![]() The test gas and the control gas are injected into the gas chromatograph, and the peak area measured at the purification temperature of 360 ° C is the corresponding blank value The test gas and the control gas are measured, the peak area was determined by gas chromatography, and the peak area after subtracting the corresponding blank value was the corrected peak area. Take this product as a test sample Take the gas with methane content of 0.0020% (with nitrogen as diluent) as the control gas, according to Gas chromatography (General 0521) test, A chromatographic column (0.8 x 4mm, 80 mesh) packed with a glass ball The column temperature was 110☌ The inlet temperature was 110dC And the detector temperature was 120☌. Take this product, with hydrogen sulfide detection tube, containing hydrogen sulfide shall not exceed one part per million. Take this product, with phosphine detection tube determination, containing phosphine should not exceed three million. Take this product, with the determination of carbon monoxide detection tube, containing carbon monoxide shall not exceed 10 parts per million. Take 100ml of water, add 0.2 of methyl orange indicator solution, mix well, take 50 M l, put a and B in two colorimetric tubes, put in B tube, add hydrochloric acid titration solution (0,01mi/L) 1.0, shake well In the tube, after the product is 1000ml (speed of 4000ml per hour), the red color should not be deeper than the tube B. Carbon dioxide is nonflammable and can corrode some common metals in the presence of water. At atmospheric pressure, carbon dioxide cannot be present as a liquid, and when the temperature and pressure are above the triple point, but below 31.1 ° C., the carbon dioxide and the gas are in equilibrium in the closed vessel. Carbon dioxide is a weakly acidic gas with a slightly pungent odor at high temperatures. Latent heat of fusion 199kj/kg(-56.6 °c). The critical temperature is 31.1 ℃, the critical pressure is 7382kPa, and the critical density is 468kg/m3. The gas relative density (Air = 1) was 1.21.1 at 101 °c and 522.3kPa, and the sublimation temperature was -101 °c at 78.5.3kPa. It is a colorless and odorless gas at normal temperature and pressure. Is a weak acid gas, with a slight pungent odor at high temperature Non-flammable, liquefied into a colorless and tasteless liquid. Solid carbon dioxide for penicillin production, fish, cream, ice cream and other food storage and low-temperature transport.Ĭarbon dioxide is a colorless and odorless gas at normal temperature and pressure. Liquid carbon dioxide is used in welding, fermentation industry, cooling and cooling beverage, sugar industry, medical local anesthesia, and also used as large cast steel anti-foaming agent, plant growth promoter, anti-oxidant and fire extinguishing agent. Gas carbon dioxide is mainly used as soda ash, fertilizer (ammonium bicarbonate, urea) and synthetic methanol and inorganic salt industry raw materials, also used in steel casting quenching and White manufacturing, also used in the manufacture of dry ice. Solubility in water, gas carbon dioxide solubility 171.3g/cm3 water (0 ℃), the aqueous solution is acidic.Ī large number of used as raw materials such as soda ash, sodium bicarbonate, white lead, urea and ammonium bicarbonate, can also be used as fire extinguishing agent, fresh refrigerant, etc. ![]() ![]() Colorless, odorless, non-combustion, non-combustion, compressed to high-pressure gas.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |