Utilization and Mitigation of VAM/CMM Emissions by a Catalytic Combustion Gas Turbine

Tanaka, Kenichiro; Yoshino, Yūji; Kashihara, Hiroyuki; Kajita, S.

doi:10.1007/978-3-642-30445-3_56

Cited by 2 publications

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“…One of the major sources of fugitive methane is the dilute methane emitted from coal mine ventilation shafts, known as mine ventilation air (MVA). MVA is most difficult to use as an energy source as the air volume is large and the methane resource is dilute and variable in concentration, generally less than 1.0 vol % methane (typically around 0.3–0.5 vol %). , There is a clear need for enriching methane from low levels up to requirements of lean-burn methane utilization technologies (e.g., 1.0 vol % CH 4 for CSIRO system, 1.6 vol % CH 4 for the carburetted gas turbine system, and 2.0 vol % CH 4 for the Kawasaki turbine system).…”

Section: Introductionmentioning

confidence: 99%

Phase Equilibria and Methane Enrichment of Clathrate Hydrates of Mine Ventilation Air + Tetrabutylphosphonium Bromide

Wang

2014

Ind. Eng. Chem. Res.

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This paper reports the experimentally measured phase equilibrium conditions for the clathrate hydrates formed from simulated mine ventilation air (0.50 vol% CH 4 + 99.50 vol% air) in the presence of 0, 5, 20, 37.1 and 50 wt% of Tetrabutylphosphonium Bromide (TBPB).These equilibrium conditions were measured at the temperature range of (281.62 to 292.49) K and pressure range of (1.92 to 18.55) MPa by using an isochoric equilibrium step-heating pressure search method. The results showed that addition of TBPB allowed the hydrate dissociation condition for mine ventilation air to become milder and at a given temperature, the lowest hydrate dissociation pressure was achieved at 37.1 wt% TBPB, corresponding to the stoichiometric composition for TBPB·32H 2 O. For each TBPB concentration tested, the semilogarithmic plots of hydrate dissociation pressure versus reciprocal absolute temperature can be satisfactorily fitted to two straight lines intersecting at 6.5 MPa. The slopes of these fitted straight lines are indifferent to changes in TBPB concentration. Gas composition analysis by gas chromatography also found that in the presence of 37.1 wt% TBPB, CH 4 could be enriched approximately 3.5-fold in the hydrate phase.

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Section: Introductionmentioning

confidence: 99%

Phase Equilibria and Methane Enrichment of Clathrate Hydrates of Mine Ventilation Air + Tetrabutylphosphonium Bromide

Wang

2014

Ind. Eng. Chem. Res.

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“…There is a catalytic combustion gas turbine system that operates on VAM supplemented by CMM, to produce a methane concentration approximately 2% [139]. The system is comprised of an electrical generator that uses the VAM, supplemented by CMM as fuel, and a VAM oxidation unit.…”

Section: Primary Fuel Systems For Vam Mitigationmentioning

confidence: 99%

The combustion mitigation of methane as a non-CO 2 greenhouse gas

Jiang

Mira

Cluff

2018

Progress in Energy and Combustion Science

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ABSTRACT:Anthropogenic emissions of non-CO 2 greenhouse gases such as fugitive methane contribute significantly to global warming. A review of fugitive methane combustion mitigation and utilisation technologies, which are primarily aimed at methane emissions from coal mining activities, with a focus on modelling and simulation of ultra-lean methane oxidation/combustion is presented. The challenges associated with ultra-lean methane oxidation are on the ignition of the ultra-lean mixture and sustainability of the combustion process. There is a lack of fundamental studies on chemical kinetics of ultra-lean methane combustion and reliable kinetic schemes that can be used together with computational fluid dynamics studies to design and develop advanced mitigation systems. Mitigation of methane as a greenhouse gas calls for more efforts on understanding ultra-lean combustion. Recuperative combustion provides a promising means for mitigating ultra-lean methane emissions. Progress is needed on effective methods to ignite and to recuperate and retain heat for oxidation/combustion of the ultra-lean mixtures. Catalysts can be very effective in reducing the temperatures required for oxidation while plasmas may be utilised to assist the ignition, but thermodynamic/aerodynamic limits of burning ultra-lean methane remain unexplored. Further technological developments may be focussed on developing innovative capturing technology as well as technological innovations to achieve effective ignition and sustainable oxidation/combustion.

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Utilization and Mitigation of VAM/CMM Emissions by a Catalytic Combustion Gas Turbine

Cited by 2 publications

References 0 publications

Phase Equilibria and Methane Enrichment of Clathrate Hydrates of Mine Ventilation Air + Tetrabutylphosphonium Bromide

Phase Equilibria and Methane Enrichment of Clathrate Hydrates of Mine Ventilation Air + Tetrabutylphosphonium Bromide

The combustion mitigation of methane as a non-CO 2 greenhouse gas

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