Saturday, 5 November 2016

Propane

                                                                    Propane

 1) Physical properties
       Propane is a type of alkane that consists of three carbon and has the molecular formula of C3H8 .Propane is also a type of gas, at standard temperature and pressure, but compressible to a transportable liquid. It has both low melting and boiling point, that is -305.8 °F and -43.7°F . It also has a critical temperature of 206.6°F . Propane has a low melting and boiling point because they are simple molecular substances that consists of molecules in which the atoms are joined by strong covalent bonds. However, the molecules are held together by weak forces causing it to have a low melting point.
Image result for molecular structure of propane

                                                Structural formula of propane

 2) Chemical properties 
 Propane undergoes chemical reaction such as combustion such as other alkanes. In the 
presence of oxygen, propane burns and produce by products such as carbon dioxide and water. 

The equation is as below:


                                               C3H8+5O2       3CO2 + 4H2O+ heat
                                      
Propane combustion is much cleaner than gasoline combustion, though not as clean as natural gas combustion. The presence of C–C bonds, plus the multiple bonds of propylene and butylene, create organic exhausts besides carbon dioxide and water vapor during typical combustion. These bonds also cause propane to burn with a visible flame.  

    3) Uses of propane
            Propane has many uses. As it has low melting point, it is a popular choice of   barbecues and portable stoves, makes it vaporized as it is released from its presuuredrized container. Propane is also a popular home fuel and backup electrical generation in sparsely populated areas that do not have natural gas pipelines. Not to mention also that propane is also a type of domestic and industrial fuel in rural areas such as North America. Propane are also used as fuels for motor vehicles. Primary fuel for hot air balloons is propane. Theme parks also used propane for special effects because it is cheap and easy to get anywhere. High energy explosion in movie industry also use propane as their main source.

4) How propane was manufacture by industries

a. Propane manufacture involves separation and collection of the gas from its petroleum sources. Propane and other liquefied petroleum gases are isolated from petrochemical mixtures in two ways, that is by separation from the natural gas phase of petroleum and by refinement of crude oil. 
b. The mixture of hydrocarbon which separated into crude oil and 'wet' gas  is then piped out into a gas trap, containing three type of substance, that is natural gasoline, liquefied petroleum gases and natural gases. 
c.  Crude oil will sink because it is heavier and will later pumped into an oil storage tank for refinery.  It will undergo various chemical reaction such as catalytic cracking, crude distillation and others The "wet" gas comes off the top of the trap and is piped to a gasoline absorption plant, where it is cooled and pumped through an absorption oil to remove the natural gasoline and liquefied petroleum gases.
d.  Hydrocarbons are boiled off and the hydrocarbon mixture is known as "wild gasoline". The "wild gasoline" is pumped to stabilizer towers and the natural liquid gasoline is removed from the bottom and a mixture of liquefied petroleum gases is drawn off the top. 
e. This mixture of LP gases, which contain about 10% of total gas mixture, can be used as a mixture or further separated into its three parts—butane, isobutane, and propane .

Propane


                                         Manufacture process of propane

 5) Health risk exposure of propane    
  It is not dangerous when someone inhaled small amount of propane but when someone inhaled too much of propane, they may suffer from nausea and heart beat increases, making the heart to pump more frequently to pump more oxygen to all parts of body.  Lack of oxygen may damage organs such as lungs and brain. Direct eye contact with the liquefied gas can chill or freeze the eyes.   
Permanent eye damage or blindness can result. Quickly move victim to an area that has fresh air when he or she was exposed to too many  propane gas. Direct skin contact with the liquefied gas may lead to numbness, prickling and itching. A burning sensation and stiffness will be feeled by someone. The skin may become waxy white or yellow.