Natural Gas Alternative: Synthetic Natural Gas - SNG
LPG gas can be used as a direct alternative for natural gas, called SNG - synthetic natural gas. SNG is a carefully blended mix of LPG and compressed air. SNG can be used in place of natural gas, as it has virtually identical combustion characteristics.
It can be used alone or mixed with regular natural gas. No changes are required in burners, regulators or gas jets.
With the looming potential for natural gas shortages and price escalations, large natural gas users need to examine the alternatives.
There is a substitute called Sythetic Natural Gas, but what is it and how do you make it?
Calculate the LPG (Propane) Consumption per Hour by Burner Size - Propane Gas Consumption
A gallon of propane contains 91,502 BTU of heat energy whilst the BTU rating for appliances is in BTU per hour, based on burner size. Dividing 91,502 by the BTU per hour rating gives you the number of hours that one gallon of propane will last.
LPG (propane) gas consumption is based on the burner size or sizes of the appliance, as some have more than one burner. All gas appliances are rated by the manufacturers for propane gas consumption. To work out how many hours burn in an LPG gas bottle, divide the energy (MJ) by the total MJ input of your appliance (MJ /h).
They are expressed in either MJ/hr or BTU/hr, depending on which country you live in.
The propane gas consumption ratings are typically found in the product specifications.
Bottled gas is a name used for chemicals which are in a gaseous state at standard temperature and pressure (STP) and stored under pressure in steel, galvanised steel, aluminium, or composite gas bottles or other vessels.
Bottled gas is a flammable hydrocarbon gas liquefied through pressurisation and stored in gas bottles or gas cylinders. LPG is also called bottled gas, along with propane, butane and mixtures of these gases. Bottled gas comes from natural gas processing and oil refining.
Bottled gas refers to a gas that can be compressed as a gas or liquefied under pressure within a gas bottle of other vessel, typically made of steel, aluminum, stainless steel or composites. These gases are all gaseous at STP - which is 0°C (32°F) at 1atm (100 kPa or 1 bar) - when released from the gas bottle.
In some countries, bottled gas can also refer to butane or propane/butane mixtures of gas.
Is LPG Bottled Gas
LPG is bottled gas. “Bottled gas” is typically a synonym for “LPG” or “propane” stored in gas bottles or gas cylinders. Whilst there are actually many types of gas that come in bottles or cylinders, including industrial and welding gases, it is generally understood to that LPG is bottled gas – LPG (propane) in gas bottles.
How LPG Gas Cylinder-Bottle Works - How Does a Propane Tank Work
The pressure in a gas cylinder is too high for most applications, at up to 2482 kPa. Gas regulators are connected to gas cylinder outlet valves to reduce the LPG-propane gas cylinder pressure to the much lower 2.75 kPa working pressure.
A gas cylinder works with pressure that is usually far in excess of what is required as the working pressure. There are specific gas regulators, by gas type, that are used to reduce the cylinder pressure down to the working pressure needed.
LPG is under pressure, as a liquid, and turns back into gas when you release some pressure. Gas cylinder pressure is too high and erratic to use, as temperature variation affects pressure. Gas cylinders require a gas regulator to reduce gas bottle pressure and provide a consistent working pressure.
CNG - compressed natural gas storage cylinders have a tare weight approximately 3x heavier than comparable capacity LPG cylinders. LPG can be compressed into a liquid, increasing its energy density. The biggest difference between CNG and LPG cars is the fuel itself. CNG is methane and LPG is propane and/or butane.
CNG is compressed natural gas – methane.
LPG is liquefied petroleum gas – propane.
There are many similarities between LPG and CNG, as well as some major differences.
LPG is called liquefied gas because it is easily transformed into a liquid. LPG needs only low pressure or refrigeration to change it into liquid from its gaseous state. As a gas, LPG expands to 270 times its volume as a liquid. This makes the liquid the ideal way to store and transport LPG.
LPG works as a fuel, providing energy. It works by generating heat for cooking, heating, hot water and as a fuel for vehicles.
Is Butane Heavier than Air - Is Butane Lighter than Air - Is LPG Lighter than Air
Butane is 2.006 times heavier than air, under the same temperature and pressure conditions. Butane has a molar mass of 58.124 g/mol vs 28.97 g/mol for air. So, butane is slightly more than twice the weight of air.
Butane gas relative density is heavier than air. Butane relative density is not lighter than air. Butane weighs 2.5436 kg/m³ whilst air weighs 1.225 kg/m³ (with both 15°C at 1 atm), so slightly more than twice the weight.
LPG (propane gas) is not lighter than air. In fact, LPG is over 50% heavier than air at sea level (1 atm). LPG density (propane density) is 1.55 times heavier than air.
So, LPG (propane) is heavier than air.
As a result, LPG gas, both propane and butane, will settle in low places.