What is LPG gas

What is LPG?

What is LPG (Liquefied Petroleum Gas):

LPG has nothing to do with natural gas (CNG - "Compressed Natural Gas"). Rather, LPG is a mixture of propane and butane liquefied under pressure, which is produced in crude oil and natural gas production and in crude oil refineries. Campers use LPG for heating, cooling and cooking.

Because of its chemical composition (hydrocarbons) it is related to gasoline and - after adapting the engine environment - can be used in gasoline engines. Gaseous at atmospheric pressure, it changes to a liquid state at a maximum of 10 bar (depending on the temperature) and can thus be stored in pressure vessels. DIN EN 589 applies to LPG. With its density quotient of 1.55, it is heavier than air, so it collects on the ground. In itself you can't smell LPG. For this reason, an odorous substance is added so that leaks can be noticed earlier.

Impact on the environment and health:

The emissions of the legally limited pollutants (CO, HC, NOx) are not significantly reduced with LPG engines. But compared to gasoline engines, CO2 emissions are reduced by up to 15 percent. That is two percent more than with diesel and eight percent more than with natural gas operation. Compared to gasoline engines, LPG engines emit fewer legally unlimited pollutants, such as aromatic hydrocarbons (e.g. benzene).

LPG vehicles in garages:


In underground and collective garages there is still a "ban on parking gas vehicles". This has already been repealed in the so-called "Garage Ordinance" of the federal states (GAV = Ordinance on the Construction and Operation of Garages).

Only in Bremen and in Saarland is the hiring ban formally still in effect. According to the Saarland Ministry of the Environment, however, only requirements for adequate ventilation will soon apply. The Senator for Building, Environment and Transport in Bremen has also pointed out that there are no concerns in terms of building law if gas-powered vehicles are parked in garages in a way that deviates from the requirements of the current Bremen Garage Ordinance (BremGaVO). However, the BremGaVO should also be amended soon.

Regardless of this, a garage owner or operator can make use of his house rights and decide for himself which vehicles he allows entry. In the event of a dispute, reference should be made to the new version of the Garage Ordinance, which is not yet widely known.

Tax relief for LPG:

The reduced tax rate for the use of liquid gas as fuel to drive combustion engines in vehicles is 9.7 cents / liter (in accordance with Section 3, Paragraph 1, No. 1.a of the Mineral Oil Tax Act). According to the current legal situation, the tax relief for LPG runs until December 31, 2009. From 2010 the tax rate for one liter of LPG would increase to 22 cents. However, it is quite possible that there will be changes to the Mineral Oil Tax Act in this regard by 2010.