OTHER GAS ANALYSIS INSTRUMENTS
Flue Gas Analyzers
Gas Purity Testers
Hydrogen Sulfide Apparatus
Gas Analysis in Brief
In analyzing a gas mixture by absorption and oxidation methods, the components of the mixture are determined by a systematic measurement of changes in gas volume. The volume changes are effected by the successive removal of certain components by treatment with selective liquid absorbing reagents and by reacting the combustible components with oxygen.
Absorption and oxidation techniques are applied in large part to mixtures containing some or all of the following components:
|Gases determined by Absorption||Gases determined by Oxidation||Gases determined by Difference|
|Carbon Monoxide||Carbon Monoxide|
Products of Oxidation include carbon dioxide and water vapor. The latter condenses and the volume of the gas sample contracts proportionately. The carbon dioxide and the contraction are measurable and the values are used in percentage calculating formulas.
Absorptions are carried out in either contact pipettes or in bubbler pipettes and the decrease in gas volume as the absorptions are successively made is a direct measure of the volume of the particular component present.
Oxidation is accomplished by means of catalyst and copper oxide tubes. The combination permits the separation of all combustible components since methane and ethane are burned in the catalyst tube and hydrogen or hydrogen and carbon monoxide in the copper oxide tube.
With the catalyst tube alone the following separations may be made:
Methane and ethane
Total Hydrocarbons and hydrogen
Total Hydrocarbons and carbon monoxide
Carbon monoxide and hydrogen
Usually it is preferable to determine carbon monoxide by absorption, using the catalyst for hydrocarbons and hydrogen. When it is necessary to separate methane and ethane with hydrogen present the copper oxide tube is used for the latter. (In this case carbon monoxide may be determined along with hydrogen)
Methods and techniques are fully discussed in the Burrell Manual for Gas Analysis included with each instrument.
SELECTION OF APPARATUS
Apparatus for the analysis of gases by absorption and combustion methods are divided into two general types, Laboratory and Portable. Generally , Laboratory Models are more precise, while portable models are smaller more compact and easier to manipulate.
Knowing the general character of the gas mixture or mixtures to be analyzed and the degree of accuracy required, a selection can be made from our standard instruments. If, however, the standard assemblies are not suitable for you application -- the Burrell Build-Upô design offers a simple medium for grouping any particular assortment of glassware and accessories that will suit your requirements.
Flue Gas Analyzers: Cabinet Models
The Flue Gas Analyzers are designed especially for the analysis of flue or stack gases, but may be used wherever three gaseous components are to be determined by absorption. Each unit is equipped with three full-sized absorption pipettes and a 100 ml. burette; and is generally used to determine carbon dioxide, oxygen, and carbon monoxide. When it is necessary to analyze for hydrogen and hydrocarbons, Junior models are recommended.
The Cabinet models have removable front
and rear panels and a large, comfortable, leather handle.
With the panels removed the glassware is is in front of the case, not obscured by sides and top.
Flue Gas Cabinet Model VR -- Burrell Gas Apparatus.
Supplied with 3 ea - 40-130 Burrell contact pipettes, 1 ea- 39-990 gas
measuring burette, 1 ea - 39-810-10C flushing manifold, all mounted in the
Burrell wood carrying case. Without solutions.
Flue Gas Cabinet Model VRS -- Burrell Gas Analysis Apparatus
Supplied with 2 ea - 40-105-10 BeTe Auto-Bubbler pipettes, 1 ea -40-130
Burrell Contact pipette, 1 ea - 39-990 gas measuring burette and 1 ea -
39-810-10C flushing manifold, all mounted in the Burrell wood carrying
case. Without solutions.
Flue Gas Allied Model - Burrell Gas Analysis Apparatus
Mounted in a wood carrying case. This compact analyzer - is an efficient
instrument for flue gas analysis and similar purposes. Supplied with 3 ea -
40-130 Burrell Contact pipettes, 1 ea - 40-010 gas measuring burette and
1 ea - 39-880 non-flushing manifold. Without solutions.
Purity Testers: Cabinet Models
Burrell Gas Purity Testers are designed to determine impurities in oxygen and hydrogen. Supplied with No. 40-000 gas burette (100ml capacity with a 94 ml. ungraduated, center positioned bulb, the upper and lower stems of 3 ml. capacity each are graduated in .04 ml.) and the absorption or combustion assembly suited to the gas to be analyzed.
Electrolytic hydrogen may contain oxygen as an impurity and electrolytic oxygen may contain hydrogen. Nitrogen will be the principal contaminant of Oxygen produced form liquid air.
Hydrogen - In testing hydrogen for oxygen, a rapid method is to use Model VE, wherein the sample is passed into a Burrell Auto-Bubbler pipette, filled with Oxsorbent.
Also, the same test may be made using Model VO, wherein the sample is passed through the catalyst tube, which will cause any oxygen present to combine with its molecular equivalent of hydrogen. The percentage of oxygen is calculated from the volume reduction of the sample.
Oxygen - Liquid air oxygen may be tested by absorbing all of the oxygen in ammoniacal copper solution, using Model VG. Any residual gas is assumed to be Nitrogen.
Electrolytic oxygen, which may contain hydrogen, is tested with Model VO. Here, the sample is passed through the catalyst tube where any hydrogen combines with oxygen. The reaction results in a contraction in the volume of the sample. From the amount of the contraction, the percentage of hydrogen is calculated.
Oxygen and Hydrogen - Model VP combines all the equipment in one apparatus for testing liquid air oxygen and electrolytic hydrogen and oxygen.
There is a large capacity pipette for ammoniacal copper solution, for determining the purity of liquid air oxygen; a Burrell Auto-Bubbler for electrolytic hydrogen; and a Perma-Therm II catalytic assembly for hydrogen or oxygen.
Gas Purity Tester Model VE - For determining small amounts of oxygen in electrolytic hydrogen.
Supplied with No. 40-000 purity burette and No. 40-105 Burrell Auto-Bubbler pipette. Mounted
in a wood carrying case. Without solutions.
Gas Purity Tester Model VG - For determining the purity of oxygen produced from liquid air.
Supplied with No. 40-150 large capacity pipette, filled with copper turnings, and a No. 40-000
purity burette. Mounted in a wood carrying case. Without solutions.
Gas Purity Tester Model VO - For determining the purity of electrolytic oxygen or hydrogen.
Supplied with No. 40-373 Perma-Therm II (115V) catalytic heater and 40-000 purity burette.
Mounted in a wood carrying case. Without solutions.
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