Εμφάνιση αναρτήσεων με ετικέτα greenhouse gas emissions. Εμφάνιση όλων των αναρτήσεων
Εμφάνιση αναρτήσεων με ετικέτα greenhouse gas emissions. Εμφάνιση όλων των αναρτήσεων

Πέμπτη, Ιανουαρίου 15, 2015

US sets goal to cut methane emissions by oil, gas industry

The US government on Wednesday announced a new goal to cut methane emissions from the oil and gas sector by 40 to 45 percent from 2012 levels by 2025, as part of its efforts to fight climate change.

"Today's actions on methane emissions are an important step to take on climate change, putting us on track to achieve President ( Barack) Obama's goal of cutting net greenhouse gas emissions 26-28 percent below 2005 levels by 2025," the White House said in a statement. "Achieving this goal would save up to 180 billion cubic feet of wasted natural gas in 2025 -- enough to heat more than 2 million homes for an entire year."

To meet that goal, the Environmental Protection Agency (EPA) will issue a proposal to set standards for methane emissions from new and modified oil and gas production sources this summer, while the Interior Department will update its standards to reduce methane leaks from wells on public lands, the White House said.

In addition, the Department of Energy will get 25 million US dollars in funding to develop and demonstrate technologies to identify and reduce natural gas leaks.

Methane, a major component of natural gas, accounted for nearly 10 percent of US greenhouse gas emissions in 2012, of which nearly 30 percent came from oil production and the production, processing, transmission and distribution of natural gas, said a statement from the EPA.

While methane emissions from the oil and gas industry have declined 16 percent since 1990, they are projected to increase by about 25 percent over the next decade if no additional steps are taken, the EPA said.

The United States is now the largest natural gas producer in the world, and its oil production is at the highest level in nearly 30 years, according to the EPA.

   Source: Xinhua - globaltimes.cn
15/1/15
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Παρασκευή, Ιανουαρίου 02, 2015

China builds world's largest coal mine waste gas recovering project.

The world's largest facility to turn excess methane gas from coal mines into electricity has been completed in north China's Shanxi Province.

The facility was completed by the Lu'an Group, which owns the Gaohe Coal Mine in the coal-rich province.


The company announced on Tuesday it would soon start operating the generator with a capacity of 30 megawatts, capable of utilizing 99 percent of methane gas discharged from the coal mine.
The poisonous gas is a common emission during underground mining. Normally, mines will liquify the gas into methyl alcohol if it has a concentration higher than 30 percent, for concentrations between 10 percent and 20 percent it is captured and used to fuel internal combustion engines.

However, methane concentrations lower than 10 percent, which qualifies 81 percent of the gas released during mining, can not be consumed through direct combustion.

Jia Jian, deputy head of the Methane Gas Research Institute of the company, said the new technology has helped tackle the problem of how to dispose of the waste.

He said the project can decompose the gas into carbon dioxide and water under temperatures more than 950 Celsius, and use the heat and steam for power generation.

He said by recovering and utilizing the gas, the project can help reduce 1.4 million tonnes of greenhouse gases and produce 200 million kwh of electricity a year.

China's coal mines produce more than 10 billion cubic meters of low-concentration methane gas each year, which causes greenhouse gas emissions equivalent to 200 million tonnes of carbon dioxide.

Jia said the project of making waste profitable has a good market potential. The demonstration facility installed at Gaohe Coal Mine has drawn interest from a number of coal mining firms, which have signed agreements predicted to reduce 15.8 million tonnes of carbon emissions.

Coal mining firms in China are under greater pressure than ever to control carbon emissions as the government continues to step up efforts to cut emissions.

China has set an ambitious goal of reducing carbon emissions per unit of gross domestic product (GDP) by 40 to 45 percent from the level in 2005.

By 2013, carbon emissions per unit of GDP dropped by 28.56 percent from 2005. In the first three quarters of this year, energy consumption per unit of GDP dropped by 4.6 percent from a year earlier and carbon emissions were down by 5 percent, data showed.
 Source: Xinhua - globaltimes.cn

  2/1/15
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  *** Photo: www.gidynamics.nl

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