Abstract
This paper reports a method for simultaneous determination of H2, O2, N2, CO, CO2, CH4, C2H2, C2H4, C2H6, C3H4 (propadiene and propyne), C3H6, C3H8 and C4H10 (n-butane and iso-butane) by gas chromatography using thermal conductivity and flame ionization detectors. A single porous layer open tubular column (0.53 mm internal diameter × 30 m length × 30 μm thick) was applied and no catalytic converter was needed to convert CO and CO2 into CH4 to enable identification by a flame ionization detector. The most appropriate chromatographic conditions were defined for the method and it was validated according to the recommendations of the National Health Surveillance Agency and the National Institute of Metrology, Standardization and Industrial Quality. Chromatographic conditions defined for the target gases presented satisfactory linearity (r > 0.99), and limits of detection ranged between 0.0916 and 2.75 ppm. High accuracy (98-101%) obtained for the gas chromatography/thermal conductivity detector/flame ionization detector method associated to low relative standard deviation (< 2%) confirmed its applicability in routine quantification of target gases formed during the pyrolysis of municipal refuse-derived fuel.
Highlights
Thermochemical processes constitute alternatives to minimize and convert refusederived fuel (RDF) from municipal solid waste (MSW, known as municipal refuse-derived fuel (MRDF)) into energy
A catalytic converter is needed to convert carbon monoxide (CO) and CO2 into CH4 for detection by FID under acceptable sensitivity using argon as carrier gas. Other limitations of this method are: (i) light hydrocarbons propane and propylene are not separated under the furnished conditions; A Gas Chromatography Method for Simultaneous Quantification of Inorganic Gases and Light Hydrocarbons
The concentration of each analyte was calculated considering the volume of gas in the temperature of 0 °C to facilitate the comparison with the results obtained with ASTM D3612-02.6
Summary
Thermochemical processes (pyrolysis and gasification) constitute alternatives to minimize and convert refusederived fuel (RDF) from municipal solid waste (MSW, known as municipal refuse-derived fuel (MRDF)) into energy. The composition and proportion of gases formed during thermochemical processes vary according to the type of waste, reactor, and operational conditions, such as temperature and heating rate.[3,4,5] As some of these gases may. A catalytic converter (methanizer) is needed to convert CO and CO2 into CH4 for detection by FID under acceptable sensitivity using argon as carrier gas. Other limitations of this method are: (i) light hydrocarbons propane and propylene are not separated under the furnished conditions;
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