Nitrogen injection to flush coal seam gas out of coal: an experimental study

• Autorzy: Zhang L. , Aziz N. , Ren T. , Nemcik J. , Tu S.

Identyfikatory

DOI

10.1515/amsc-2015-0067

Warianty tytułu

PL

Wprowadzanie azotu do złóż węgla w celu wypłukiwania gazów z pokładu – badania eksperymentalne

• Języki publikacji: EN

Abstrakty

EN

Several mines operating in the Bulli seam of the Sydney Basin in NSW, Australia are experiencing difficulties in reducing gas content within the available drainage lead time in various sections of the coal deposit. Increased density of drainage boreholes has proven to be ineffective, particularly in sections of the coal seam rich in CO2. Plus with the increasing worldwide concern on green house gas reduction and clean energy utilisation, significant attention is paid to develop a more practical and economical method of enhancing the gas recovery from coal seams. A technology based on N2 injection was proposed to flush the Coal Seam Gas (CSG) out of coal and enhance the gas drainage process. In this study, laboratory tests on CO2 and CH4 gas recovery from coal by N2 injection are described and results show that N2 flushing has a significant impact on the CO2 and CH4 desorption and removal from coal. During the flushing stage, it was found that N2 flushing plays a more effective role in reducing adsorbed CH4 than CO2. Comparatively, during the desorption stage, the study shows gas desorption after N2 flushing plays a more effective role in reducing adsorbed CO2 than CH4.

PL

W kilku kopalniach eksploatujących złoże Bulli w zagłębiu węglowym Sydney w Nowej Południowej Walii w Australii pojawił się problem redukcji zawartości gazu kopalnianego w złożach zawartego w różnych częściach złoża, w określonym czasie. Zwiększenie gęstości wykonywania odwiertów drenażowych okazało się być metodą nieskuteczną, zwłaszcza w częściach złoża bogatego w CO2. Inne kwestie to wzrastająca w świecie świadomość konieczności redukcji gazów cieplarnianych i wykorzystania czystej energii, stąd też podejmowane wysiłki na rzecz opracowania praktycznych i ekonomicznych metod odzyskiwania gazu ze złóż węgla. W pracy przedstawiono technologię opartą na wprowadzaniu azotu do złoża w celu wypłukania gazu zawartego w węglu, poprawiając skuteczność ich odzyskiwania. W prowadzonych pracach badano skuteczność odzysku CO2 i metanu ze złoża węgla po wprowadzeniu do niego azotu. Wyniki badań wskazują, że wypłukiwanie azotem w poważnym stopniu wpływa na proces desorpcji CO2 i CH4 i ich usuwania z węgla. Na etapie wprowadzania azotu, stwierdzono że wypłukiwanie azotem w większym stopniu wspomaga usuwanie adsorbowanego CH4 niż CO2. Dla porównania, w trakcie desorpcji, wykazano, że desorpcja gazów po wprowadzeniu do złoża azotu znacznie skuteczniej redukuje ilość adsorbowanego CO2 niż CH4

Słowa kluczowe

EN

N2 injection; coal seam gas; coal; gas composition; gas volume

PL

wprowadzanie azotu do złoża; gaz zawarty w węglu; węgiel; skład gazu; objętość gazu

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2015
• Tom: Vol. 60, no. 4
• Strony: 1013--1028
• Opis fizyczny: Bibliogr. 24 poz., rys., tab., wykr.

Twórcy

autor

Zhang L.

• School of Mines, China University of Mining and Technology, Xuzhou City, Jiangsu 221116, China., Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, Xuzhou 221116, China

autor

Aziz N.

• School of Civil, Mining & Environmental Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Nsw 2522, Australia

autor

Ren T.

• School of Civil, Mining & Environmental Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Nsw 2522, Australia

autor

Nemcik J.

• School of Civil, Mining & Environmental Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Nsw 2522, Australia

autor

Tu S.

• School of Mines, China University of Mining and Technology, Xuzhou City, Jiangsu 221116, China., Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, Xuzhou 221116, China

Bibliografia

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• [21] Zhang L., Aziz N., Ren T., Nemcik J., Tu S., 2014a. Influence of coal particle size on coal adsorption and desorption characteristics. Archives of Mining Sciences, Vol. 59, No. 3, p. 807-820.
• [22] Zhang L., Ren T., Aziz N., 2014b. Influences of temperature and moisture on coal sorption characteristics of a bituminous coal from the Sydney Basin, Australia. International Journal of Oil, Gas and Coal Technology, Vol. 8, No. 1, p. 62-78.
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