gold nanoparticles. We investigated accuracy of gas detection for three different preprocessing methods: no preprocessing, Principal Component Analysis (PCA) and wavelet transformation. Low frequency noise voltage observed in resistive gas...

• Gas mixtures recognition using an array of amperometric gas sensors with drifting or faulty sensors

  Publikacja

  • M. Dmitrzak
  • P. Kalinowski
  • P. Jasiński
  • G. Jasiński

  - Rok 2021

  In this study, the possibility of using selected methods for diagnostics of performance of matrix composed with six amperometric electrochemical gas sensors is investigated. Measurements of sensor responses in selected concentrations of single toxic gases or gas mixtures were performed and were repeated over time to show sensor drift. Additionally, the studies on the sensors’ drift were performed. The drift has been recognized...

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• Efficiency of linear and non-linear classifiers for gas identification from electrocatalytic gas sensor

  Publikacja

  • P. Kalinowski
  • Ł. Woźniak
  • A. Strzelczyk
  • P. Jasiński
  • G. Jasiński

  - Metrology and Measurement Systems - Rok 2013

  Electrocatalytic gas sensors belong to the family of electrochemical solid state sensors. Their responses are acquired in the form of I-V plots as a result of application of cyclic voltammetry technique. In order to obtain information about the type of measured gas the multivariate data analysis and pattern classification techniques can be employed. However, there is a lack of information in literature about application of such...

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• High temperature air/steam gasification of biomass in view of hydrogen rich gas production.

  Publikacja

  • J. Stąsiek
  • M. Wierzbowski
  • J. Barański
  • W. Błasiak

  - Rok 2003

  Artykuł przedstawia opis nowej i zaawansowanej metody konwersji termochemicznej biomasy i miejskich odpadów stałych w paliwo gazowe, bogate w wodór. W porównaniu z tradycyjnym procesem gazyfikacji, w metodzie tej wykorzystuje się powietrze/parę wodną przegrzane do wysokiej temperatury (powyżej 1300 st. C). Przegrzanie powietrza lub pary wodnej odbywa się z zastosowaniem ceramicznego przegrzewacza wysokotemperaturowego. W celu...

• Hydrogen rich gas production from high temperature air/steam gasification of biomass

  Publikacja

  • J. Stąsiek
  • M. Wierzbowski
  • J. Barański
  • W. Blasiak

  - Rok 2003

  W pracy przedstawiono nowoczesną technikę konwersji biomasy oraz stałych odpadów komunalnych w celu produkcji paliwa gazowego bogatego w wodór. Opisany proces gazyfikacji przebiega w wysokiej temperaturze przy obniżonej koncentracji tlenu i udziale pary wodnej. Dzięki temu możliwa jest produkcja gazów palnych, w szczególności H2, który można wykorzystać do produkcji energii elektrycznej i cieplnej.

• Sulfur compounds: Gas chromatography

  Publikacja

  • W. Wardencki

  - Rok 2014

  Sulfur compounds, due to their properties, are responsible for the damage of our environment. For this reason sulfur containing compounds are of constant concern in many fields. Gas chromatography (GC), due to combination of separation capability and sensitive detection is a prime technique for the analysis of thes compounds in various matrices. The chapter rewies general problems of the determination of these compounds by GC and...

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• Developments in Miniaturization of Gas Chromatography

  Publikacja

  • W. Wardencki
  • Z. Witkiewicz

  - Rok 2021

  .

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• Investigation of the Combustion Processes in the Gas Turbine Module of an FPSO Operating on Associated Gas Conversion Products

  Publikacja

  • O. Cherednichenko
  • S. Serbin
  • M. Dzida

  - Polish Maritime Research - Rok 2019

  In this paper, we consider the issue of thermo-chemical heat recovery of waste heat from gas turbine engines for the steam conversion of associated gas for offshore vessels. Current trends in the development of offshore infrastructure are identified, and the composition of power plants for mobile offshore drilling units and FPSO vessels is analyzed. We present the results of a comparison of power-to-volume ratio, power-to-weight...

