The analysis of fuel, gas, water, and lubricants . e forany amount from 1 to 6 grams in each 100 cc. as made readyfor the photometer, hence the most convenient procedure willbe to prepare a solution of 30 grams of NaCl in 250 cc. ofwater and use 25 cc. of it in making up the measured amountof standard sulphate to 100. Similarly, the amount of free HClin the 100 cc. volume should be duplicated by adding 2 cc. ofcone. HCl to the 250 cc. solution of NaCl. Some coals, especially of the semi-bituminous or Pocahontas type, havea content of sulphur so low as to make it advisable in such cases to diss
The analysis of fuel, gas, water, and lubricants . e forany amount from 1 to 6 grams in each 100 cc. as made readyfor the photometer, hence the most convenient procedure willbe to prepare a solution of 30 grams of NaCl in 250 cc. ofwater and use 25 cc. of it in making up the measured amountof standard sulphate to 100. Similarly, the amount of free HClin the 100 cc. volume should be duplicated by adding 2 cc. ofcone. HCl to the 250 cc. solution of NaCl. Some coals, especially of the semi-bituminous or Pocahontas type, havea content of sulphur so low as to make it advisable in such cases to dissolvethe fusion in a smaller quantity of water, so that the volume when made upshall be 100 cc. With sulphur so low as per cent the entire solution wouldbe required for use with the photometer. ^ A small 3-volt tungsten bulb with current from two dry cells is used aaa standard light. CHAPTER XXIII Ultimate Analysis of Coal Total Carbon Determination.—The percentage of total carbonin the coal used is a necessary factor in determining the heat. Fig. 43.—Total carbon apparatus. losses in the flue gases as already indicated in the discussion onpages 107-110 inclusive. This value may be obtained by utiliza- 179 180 FUEL, GAS, WATER AND LUBRICATION tion of the sodium peroxide fusion in which the total carbon ofthe coal has been oxidized and combined with chemical to formNa2C03. By liberating the CO2 under accurately determinedconditions as to temperature and pressure b} means of theapparatus shown in Fig. 43, the amount of carbon present maybe derived from the volume of CO2 discharged. The apparatus should be located on a laboratory desk or tablewhere an even temperature can be maintained. Fill the jacketing tube J with water slightly acidulated to keepit clear. Fill the leveling tube L with water that has had 2 or3 cc. of sulphuric acid added. A few drops of methyl orange inthe leveling tube will impart a color to the water, greatly facili-tating the readings. Connect the inl
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectchemist, bookyear1922
