calcium carbide

The Kingdom of Bhutan (IPA: /buː'tɑːn/ Listen ▶ (help·info)) is a landlocked South Asian nation situated between India and China.The landscape ranges from the subtropical plains to the Himalayan heights, an elevation gain of more than 7000 m. Its economy is based on subsistence agriculture (emphasizing corn and rice) and animal husbandry. Small, terraced farms predominate. Forestry, hydroelectric ...

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• Bhutan - The Name
• Bhutan - History
• Bhutan - Geography
• Bhutan - Economy
• Bhutan - Government and politics
• Bhutan - Districts
• Bhutan - Military and foreign affairs
• Bhutan - Demographics
• Bhutan - Culture
• Bhutan - Current Affairs
• Bhutan - Notes

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The use of ethanol as a fuel for internal combustion engines, either alone or in combination with other fuels, has been given much attention mostly because of its possible environmental and long-term economical advantages over fossil fuel. Both ethanol and methanol have been considered for this purpose. While both can be obtained from petroleum or natural gas, ethanol may be the most interesting because many believe it to be a renewable resource, easily obtained from sugar or starch in crops and other agricultural produce such ...

Including:

• Ethanol fuel - Ethanol fuels
• Ethanol fuel - Production and Distribution
• Ethanol fuel - Other alcohols
• Ethanol fuel - Ethanol and hydrogen
• Ethanol fuel - Alternate sources
• Ethanol fuel - Economics of corn ethanol in the U.S.A.
• Ethanol fuel - Net fuel energy balance
• Ethanol fuel - Energy balance in the United States
• Ethanol fuel - Arguments and criticisms
• Ethanol fuel - Air pollution
• Ethanol fuel - Fire safety
• Ethanol fuel - Greenhouse gases
• Ethanol fuel - Renewable resource
• Ethanol fuel - Dependency on foreign oil and international crime
• Ethanol fuel - Statism
• Ethanol fuel - Cost
• Ethanol fuel - Ethanol fuel in Colombia
• Ethanol fuel - Ethanol fuel in Brazil
• Ethanol fuel - U.S. National security

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Carbide lamps (acetylene lamps) are simple lamps that produce and burn acetylene gas by reacting calcium carbide with water. These lamps were formerly found in mines (not to be confused with the Davy lamp), vintage cars, and lighthouses; they are still sometimes used by cavers. Pellets or chunks of calcium carbide (CaC2) are placed in a chamber (the generator). A second chamber is filled with water. A screw valve or another mechanism is used to control the rate at which the water is allowed to drip into ...

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The chemical compound and unsaturated hydrocarbon acetylene, also known under IUPAC nomenclature (see IUPAC nomenclature of organic chemistry) as ethyne, was discovered in 1836 by Edmund Davy, in England. Acetylene - Preparation. The principal raw materials for acetylene manufacture are calcium carbonate (limestone) and coal. The calcium carbonate is first converted into calcium oxide and the coal into coke, then the two are reacted with each other to form calcium carbide and carbon monoxide:

Including:

• Acetylene - Preparation
• Acetylene - Properties
• Acetylene - Safety and handling
• Acetylene - Reactions
• Acetylene - Uses

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Calcium phosphide (CP, Ca3P2) is a chemical that has uses in incendiary bombs. It has the appearance of red-brown crystalline powder or grey lumps, with melting point of 1600 °C. Its trade name is Photophor. Its CAS number is 1305-99-3[1]. On contact with acids or water, calcium phosphide releases phosphine, which ignites spontaneously. Metal phosphides have been used as a means of killing rodents. A mixture of food and calcium phosphide is left where the ...

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Stone tools, weapons, and remnants of large stone structures provide evidence that Bhutan was inhabited as early as 2000 BC. Historians have theorised that the state of Lhomon (literally, "southern darkness"), or Monyul ("Dark Land", a reference to the Monpa – the aboriginal peoples of Bhutan) may have existed between 500 BC and 600 AD. The names Lhomon Tsendenjong (Sandalwood Country), and Lhomon Khashi, or Southern Mon (country of four approaches) have been found in ancient ...

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Bhutan, Bhutan - The Name, Bhutan - History, Bhutan - Geography, Bhutan - Economy, Bhutan - Government and politics, Bhutan - Districts, Bhutan - Military and foreign affairs, Bhutan - Demographics, Bhutan - Culture, Bhutan - Current Affairs, Bhutan - Notes

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Wöhler was also a co-discoverer of beryllium and silicon, as well as the synthesis of calcium carbide, among others. In 1834, Wöhler and Liebig published an investigation of the oil of bitter almonds. They proved by their experiments that a group of carbon, hydrogen, and oxygen atoms can behave like an element, take the place of an element, and can be exchanged for elements in chemical compounds. Thus the foundation was laid of the doctrine of compound radicals, ...

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Friedrich Wöhler, Friedrich Wöhler - Early days, Friedrich Wöhler - Contributions to chemistry, Friedrich Wöhler - Major works discoveries and research, Friedrich Wöhler - Final days and legacy, Friedrich Wöhler - Works

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To be viable, an alcohol-based fuel economy should have positive net fuel energy balance. Namely, the total fuel energy expended in producing the alcohol — including fertilizing, farming, harvesting, transport, fermentation, distillation, and distribution, as well as the fuel used in building the farm and fuel plant equipment — should not exceed the energy contents of the product. This is a controversial subject charged with potential bias. Much of it depends on what is included and what is excluded from the calculation, particula ...

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Ethanol fuel, Ethanol fuel - Ethanol fuels, Ethanol fuel - Production and Distribution, Ethanol fuel - Other alcohols, Ethanol fuel - Ethanol and hydrogen, Ethanol fuel - Alternate sources, Ethanol fuel - Net fuel energy balance, Ethanol fuel - Energy balance in the United States, Ethanol fuel - Arguments and criticisms, Ethanol fuel - Air pollution, Ethanol fuel - Fire safety, Ethanol fuel - Greenhouse gases, Ethanol fuel - Renewable resource, Ethanol fuel - Dependency on foreign oil and international crime, Ethanol fuel - Statism, Ethanol fuel - Cost, Ethanol fuel - Ethanol fuel in Colombia, Ethanol fuel - Ethanol fuel in Brazil, Ethanol fuel - Ethanol fuel in the United States, Ethanol fuel - Ethanol fuel in the Midwest, Ethanol fuel - U.S. National security

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In the warmer months the Farnes, an important wildlife habitat, are much visited by boat trips from Seahouses. Local boats are licensed to land passengers on Inner Farne, Staple Island and the Longstone; landing on other islands is prohibited to protect the wildlife. At the right time of year many Puffins can be seen and these are very popular with visitors; on the Inner Farne, the Arctic Terns nest close to the path and will attack visitors who come too close (visitors are strongly advised to wear hats). Some of the islands also support a p ...

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Farne Islands, Farne Islands - History, Farne Islands - Ecology and natural history, Farne Islands - Geology, Farne Islands - Diving

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Stone tools, weapons, and remnants of large stone structures provide evidence that Bhutan was inhabited as early as 2000 BC. Historians have theorised that the state of Lhomon (literally, "southern darkness"), or Monyul ("Dark Land", a reference to the Monpa – the aboriginal peoples of Bhutan) may have existed between 500 BC and 600 AD. The names Lhomon Tsendenjong (Sandalwood Country), and Lhomon Khashi, or Southern ...

