ARC Gas & Supply LLC
4560 Nicky Boulevard,
Cuyahoga Heights,Ohio 44125
What is Propane?
Propane is a gas derived from natural gas and petroleum. It is found
mixed with natural gas and petroleum deposits. Propane is called a
fossil fuel because it was formed millions of years ago from the remains
of tiny sea animals and plants. When the plants and animals died, they
sank to the bottom of the oceans and were buried by layers of sediment
and sand that turned into rock. Over time, the layers became thousands
of feet thick.
The layers were subjected to enormous heat and pressure, changing the
energy-rich remains into petroleum and natural gas deposits. Eventually,
pockets of these fossil fuels became trapped in rocks, much as a wet
sponge holds water.
Propane is one of the many fossil fuels included in the liquefied
petroleum gas (LPG) family. Because propane is the type of LPG
most commonly used in the United States, propane and LPG are often
used synonymously. Butane is another LPG often used in lighters. The
chemical formula for propane is C3H8.
Just as water can change its physical state and become a liquid or a gas (steam vapor), so can propane.
Under normal atmospheric pressure and temperature, propane is a gas. Under moderate pressure and/or lower temperatures, however, propane changes into a liquid. Propane is easily stored as a liquid in pressurized tanks. Think of the small tanks you see attached to a gas barbecue grill, for example. Propane takes up much less space in its liquid form. It is 270 times more compact in its liquid state than it is as a gas.
A thousand gallon tank holding gaseous propane would provide a family enough cooking fuel for one week. A thousand gallon tank holding liquid propane would provide enough cooking fuel for more than five years! When propane vapor (gas) is drawn from a tank, some of the liquid in he tank instantly vaporizes to replace the vapor that was removed.
Propane is nicknamed the portable gas because it is easier to store and ransport than natural gas, which requires pipelines. ike natural gas, propane is colorless and odorless. An odorant called ercaptan is added to propane (as it is to natural gas) to serve as a arning agent for escaping gas. And, like all fossil fuels, propane is a nonnewable energy source. We can’t make more propane in a short peiod of time.
History of Propane
Propane does not have a long history. It wasn’t discovered until 1912 when people were trying to find a way to store gasoline. The problem with gasoline was that it evaporated when stored under normal conditions.
Dr. Walter Snelling, directing a series of experiments for the U.S. Bureau of Mines, discovered that several evaporating gases could be changed into liquids and stored at moderate pressure. The most plentiful of those gases was propane. Dr. Snelling developed a way to bottle the liquid gas. One year later, the propane industry began heating American homes. By 1915, propane was being used in torches to cut through metal.
Propane comes from natural gas and petroleum wells. Forty-five percent of the propane used in the United States is extracted from raw natural gas. Raw natural gas contains about 90 percent methane, five percent propane, and five percent other gases. The propane is separated from the raw natural gas and the other gases at a natural gas processing plant.
Forty-five percent of the propane is extracted from crude petroleum. Petroleum is separated into its various products at a processing plant called a refinery. The other ten percent of the propane we use in the U.S. is imported from other countries, mostly from Canada and Mexico.
How does propane get from natural gas processing plants and oil refineries to the consumer? Usually, propane first moves through underground pipelines to distribution terminals across the nation. There are about 70,000 miles of pipeline in the United States moving propane to 13,500 bulk storage and distribution terminals.
Distribution terminals, which are operated by propane companies, function like warehouses that store merchandise before shipping it to stores and shops. Sometimes, especially in the summer when less energy is needed for heating, propane is stored in large underground storage caverns.
After storage at distribution terminals, propane is transported by railroad tank cars, transport trucks, barges, and tanker ships to bulk plants. A bulk plant is where local propane dealers fill their small tank trucks, called bobtails.
People who use very little propane—backyard barbecuers, for example—must bring their propane cylinders to a dealer to be filled. There are about 25,000 propane dealers, such as hardware stores and gas stations, in the U.S. today.
How Propane is Used
Propane is a clean–burning, versatile fuel. It is used by nearly everyone in the United States—in homes, on farms, by business, and in industry— mostly for producing heat and operating equipment.
Homes and businesses use about one–third of the propane consumed in the U.S. Propane is used mostly in homes in rural areas that do not have natural gas service, as well as in manufactured (mobile) homes. Nearly 49 million households use propane to meet some of their energy needs. Nearly 6 million households use propane as their main heating source.
About one-fifth of mobile homes use propane for heating.
Propane is also used in homes for air conditioning, heating water, cooking and refrigerating foods, drying clothes, lighting, and fueling fireplaces.
Homes that use propane as a main energy source usually have a large propane tank outside of the house that stores propane under pressure as a liquid.
Propane dealers deliver propane to the residences in trucks, filling the tanks several times a year as needed. The average residential propane tank holds between 500 and1,000 gallons of liquid fuel.
Millions of backyard cooks use propane–powered gas grills for cooking. And recreational vehicles (RV’s) usually have propane-fueled appliances, giving them a portable source of energy for cooking, hot water, and refrigeration.
Approximately 40 percent of America’s farms—865,000—use propane to help meet their energy needs. Farmers use propane to dry crops such as corn, soybeans, grains, tobacco, apples, peanuts, and onions. Propane is also used to ripen fruit, heat water, and refrigerate foods.
Propane flamethrowers are used to control weeds. Propane is also used to heat barns, chicken houses, stock tanks, nurseries, greenhouses, orchards, and incubators.
Propane is one fuel farmers use to operate a variety of farm equipment, including tractors, weeders, irrigation pumps, stand-by generators, and seedling planters.
More than one million business and commercial establishments— such as hotels, schools, hospitals, restaurants, and laundromats—use propane for heating and cooling air, cooking and refrigerating food, heating water, and lighting.
Industry uses more than half of the propane consumed in the U.S. Some industries find propane well suited to their special needs. Metal workers use propane tanks to fuel their cutting torches and other equipment. Industries also use propane for soldering, vulcanizing, and other processes that need a ready heat source. More than 350,000 industrial sites use propane as fuel.
The United States uses more propane gas than any other country in the world. Propane supplies one percent of our total energy needs and ranks as the seventh most important energy source.
About 90 percent of the propane used in this country is produced in the United States from petroleum and natural gas but, since we import two-thirds of the petroleum we use, more than 30 percent of the propane we produce here is made from imported fuel.
Propane and the Environment
Propane is a very clean burning fossil fuel, which explains its use in indoor settings. It was approved as an alternative fuel under the