Profile of CO2, CO, and H2 Emissions from Thermal Oxidation of Polish Coals

The self-heating phenomenon of coal leads to work safety hazards in underground mining. The quantitative analysis of gaseous products in mine atmosphere constitutes one of the detection methods of advanced coal heating. The article presents the results of tests on CO, CO2, and H2 emissions during simulated heating of coal in the temperature range of 323–523 K. The oxidation of 15 Polish coals of various carbon contents was performed using a flow reactor technique. A chromatography method was applied to measure the changes of oxidation products concentrations with the increase of temperature. It has been determined that all the tested gases were generated at the initial temperature. The collected data indicated that CO2 was a major oxidation product in the entire temperature range, while the amounts of H2 produced did not exceed 0.49% volume. At the temperature of 323 K, the ratio of CO2/CO was in the range of 10–23 but along with the temperature increase the ratio range narrowed to 3–4. In this paper, a comparison of the physical-chemical properties of the tested coals and the emissions profile of the gases using, among others, the hierarchical clustering analysis showed that samples with higher oxygen, sulfur, and inertinite content as well as lower ash and carbon content formed larger amounts of fire gases.

[1]  A. Smoliński,et al.  An Assessment of the Formations and Structures Suitable for Safe CO2 Geological Storage in the Upper Silesia Coal Basin in Poland in the Context of the Regulation Relating to the CCS , 2020, Energies.

[2]  N. Wagner,et al.  Influence of organic and inorganic properties of coal-shale on spontaneous combustion liability , 2019 .

[3]  A. Smoliński,et al.  Multi-component gas mixture transport through porous structure of coal , 2018, Fuel.

[4]  M. Onifade,et al.  Spontaneous combustion of coals and coal-shales , 2018, International Journal of Mining Science and Technology.

[5]  Jun Yu Li,et al.  A lab-scale experiment on low-temperature coal oxidation in context of underground coal fires , 2018, Applied Thermal Engineering.

[6]  A. Smoliński,et al.  The interaction between coal and multi-component gas mixtures in the process of coal heating at various temperatures: An experimental study , 2018 .

[7]  A. Smoliński,et al.  Sorption characteristic of coal as regards of gas mixtures emitted in the process of the self-heating of coal , 2017 .

[8]  Tao Xu,et al.  Heat effect of the oxygen-containing functional groups in coal during spontaneous combustion processes , 2017 .

[9]  Yulong Zhang,et al.  Experimental Study on the Molecular Hydrogen Release Mechanism during Low-Temperature Oxidation of Coal , 2017 .

[10]  Adam Smoliński,et al.  Experimental study on application of high temperature reactor excess heat in the process of coal and biomass co-gasification to hydrogen-rich gas , 2015 .

[11]  Junfeng Wang,et al.  Modes and kinetics of CO2 and CO production from low-temperature oxidation of coal , 2015 .

[12]  K. Xie.  Geological Characteristics of Coal , 2015 .

[13]  K. Xie.  Structure and Reactivity of Coal , 2015 .

[14]  B. Beamish,et al.  Mutual effects of pyrite and moisture on coal self-heating rates and reaction rate data for pyrite oxidation , 2015 .

[15]  R. Flores.  Coalification, Gasification, and Gas Storage , 2014 .

[16]  R. Kaliszan,et al.  Partial least square and hierarchical clustering in ADMET modeling: prediction of blood-brain barrier permeation of α-adrenergic and imidazoline receptor ligands. , 2013, Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques.

[17]  Krzysztof Stańczyk,et al.  Chemometric Study of the Ex Situ Underground Coal Gasification Wastewater Experimental Data , 2012, Water, Air, & Soil Pollution.

[18]  S. Kizgut,et al.  Low-temperature oxidation of some Turkish coals , 2012 .

[19]  B. Beamish,et al.  Investigating the influence of reactive pyrite on coal self-heating , 2012 .

[20]  Liming Yuan,et al.  CO and CO2 emissions from spontaneous heating of coal under different ventilation rates , 2011 .

[21]  Gang Wang,et al.  Early detection of spontaneous combustion of coal in underground coal mines with development of an ethylene enriching system , 2011 .

[22]  K. Barış,et al.  Low Temperature Oxidation of a High Volatile Bituminous Turkish Coal Effects of Temperature and Particle Size , 2009 .

[23]  N. K. Mohalik,et al.  Critical Appraisal to Assess the Extent of Fire in Old Abandoned Coal Mine Areas - Indian Context , 2009 .

[24]  W. Hitchcock,et al.  A Study of the Formation of Hydrogen Produced During the Oxidation of Bulk Coal Under Laboratory Conditions , 2008 .

[25]  B. Ptaszyński.  Carbon dioxide concentration in mine workings , 2006 .

[26]  Katarzyna Zarębska,et al.  Sorption of carbon dioxide–methane mixtures , 2005 .

[27]  Glenn B. Stracher,et al.  Coal fires burning out of control around the world : Thermodynamic recipe for environmental catastrophe , 2004 .

[28]  Jinhua Sun,et al.  Experimental research on index gas of the coal spontaneous at low-temperature stage , 2004 .

[29]  Bogdan Z. Dlugogorski,et al.  Coal oxidation at low temperatures: oxygen consumption, oxidation products, reaction mechanism and kinetic modelling , 2003 .

[30]  Haihui Wang,et al.  Pathways for production of CO2 and CO in low-temperature oxidation of coal , 2003 .

[31]  Haihui Wang,et al.  Thermal decomposition of solid oxygenated complexes formed by coal oxidation at low temperatures , 2002 .

[32]  Bogdan Z. Dlugogorski,et al.  Examination of Co2, Co, and H2O formation during low-temperature oxidation of a bituminous coal , 2002 .

[33]  Vedat Didari,et al.  Relations between Coal Properties and Spontaneous Combustion Parameters , 2002 .

[34]  C. Rodrigues,et al.  The measurement of coal porosity with different gases , 2002 .

[35]  Haim Cohen,et al.  Emission of hydrogen gas from weathered steam coal piles via formaldehyde as a precursor. I. Oxidative decomposition of formaldehyde catalyzed by coal - batch reactor studies , 1999 .

[36]  Edgar Muñoz,et al.  FTIR study of the evolution of coal structure during the coalification process , 1996 .

[37]  H. Cohen,et al.  Emission of toxic and fire hazardous gases from open air coal stockpiles , 1994 .

[38]  W. Wanzl,et al.  Molecular hydrogen evolution as a consequence of atmospheric oxidation of coal: 3. Thermogravimetric flow reactor studies , 1994 .

[39]  H. Cohen,et al.  Molecular hydrogen evolution as a consequence of atmospheric oxidation of coal: 1. Batch reactor simulations , 1993 .

[40]  Donald E. Rogers,et al.  LOW TEMPERATURE OXIDATION STUDIES OF DRIED NEW ZEALAND COALS , 1991 .

[41]  John F. Unsworth,et al.  Moisture in coal: 2. Maceral effects on pore structure , 1989 .

[42]  Yukio Hishinuma,et al.  Low temperature oxidation of coals: Effects of pore structure and coal composition , 1985 .

[43]  H. Charles Romesburg,et al.  Cluster analysis for researchers , 1984 .

[44]  C. S. Yust,et al.  Transmission electron microscope observations of porosity in coal , 1976 .

[45]  R. L. Derick,et al.  Methods To Determine The Status Of Mine Atmospheres - An Overview , 1900 .