The assembly of a number of individual gas pipettes of the. Hempel type for a special purpose, as in the ordinary Orsat apparatus for flue gas analysis, is familiar. 3 INTRODUCTION To have proper control on combustion process, an idea about complete or complete combustion of fuel is made by the analysis of flue gas. Determination of calorific value of a fuel by Bomb calorimeter. ➢ Flue gas analysis by ORSAT apparatus. ➢ Study of valve timing diagram of Diesel Engine.

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Feedback Privacy Policy Feedback. Now the three way cock is kept in the closed position. Dean—Stark Soxhlet extractor Kipp’s.

Evaporating Petri Syracuse Watch glass. Let x be the excess amalysis supplied per kg of fuel. Then as before, consider 1 kg fuel f,ue contain carbon Chydrogen Hsulphur S and oxygen O and the products of combustion will be. The three-way stop-cock is then closed. Registration Forgot your password? My presentations Profile Feedback Log out. Auth with social network: These methods will be better understood with the help of illustrative examples. Beaker Gas syringe Vial.

This process of sucking and exhausting of gas is repeated times, so as to expel the air from the capillary connecting tubes, etc. The flue gas is expelled by raising the aspirating bottle. Using gzs stopcocks that isolate the absorption burettes, the level. The remainder is N 2 gas.

FLUE GAS ANALYSIS ORSAT APPARATUS. – ppt video online download

This procedure is repeated times to ensure a right sample of the gas taken for analysis. Once this excess oxygen is obtained, then we can find the weight of excess air supplied.

Views Read Edit View history. The same technique is repeated for oxygen, using the pyrogallol, and carbon monoxide using the ammoniacal cuprous chloride.

STEP 2 The stopper of the absorption bulb, containing caustic potash solution, is opened and all the gas is forced into this bulb by raising the water reservoir. The process is repeated to ensure full absorption. Retrieved from ” https: When the volumetric analysis of dry gas is given, then the amount of air supplied per kg of fuel can be obtained by any one of the following methods Carbon content of the fuel is not given directly: The main constituents of the flue gases are carbon dioxide, carbon monoxide, oxygen and nitrogen.


All the air in the reservoir bottle is expelled to atmosphere by lifting the reservoir bottle and opening the three-way to atmosphere. The decrease in volume-gives the volume of CO2 in mL of the flue gas sample.

Chemical Absorption Reaction in orsat apparatus.

Orsat gas analyser

N 2 will depend on this total oxygen required. The aspirating bottle is lowered so that the eudiometer reads zero on graduated scale. From Wikipedia, the free encyclopedia. The other end is provided with a three-way stop-cock, the free end of which is further connected to a U-tube packed with glass wool for avoiding the incoming of any smoke particles, etc.

The eudiometer reading is taken and the difference of two readings gives the percentage of CO 2 by volume in the gas sample.

After leveling the liquid in the bottle and burette, the remaining volume of gas is assumed to be nitrogen and indicates the percentage of carbon dioxide absorbed.

The base of the gas burette is connected to a lrsat bottle to enable readings to be taken at constant pressure and to transfer the gas to and from the absorption media. By means of a rubber tubing arrangement, the gas to be analyzed is drawn into the burette and flushed through several times.

Now consider the percentage analysis of the wet products.

Thereby, weights of all constituents of the flue or exhaust gases are determined and therefore total weight of the gas and then the percentage composition of the gas can be determined. This article is an orphanas no other articles link to it.

The absorption bulbs are filled with their respective solutions to level just below their rubber connections. The burette contains slightly acidulated water with a trace analyais chemical indicator typically methyl appzratus for colouration.


This equation does take into consideration the complete combustion of carbon to carbon dioxide and hence approximation.

Flue Gas Analysis by Orsat Apparatus | Combustion | Thermodynamics

Since one mole of any gas occupies the same volume under the same conditions of temperature and pressure. The three-way stop-cock is now connected to the flue gas supply and the reservoir is lowered to draw in the gas, to be analysed, in the burette. Also indicates the short supply of oxygen for combustion ii if the flue gases contain a considerable amount of oxygen, it indicates the oxygen supply is in excess, though the combustion may be complete.

Each front pipette is provided with number of glass tubes inside to increase the wetted surface area hence it accelerates action of the gas absorption. Lab coat Face shield Respirator Rubber apron Safety shower. An Orsat gas analyser is a piece of laboratory equipment used to analyse a gas sample typically fossil fuel flue gas for its oxygencarbon monoxide and carbon dioxide content.

Aspirating bottle is moved up and down several times to ensure the complete absorption of CO 2 by KOH solution in reagent pipette. This method is very much useful when the composition of the fuel is now known. Share buttons are a little bit lower. Then the chemical equations can be written as.

Although largely replaced by instrumental techniques, the Orsat remains a reliable method of measurement flje is relatively simple to use. We can write the chemical equation by considering a certain moles of fuel and corresponding moles of air such that the analysis of dry products given will be obtained.