Greenhouse

Natural gas byproducts now being processed at a nearby plant in Alberta for Shell Canada Ltd.’s refinery have reduced greenhouse gas (GHG) emissions and given the company a competitive edge, officials said Thursday.

The nation’s natural gas resources, which have grown with the expanded potential of shale plays — including as much as 20 years supply from the Marcellus Shale — can be used to cost-effectively generate electricity, and any environmental burdens will come primarily from combustion when the fuel is used, not when it is extracted, according to a report from the Department of Energy (DOE).

While 2009’s recessionary economy was credited for nationwide reductions in greenhouse gas (GHG) emissions, GHG emissions from power generating facilities were on the decline for another reason: greater reliance on natural gas-fueled plants, according to Harvard University researchers.

While 2009’s recessionary economy was credited for nationwide reductions in greenhouse gas (GHG) emissions, GHG emissions from power generating facilities were on the decline for another reason: greater reliance on natural gas-fueled plants, according to Harvard University researchers.

As perhaps a harbinger of climate change and cap-and-trade efforts aimed at greenhouse gas (GHG) emissions, Arizona formally pulled out of the regional Western Climate Initiative (WCI), a once-promising multi-state effort involving seven states and four Canadian provinces. California and the provinces now appear to be leading the charge alone.

Contrary to some previous reports, natural gas offers greenhouse gas (GHG) emissions advantages compared with coal-fired power generation, according to a recent study by Worldwatch Institute and Deutsche Bank Climate Change Advisors. Earlier this year the U.S. Environmental Protection Agency updated its methodology for estimating methane (CH4) emissions from natural gas systems, but gas-fired generation still releases 47% less GHGs than coal from source to use, the researchers said. A controversial study by Cornell University earlier this year reported that CH4 leaks were a particular concern for gas produced from shale formations using hydraulic fracturing (see Daily GPI, April 13). But even counting higher estimated emissions of CH4 from shale gas production activities, gas-fired power generation still beats coal-fired power by a wide margin when it comes to overall GHG emissions, according to a subsequent study published by the gas-friendly American Clean Skies Foundation (see Daily GPI, April 21). IHS Cambridge Energy Research Associates in August said GHG emissions from shale gas production likely are “significantly overstated” (see Shale Daily, Aug. 25). Another recent study by the National Center for Atmospheric Research found that burning natural gas emits “far less” carbon dioxide than coal but even so, more reliance on gas won’t significantly slow climate change (see Daily GPI, Sept. 15).

Contrary to some previous reports, natural gas offers greenhouse gas (GHG) emissions advantages compared with coal-fired power generation, according to a recent study by Worldwatch Institute and Deutsche Bank Climate Change Advisors. Earlier this year the U.S. Environmental Protection Agency updated its methodology for estimating methane (CH4) emissions from natural gas systems, but gas-fired generation still releases 47% less GHGs than coal from source to use, the researchers said. A controversial study by Cornell University earlier this year reported that CH4 leaks were a particular concern for gas produced from shale formations using hydraulic fracturing (see Shale Daily, April 13). But even counting higher estimated emissions of CH4 from shale gas production activities, gas-fired power generation still beats coal-fired power by a wide margin when it comes to overall GHG emissions, according to a subsequent study published by the gas-friendly American Clean Skies Foundation (see Shale Daily, April 21). IHS Cambridge Energy Research Associates in August said GHG emissions from shale gas production likely are “significantly overstated” (see Shale Daily, Aug. 25). Another recent study by the National Center for Atmospheric Research found that burning natural gas emits “far less” carbon dioxide than coal but even so, more reliance on gas won’t significantly slow climate change.

Natural gas groups have embraced the Department of Energy’s (DOE) decision to measure the energy use and greenhouse gas (GHG) emissions of energy products, such as natural gas, electricity, oil and coal, from the time they are extracted or generated to the point of end-use consumption.

Natural gas groups have embraced the Department of Energy’s (DOE) decision to measure the energy use and greenhouse gas (GHG) emissions of energy products, such as natural gas, electricity, oil and coal, from the time they are extracted or generated to the point of end-use consumption.