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Bhutan, Bhutan - The Name, Bhutan - History, Bhutan - Geography, Bhutan - Economy, Bhutan - Government and politics, Bhutan - Districts, Bhutan - Military and foreign affairs, Bhutan - Demographics, Bhutan - The Nepali minority and human rights issues, Bhutan - Language, Bhutan - Culture, Bhutan - Notes

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An electric arc furnace used for steelmaking consists of a refractory-lined vessel, usually water-cooled in larger sizes, covered with a retractable roof, and through which one or more graphite electrodes enter the furnace. For a typical AC furnace three electrodes are used. Electrodes are round in section, and typically in segments with threaded couplings, so that as the electrodes wear, new segments can be added. The arc forms between the charged material and the electrode, and the charge is heated both by current passing through the ...

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Electric arc furnace, Electric arc furnace - History, Electric arc furnace - Construction, Electric arc furnace - Advantages of electric arc furnace for steelmaking, Electric arc furnace - Environmental issues, Electric arc furnace - Other electric arc furnaces

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The principal raw materials for acetylene manufacture are calcium carbonate (limestone) and coal. The calcium carbonate is first converted into calcium oxide and the coal into coke, then the two are reacted with each other to form calcium carbide and carbon monoxide: CaO + 3C → CaC2 + CO Calcium carbide (or calcium acetylide) and water are then reacted by any of several methods to produce acetylene and calcium hydroxide. CaC2 + 2H2O → Ca(OH)2< ...

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Acetylene, Acetylene - Preparation, Acetylene - Properties, Acetylene - Safety and handling, Acetylene - Reactions, Acetylene - Uses

Read more here: » Acetylene: Encyclopedia II - Acetylene - Preparation

To be viable, an alcohol-based fuel economy should have positive net fuel energy balance. Namely, the total fuel energy expended in producing the alcohol — including fertilizing, farming, harvesting, transport, fermentation, distillation, and distribution, as well as the fuel used in building the farm and fuel plant equipment — should not exceed the energy contents of the product. This is a controversial subject charged with potential bias. Much of it depends on what is included and what is excluded from the calculation, particula ...

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Ethanol fuel, Ethanol fuel - Ethanol fuels, Ethanol fuel - Production and Distribution, Ethanol fuel - Other alcohols, Ethanol fuel - Ethanol and hydrogen, Ethanol fuel - Alternate sources, Ethanol fuel - Economics of corn ethanol in the U.S.A., Ethanol fuel - Net fuel energy balance, Ethanol fuel - Energy balance in the United States, Ethanol fuel - Arguments and criticisms, Ethanol fuel - Air pollution, Ethanol fuel - Fire safety, Ethanol fuel - Greenhouse gases, Ethanol fuel - Renewable resource, Ethanol fuel - Dependency on foreign oil and international crime, Ethanol fuel - Statism, Ethanol fuel - Cost, Ethanol fuel - Ethanol fuel in Colombia, Ethanol fuel - Ethanol fuel in Brazil, Ethanol fuel - U.S. National security

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Ethanol fuel - Ethanol fuel in the Midwest. The so-called corn belt in the Midwestern United States produces large amounts of corn (American English for maize). Sugars from this corn can be and are used to make ethanol. Minnesota has pioneered the use of ethanol fuel mixes in the United States, and currently it is the only state in the US in which all gasoline mixes must have at least 10% ethanol (90% gasoline) by volume. Laws have been passed which mandate a 20% mix in all gasoline in the state by 2013.[14] Ther ...

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Ethanol fuel, Ethanol fuel - Ethanol fuels, Ethanol fuel - Production and Distribution, Ethanol fuel - Other alcohols, Ethanol fuel - Ethanol and hydrogen, Ethanol fuel - Alternate sources, Ethanol fuel - Net fuel energy balance, Ethanol fuel - Energy balance in the United States, Ethanol fuel - Arguments and criticisms, Ethanol fuel - Air pollution, Ethanol fuel - Fire safety, Ethanol fuel - Greenhouse gases, Ethanol fuel - Renewable resource, Ethanol fuel - Dependency on foreign oil and international crime, Ethanol fuel - Statism, Ethanol fuel - Cost, Ethanol fuel - Ethanol fuel in Colombia, Ethanol fuel - Ethanol fuel in Brazil, Ethanol fuel - Ethanol fuel in the United States, Ethanol fuel - Ethanol fuel in the Midwest, Ethanol fuel - U.S. National security

