Today gas arising naturally, is the most important source of energy.All combustible gaseous compounds from the earth are odorless contain many impurities that affect the density of natural gas.
Such gas is not usual for a human physical characteristics - taste, color, smell - which we are able to determine their availability.And yet, they are characterized by specific parameters, such as density, temperature of combustion, heat of combustion, the composition, the maximum concentration for an explosion, the pressure in the blast.
Among the many important physical characteristics can be said about the density of natural gas.This value, which is calculated as the ratio of weight to its volume and signs formula r = m / V. gas density under normal conditions is in the range of from 0.73 to 0.85 kg / m3.
Properties
gas produced from the field, it consists of methane in the range of 82-98% of the total weight, often mixed with other hydrocarbons.The fuel gas in its composition and also accommodate non-combustible materials: oxygen, carbon dioxide, nitrogen and water vapor.Immediately after pumping gas from the bowels free from toxic hydrogen sulphide, bringing its content to an acceptable 0.02 g / m3.The greatest density of natural gas creates the content of non-combustible mixtures of N2, CO2, H2S or heavy hydrocarbons.The lowest yield methane dry environment.It is well known that the increase in the physical quantity entails raising the temperature of formation of hydrates.Although a small weight and capable of giving hydrates.With the high reservoir pressure in the reservoir gas is liquefied and is called gas condensate field.
Compared with other fuels (solid, liquid) natural gas, the density of which depends entirely on his own composition, is advantageous for several indicators:
- cheap - as a consequence of a much more easy way of production and transportation;
- not formed during combustion ash and solid particles;
- relatively high calorific value;
- no need for preliminary preparation for combustion of natural gas;
- greatly facilitated the work staff;
- significantly improved sanitation workers;
- simplified terms of automation of technical processes.
in life happen when the pressure of gas on the upper floors of the house risks being larger than the lower.This is because a density of air is much greater in comparison with the combustible medium.At the height of the static pressure of air is greatly reduced, and the gas pressure decreases weaker.
Methods for measuring density
density of natural gas is determined by the laboratory.Due to technical and economic feasibility of it is allowed to calculate the following ways:
- hand;
- using tables, graphs, diagrams;
- using computers and automated systems.
most accurate method - putting a test sample in a thin-walled glass cylinder with a further weighed on precision balance.There are also special instruments that measure the density of natural gas.It densitometers most diverse types - vibration, pycnometric, acoustic, areometricheskie, radiation and others.Among them are very famous model Solartron 7812 and Solartron 3098. They are capable of providing a continuous measurement in the flow.Typically, these models are used in commercial systems for gas.
