How are tar sands found?

Common extraction methods include surface mining—where the extraction site is excavated—and “in-situ” mining, where steam is used to liquefy bitumen deep underground. The largest deposits of tar sands are found in Alberta, Canada.

Where do we find tar sands?

The largest deposits of tar sands in the world are found in Canada, and Venezuela, and much of the rest is found in various countries in the Middle East. In the United States, tar sands resources are primarily concentrated in eastern Utah, mostly on public lands.

What is tar sand and where can it be found in Canada?

The tar sands, sometimes called oil sands, are a massive site of oil extraction in Alberta. They cover an area larger than England and are one of the biggest industrial projects on the planet.

Are tar sands man made?

Tar is actually a man made material, however, and the name “oil sands” is usually judged to be a bit easier to understand. Oil sands aren't a new discovery either, the indigenous people of Canada used the vast Canadian oil sands to seal their canoes from time immemorial.

How are tar sands in Canada extracted?

Currently, 20% of oil sands reserves are accessible via mining techniques. Large shovels scoop the oil sand into trucks which then move it to crushers where the large clumps of earth are processed. Once the oil sand is crushed, hot water is added so it can be pumped to the extraction plant.

How do tar sands produce energy?

Tar sands consist of heavy crude oil mixed with sand, clay and bitumen. Extraction entails burning natural gas to generate enough heat and steam to melt the oil out of the sand. As many as five barrels of water are needed to produce a single barrel of oil.

Why is tar sand the world's dirtiest oil?

Tar sands extraction emits up to three times more global warming pollution than does producing the same quantity of conventional crude. It also depletes and pollutes freshwater resources and creates giant ponds of toxic waste. Refining the sticky black substance produces piles of petroleum coke, a hazardous by-product.

Can gasoline be made from tar sands?

Tar sands (referred to as oil sands in Canada) are a combination of clay, sand, water, and bitumen, a heavy, black, asphalt-like hydrocarbon. Bitumen from tar sands can be upgraded to synthetic crude oil and refined to make asphalt, gasoline, jet fuel, and value-added chemicals.

Is tar sands a fossil fuel?

tar sand, also called bituminous sand, deposit of loose sand or partially consolidated sandstone that is saturated with highly viscous bitumen. Oil recovered from tar sands is commonly referred to as synthetic crude and is a potentially significant form of fossil fuel.

Is tar sands oil dirty?

Tar sands oil is some of the dirtiest oil in the world. One of the byproducts is petcoke, or petroleum coke. It's a coal-like substance that builds up in piles in refineries that process tar sands, and those petcoke piles pose major health risks to the communities that surround them.

What do tar sands do?

However, most of the bitumen produced from tar sands is refined and mixed with lighter oils to produce synthetic crude oil that can be further refined and used in much the same way as typical crude oil.

What are the disadvantages to mining the tar sands?

The Cons of Tar Sands

• Clear-cutting is often required to access deposits. ...
• Extracting bitumen from tar sands is carbon-intensive. ...
• Dependence on tar sands may just prolong the inevitable. ...
• The waste products from tar sands are highly toxic. ...
• Leaks from tar sands operations could harm people and animals in the region.

How do you produce tar?

Tar can be produced from corn stalks by heating in a microwave. This process is known as pyrolysis. Tar is a viscous black liquid derived from the destructive distillation of organic matter. Most tar is produced from coal as a byproduct of coke production, but it can also be produced from petroleum, peat, or wood.

Is tar sands the same as shale oil?

Oil shale is a form of sedimentary rock that contains kerogen, which is released as a petroleum-like liquid when the rock is heated. Tar sands are a combination of clay, sand, water and bitumen, which is a heavy hydrocarbon.

What type of rock is tar sand?

Oil sands, also known as "tar sands," are sediments or sedimentary rocks composed of sand, clay minerals, water, and bitumen.

Are tar sands renewable energy?

This process occurred over millions of years. The three main types of fossil fuels are coal, oil, and natural gas. Two other less-used sources of fossil fuels are oil shales and tar sands.

What type of oil is tar sand?

The oil sands (or tar sands as they are sometimes inaccurately referred to), are a mixture of sand, water, clay and a type of oil called bitumen.

How is bitumen refined?

Refining bitumen generally requires a process called coking. Coking removes the excess carbon in the bitumen and distils it into a solid substance similar to coal called petroleum coke or petcoke.

Is tar sands refined in the US?

The much smaller (10,000 bpd) Calumet refinery in Great Falls, Montana is the only U.S. refinery to rely on tar sands crude for 100% of its feedstock. The top ten tar sands refining companies processed over 75 percent of all the tar sands refined in the U.S. in 2012 (see Table 1).

Who produces the cleanest oil in the world?

Of the oils analyzed, Tengiz offered the "cleanest," least carbon-intensive petroleum. The Suncor Synthetic H oil pumped out of Canada, meanwhile, produced the most emissions—over 810 kilograms of carbon per barrel, compared with Tengiz's 450 kg.

Why doesn't Canada produce more oil?

Because of limited pipeline capacity and export infrastructure, Canada sells 99% of its oil into a saturated North American market at low prices. This means Canada isn't getting full value for its resources.

Who has the dirtiest oil in the world?

Tar sands are the dirtiest source of oil on Earth. This extreme source of oil is currently being mined mainly in Alberta Canada, however, oil companies are now pursuing tar sands mines in the U.S. West. Tar sands are composed of clay, sand, water, and bitumen (a heavy black hydrocarbon).

How are tar sands transported?

Canadian tar sands are currently transported across Canada and the United States by ship, rail, and pipeline, with plans to expand substantially.

What is the tar sands pipeline?

Keystone XL is a proposed tar sands pipeline that would connect Alberta, Canada with Gulf Coast refineries that would carry 800,000 barrels per day of tar sands oil across the United States to be refined, exported and burned.

What can tar be found in?

The heavy, oily, dark-colored liquid called tar comes from wood, coal, bones, and other organic substances. It is made by the process called destructive distillation—subjecting the materials to intense heat in the absence of air.