Sentences with phrase «co2 during combustion»

They compared estimated emissions for shale gas, conventional gas, coal (surface - mined and deep - mined) and diesel oil, taking into account direct emissions of CO2 during combustion, indirect emissions of CO2 necessary to develop and use the energy source and methane emissions, which were converted to equivalent value of CO2 for global warming potential.

However, natural gas has the huge disadvantage that it generates CO2 during combustion, which has a detrimental effect on the climate.

Not exact matches

In this process, CO2 can be isolated during combustion without having to use any additional energy, which means it can then go on to be stored.

Over the lifetime of the released CO2, the trapped heat exceeds the heat released during combustion by a factor of more than 100,000, researchers report online June 2 in Geophysical Research Letters.

Accuracy and precision of the system is tested monthly using propane combustion tests and average O2 and CO2 recoveries during this study were ≥ 98.0 %.

This is because the amount of CO2 released from E85 during combustion is practically identical to the level of carbon dioxide the plants absorbed from the atmosphere through photosynthesis when they were growing.

Tax approximate CO2 emissions from final combustion of biofuels and biomass based strictly on product type without attempting to account for carbon sequestered during growth cycles or emitted during harvesting, distillation or other chemical processing or land - use impacts.

During the past 3.5 billion years, photosynthesis has mostly NOT had to rely solely on combustion of fossil fuels to supply CO2.

By process of elimination, there is net flow of CO2 into vegetation / land (with emissions from them being overall negative aside from fuel combustion), which is unsurprising in contexts ranging from a multitude of studies on co2science.org to how satellite - measured global net terrestrial primary production increased by several percent per decade during the period of global warming (Nemani et al. 2003, for instance).

«THE stable carbon isotopic (13C / 12C) record of twentieth - century tree rings has been examined1 - 3 for evidence of the effects of the input of isotopically lighter fossil fuel CO2 (δ 13C ~ -25 ‰ relative to the primary PDB standard4), since the onset of major fossil fuel combustion during the mid-nineteenth century, on the 13C / 12C ratio of atmospheric CO2 (δ 13C ~ -7 ‰), which is assimilated by trees by photosynthesis.

Based on projected world energy requirements, the United Nations Department of Economic and Social Affairs (1956) has estimated an amount of fossil fuel combustion by the year 2000 that with our assumed partitions would give about a 25 percent increase in atmospheric CO2, compared to the amount present during the 19th Century.

Two statements during the presentation drew my interest: 1) geographical regions of high net release of CO2 were claimed in the talk to be regions with very little combustion of fossil fuels, and 2) increasing rainfall combined with increasing temperatures were suggested to increase decomposition rates of organic matter in the soil.

Most CCS claims to eliminate 90 percent of CO2 emission from combustion, but the total LCA estimate must include leaks of natural gas during production and the reagents used in the CCS process.

Coal combustion releases the greenhouse gases carbon dioxide (CO2) and nitrous oxide (N2O) during combustion.

Carbon dioxide (CO2) forms during coal combustion when one atom of carbon (C) unites with two atoms of oxygen (O) from the air.