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The earliest recorded inhabitants of the Farne Islands were various Culdees, some connected with Lindisfarne. This followed the old Gaelic tradition of island hermitages, found in Ireland, and Scotland. The first visitor recorded by name was Saint Aidan followed by Saint Cuthbert. The latter was called to the bishopric of Lindisfarne but after two years he returned to the solitude of the Inner Farne and died there in 687. Among other acts, St Cuthbert introduced special laws in 676 protecting the Eider ducks and other seabirds nesting on the islands; these are thought to be the earliest bi ...

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Farne Islands, Farne Islands - History, Farne Islands - Ecology and natural history, Farne Islands - Geology, Farne Islands - Diving

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Colombia’s first sugarcane ethanol plant began production in 2005, with output of 300,000 liters a day in Cauca. The $20 million Ingenio del Cauca plant owned by businessman Carlos Ardila is the first of five plants with a total investment of $100 million which should begin operation over the next few months. The government aims to gradually convert the nation’s auto fuel supplies to a mixture of 10 percent ethanol and 90 percent gas ...

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Ethanol fuel, Ethanol fuel - Ethanol fuels, Ethanol fuel - Production and Distribution, Ethanol fuel - Other alcohols, Ethanol fuel - Ethanol and hydrogen, Ethanol fuel - Alternate sources, Ethanol fuel - Net fuel energy balance, Ethanol fuel - Energy balance in the United States, Ethanol fuel - Arguments and criticisms, Ethanol fuel - Air pollution, Ethanol fuel - Fire safety, Ethanol fuel - Greenhouse gases, Ethanol fuel - Renewable resource, Ethanol fuel - Dependency on foreign oil and international crime, Ethanol fuel - Statism, Ethanol fuel - Cost, Ethanol fuel - Ethanol fuel in Colombia, Ethanol fuel - Ethanol fuel in Brazil, Ethanol fuel - Ethanol fuel in the United States, Ethanol fuel - Ethanol fuel in the Midwest, Ethanol fuel - U.S. National security

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The use of alcohol as fuel is advocated with various arguments, mainly relating to its beneficial effects on the local and global environment, its independence from foreign oil, and its economic advantages. Critics generally dispute those arguments, claim that the switch would be expensive, and object to perceived need for increased government subsidies, taxes, and regulations. Ethanol fuel - Air pollution. There has long been widespread acknowledgement that ethanol is a cleaner-burning fuel than gasoline. ...

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Ethanol fuel, Ethanol fuel - Ethanol fuels, Ethanol fuel - Production and Distribution, Ethanol fuel - Other alcohols, Ethanol fuel - Ethanol and hydrogen, Ethanol fuel - Alternate sources, Ethanol fuel - Net fuel energy balance, Ethanol fuel - Energy balance in the United States, Ethanol fuel - Arguments and criticisms, Ethanol fuel - Air pollution, Ethanol fuel - Fire safety, Ethanol fuel - Greenhouse gases, Ethanol fuel - Renewable resource, Ethanol fuel - Dependency on foreign oil and international crime, Ethanol fuel - Statism, Ethanol fuel - Cost, Ethanol fuel - Ethanol fuel in Colombia, Ethanol fuel - Ethanol fuel in Brazil, Ethanol fuel - Ethanol fuel in the United States, Ethanol fuel - Ethanol fuel in the Midwest, Ethanol fuel - U.S. National security

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Although not as common as ethanol, other fuel alcohols have been considered, notably methanol, butanol, and propanol. These alcohols are toxic, although the latter two are considerably less toxic than methanol, and considerably less volatile. In particular, butanol has a high flashpoint of 35 °C, which is a benefit for fire safety, but a difficulty for starting engines, particularly in cold weather. (In comparison, ethanol has a fla ...

