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

Abstract

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.

Methane Mitigation: Methods to Reduce Emissions, on the Path to the Paris Agreement

“…Gosiewski and Pawlaczyk () estimate that 0.5 t of Pd would be needed to mitigate emissions from a single coal mine ventilation shaft. Unfortunately, currently, there has been little research on ultralean methane combustion using these catalysts (Jiang et al, ), though palladium‐based zeolite catalysis is possible (Petrov et al, ). More generally, the use of zeolite‐metal technologies to remove methane from air is promising (Jackson et al, ).…”

Current status, challenges, and policy suggestions for coalbed methane industry development in China: A review

“…Globally, Coalbed Methane (CBM), including coal mine methane (CMM) captured from the underground coal mining operations, is attracting growing attention mainly from the perspective of climate change caused by greenhouse gas (GHG) emission . However, China has two additional and very compelling reasons for addressing the issue—decreasing coal mining accidents and developing cleaner energy resources to improve air quality in cities…”

Characteristics of Pollutants and Microbial Communities Obtained in Simulated Lysimeters of Swine Carcasses

“…As hydrolysis progressed, leachate production increased and exceeded the water capacity of soil. Then, leachate was discharged to the outside of lysimeters and the leachate remaining in the soil was converted to methane [33][34][35]. Therefore, the TOC removed in all three lysimeters was mainly converted to mainly leachate.…”

“…The major composition of the gas are carbon dioxide and methane, which were typical greenhouse gas (GHG) that cause climate change. The global warming potential (GWP) of methane, which has radiative forcing value of 0.48 W/m 2 , is higher following carbon dioxide [33][34][35]. By addition of anaerobic sludge and increased water content, the biodegradation of livestock carcasses can be accelerated.…”