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DFT-continuum characterization of third-order elasticity of sI methane hydrates under pressure

Published in Materials Research Express

Methane gas hydrates (GHs) are polyhedral crystalline guest-host materials found under high pressure and low-temperature conditions, which can serve as an energy source. Previous work on methane GH material physics was limited to simple linear models, which only involves second-order elasticity. However, this is not fully suited to high-stress load...

Impact of different structures of biochar on decreasing methane emissions from sewage sludge composting.

Published in Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA

Methane (CH4) emissions from sewage sludge composting can be reduced by using biochar more effectively. This study investigates the impact of different structure of biochar on CH4 emissions during sewage sludge composting. Corncob biochar (CB, pore size = 35.3990 nm), rice husk biochar (RB, pore size = 3.4242 nm) and wood biochar (WB, pore size = 1...

Reducing oil and gas well leakage: a review of leakage drivers, methane detection and repair options

Published in Environmental Research: Infrastructure and Sustainability

Oil and gas wells (OGWs) with integrity failures can be a conduit for methane and contaminant leakage to groundwater aquifers, surface water bodies and the atmosphere. While there have been numerous reviews addressing OGW leakage, there is a gap in the literature regarding an examination of OGW leakage that encompasses both abandoned and active wel...

Underestimation of Sector-Wide Methane Emissions from United States Wastewater Treatment.

Published in Environmental science & technology

An increasing percentage of US waste methane (CH4) emissions come from wastewater treatment (10% in 1990 to 14% in 2019), although there are limited measurements across the sector, leading to large uncertainties in current inventories. We conducted the largest study of CH4 emissions from US wastewater treatment, measuring 63 plants with average dai...

Urbanization can accelerate climate change by increasing soil N2 O emission while reducing CH4 uptake.

Published in Global change biology

Urban land use change has the potential to affect local to global biogeochemical carbon (C) and nitrogen (N) cycles and associated greenhouse gas (GHG) fluxes. We conducted a meta-analysis to 1) assess the effects of urbanization-induced land-use conversion on soil nitrous oxide (N2 O) and methane (CH4 ) fluxes, 2) quantify direct N2 O emission fac...

Evaluation of a model (RUMINANT) for prediction of DMI and CH4 from tropical beef cattle

Methane (CH4) is a byproduct of the digestion of cattle; this gas has a greenhouse effect in the atmosphere, which contributes to global warming. As the direct measurement of methane demands time and resources, the objective of this work was to evaluate the ability of a mathematical model (RUMINANT) to predict methane emissions from livestock. With...