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• Limited selectivity of amperometric gas sensors operating in multicomponent gas mixtures and methods of selectivity improvement

  Publikacja

  • M. Dmitrzak
  • P. Jasiński
  • G. Jasiński

  - Bulletin of the Polish Academy of Sciences-Technical Sciences - Rok 2020

  In recent years, smog and poor air quality have became a growing environmental problem. There is a need to continuously monitor the quality of the air. The lack of selectivity is one of the most important problems limiting the use of gas sensors for this purpose. In this study, the selectivity of six amperometric gas sensors is investigated. First, the sensors were calibrated in order to find a correlation between the concentration...

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• Energy requirements for methods improving gas detection by modulating physical properties of resistive gas sensors

  Publikacja

  • M. Trawka
  • M. Kotarski

  - Rok 2015

  Abstract. One of the most important disadvantage of resistive gas sensors is their limited gas selectivity. Therefore, various methods modulating their physical properties are used to improve gas detection. These methods are usually limited to temperature modulation or UV light irradiation for the layers exhibiting photocatalytic effect. These methods cause increased energy consumption. In our study we consider how much energy...

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• Extraction and evaluation of gas-flow-dependent features from dynamic measurements of gas sensors array

  Publikacja

  • P. Kalinowski
  • Ł. Woźniak
  • G. Jasiński
  • P. Jasiński

  - Rok 2016

  Gas analyzers based on gas sensors are the devices which enable recognition of various kinds of volatile compounds. They have continuously been developed and investigated for over three decades, however there are still limitations which slow down the implementation of those devices in many applications. For example, the main drawbacks are the lack of selectivity, sensitivity...

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• INVESTIGATION OF THE CHARACTERISTICS OF A LOWEMISSION GAS TURBINE COMBUSTION CHAMBER OPERATING ON A MIXTURE OF NATURAL GAS AND HYDROGEN

  Publikacja

  • S. Serbin
  • K. Burunsuz
  • D. Chen
  • J. Kowalski

  - Polish Maritime Research - Rok 2022

  T his article is devoted to the investigation of the characteristics of a low-emission gas turbine combustion chamber, which can be used in Floating Production, Storage and Offloading (FPSO) vessels and operates on a mixture of natural gas and hydrogen. A new approach is proposed for modelling the processes of burning out a mixture of natural gas with hydrogen under preliminary mixing conditions in gaseous fuel with an oxidizer...

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• Influence of gas parameters alteration on the form of gas-flow-impact appearing in long transportation pipelines

  Publikacja

  • W. Próchnicki
  • M. Dzida

  - Transactions of the Institute of Fluid-Flow Machinery - Rok 2003

  Przy szybkich zamknięciach przepływu w długich liniach transportowych gazu, obserwuje się znaczne przesterowania ciśnienia, towarzyszące zjawiskom udarowym, wywołane zarówno falą uderzeniową jak i odbitą. Głównym czynnikiem wpływającym na postać fali uderzeniowej i jej amplitudy, jest szybkość zamykania zaworu odcinającego określona stałą czasową serwomotoru sterującego zaworem. Ponieważ obserwuje się zmiany właściwości chemicznych...

• International Journal of Oil Gas and Coal Technology

  Czasopisma

  ISSN: 1753-3309 , eISSN: 1753-3317

• Portable exhaled breath analyzer employing fluctuation-enhanced gas sensing method in resistive gas sensors

  Publikacja

  • A. Kwiatkowski
  • T. Chludziński
  • J. Smulko

  - Metrology and Measurement Systems - Rok 2018

  This paper presents a portable exhaled breath analyser, developed to detect selected diseases. The set-up employs resistive gas sensors: commercial MEMS sensors and prototype gas sensors made of WO3 gas sensing layers doped with various metal ingredients. The set-up can modulate the gas sensors by applying UV light to induce physical changes of the gas sensing layers. The sensors are placed in a tiny gas chamber of a volume...

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