Showing posts with label coal. Show all posts
Showing posts with label coal. Show all posts

Sunday, April 4, 2010

One consequence of China's coal imports - the risks of shipping

Chinese Freighter Slams Into Great Barrier Reef

The Chinese carrier Shen Neng 1 ran aground and was leaking oil around the Great Barrier Reef off of Australia.

By Keith Bradsher
Published: April 4, 2010 (The New York Times)

HONG KONG — A large Chinese freighter carrying coal to China ran aground late Saturday on a section of the Great Barrier Reef off Australia, raising fears that it might leak engine fuel on coral in its immediate vicinity.

The Shen Neng 1 crashed into the reef at full speed a few hours after leaving the port of Gladstone, the Australian authorities said. The ship, which was nine miles outside its authorized shipping lane, was hauling 72,000 tons of coal and had 1,000 tons of bunker fuel aboard.

Australian officials warned that the vessel was in danger of breaking apart, and there were reports on Sunday night of traces of oil already leaking from the vessel. An Australian aircraft reportedly dropped chemical dispersants on the oil.

Basil M. Karatzas, a project manager at Compass Maritime Services, a ship broker in Fort Lee, N.J., said that it was not unusual that the 755-foot Shen Neng 1 would be carrying that much oil. A ship of that size and design would burn about 35 tons of fuel a day, he said, and would require at least two weeks to sail from eastern Australia to China.

Ships headed to China carry extra fuel to be ready for long delays on arrival, as port delays are common because commodities are pouring into the country to sustain its economic boom. Depending on the fuel’s density, the amount carried by the Shen Neng would equate to about 300,000 gallons.

“Weather permitting, they should be able to pull the oil off the vessel,” Mr. Karatzas said. As to the ship’s cargo, he added, coal is much less toxic than oil, but it could blanket the sea bottom if the ship comes apart.

China is the world’s largest consumer of coal, burning more than the United States and the European Union combined. China has rapidly increased its imports in the past year, partly because domestic supply has not increased fast enough to keep up with power plants coming into use.

Coal imported from Australia, Indonesia and the Philippines also tends to burn much more cleanly than the mostly low-quality coal mined in China, and the Chinese government has been putting ever greater pressure on coal-fired power plants to manage their pollution.

Relations between China and Australia have frayed since a Chinese court imposed prison sentences of seven to 14 years on four executives of Rio Tinto, an Australian mining company. The executives pleaded guilty to accepting $13.5 million in bribes to influence their allocation of scarce iron ore to Chinese steelmakers.

Rio Tinto dismissed the executives, but the Australian government criticized the harshness of the seven-year sentence for bribery imposed on Stern Hu, an Australian citizen who was among the four.

Australia’s environmental movement is very sensitive to any threat to the Great Barrier Reef, making it likely that a full investigation will be carried out into how the Shen Neng 1 strayed so far off course. It ran aground near Great Keppel Island off eastern Australia, nearly halfway off the coast between Brisbane and Cairns, in an area of the reef that is subject to especially stringent environmental restrictions and that is popular with sport fishermen.

“Australia is one of those jurisdictions that doesn’t take these things lightly,” Mr. Karatzas said.

An Australian police boat was nearby to rescue the crew of 23 if the vessel did break up.


Saturday, February 20, 2010

Asian pollution delays inevitable warming

... some irony here ...

Asian pollution delays inevitable warming
Dirty power plants exert temporary protective effect.

By Jeff Tollefson
Published online 17 February 2010 | Nature 463, 860-861 (2010)

The grey, sulphur-laden skies overlying parts of Asia have a bright side — they reflect sunlight back into space, moderating temperatures on the ground. Scientists are now exploring how and where pollution from power plants could offset, for a time, the greenhouse warmingThe grey, sulphur-laden skies overlying parts of Asia have a bright side — they reflect sunlight back into space, moderating temperatures on the ground. Scientists are now exploring how and where pollution from power plants could offset, for a time, the greenhouse warming of the carbon dioxide they emit.

A new modelling study doubles as a thought experiment in how pollution controls and global warming could interact in China and India, which are projected to account for 80% of new coal-fired power in the coming years. If new power plants were to operate without controlling pollution such as sulphur dioxide (SO2) and nitrogen oxides (NOX), the study finds, the resulting haze would reflect enough sunlight to overpower the warming effect of CO2 and exert local cooling.

But this effect would not be felt uniformly across the globe and would last only a few decades. In the long run, CO2 would always prevail, and the world could experience a rapid warming effect if the skies were cleaned up decades down the road.

...

How quickly China and India will move to clean up their coal emissions is unclear. In the past few years China has been aggressively installing SO2 scrubbers on many of its power plants in an attempt to improve air quality and protect public health. But some experts have questioned whether those scrubbers are being used properly — or even turned on.

Full article here: http://www.nature.com/news/2010/100217/full/463860b.html