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Ethanol fuel, Ethanol fuel - Ethanol fuels, Ethanol fuel - Production and Distribution, Ethanol fuel - Other alcohols, Ethanol fuel - Ethanol and hydrogen, Ethanol fuel - Alternate sources, Ethanol fuel - Net fuel energy balance, Ethanol fuel - Energy balance in the United States, Ethanol fuel - Arguments and criticisms, Ethanol fuel - Air pollution, Ethanol fuel - Fire safety, Ethanol fuel - Greenhouse gases, Ethanol fuel - Renewable resource, Ethanol fuel - Dependency on foreign oil and international crime, Ethanol fuel - Statism, Ethanol fuel - Cost, Ethanol fuel - Ethanol fuel in Colombia, Ethanol fuel - Ethanol fuel in Brazil, Ethanol fuel - Ethanol fuel in the United States, Ethanol fuel - Ethanol fuel in the Midwest, Ethanol fuel - U.S. National security

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A view is emerging that current consumers of fossil fuels should move to using hydrogen as a fuel, creating a new so-called hydrogen economy. However, hydrogen is not a fuel source in and of itself. Rather, it is merely an intermediate energy storage medium existing between an energy source (be it solar power, biofuels, and nuclear power) and the place where the energy will be used. Because hydrogen in its gaseous state takes up a very large volume when compared to other fuels, logistics becomes a very difficult problem. One possible solutio ...

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Ethanol fuel, Ethanol fuel - Ethanol fuels, Ethanol fuel - Production and Distribution, Ethanol fuel - Other alcohols, Ethanol fuel - Ethanol and hydrogen, Ethanol fuel - Alternate sources, Ethanol fuel - Net fuel energy balance, Ethanol fuel - Energy balance in the United States, Ethanol fuel - Arguments and criticisms, Ethanol fuel - Air pollution, Ethanol fuel - Fire safety, Ethanol fuel - Greenhouse gases, Ethanol fuel - Renewable resource, Ethanol fuel - Dependency on foreign oil and international crime, Ethanol fuel - Statism, Ethanol fuel - Cost, Ethanol fuel - Ethanol fuel in Colombia, Ethanol fuel - Ethanol fuel in Brazil, Ethanol fuel - Ethanol fuel in the United States, Ethanol fuel - Ethanol fuel in the Midwest, Ethanol fuel - U.S. National security

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Sugar cane grows in the extreme southern United States, but not in the cooler climates where corn is dominant. However, many regions that currently grow corn are also appropriate areas for growing other crops that can be used for energy production. These crops include corn stover, sugar beets, wheat straw, hybrid poplars, and dedicated herbaceous biomass feedstocks such as switchgrass or bermudagrass. Some studies indicate that using these sugar beets would be a much more efficient method for making ethanol in the U.S. than using corn. Unite ...

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Ethanol fuel, Ethanol fuel - Ethanol fuels, Ethanol fuel - Production and Distribution, Ethanol fuel - Other alcohols, Ethanol fuel - Ethanol and hydrogen, Ethanol fuel - Alternate sources, Ethanol fuel - Net fuel energy balance, Ethanol fuel - Energy balance in the United States, Ethanol fuel - Arguments and criticisms, Ethanol fuel - Air pollution, Ethanol fuel - Fire safety, Ethanol fuel - Greenhouse gases, Ethanol fuel - Renewable resource, Ethanol fuel - Dependency on foreign oil and international crime, Ethanol fuel - Statism, Ethanol fuel - Cost, Ethanol fuel - Ethanol fuel in Colombia, Ethanol fuel - Ethanol fuel in Brazil, Ethanol fuel - Ethanol fuel in the United States, Ethanol fuel - Ethanol fuel in the Midwest, Ethanol fuel - U.S. National security

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