Thermal decomposition sodium bicarbonate

The mauve colored cobalt(II) carbonate [7542-09-8] of commerce is a basic material of indeterminate stoichiometry, (CoCO ) ( (0 )2) H20, that contains 45—47% cobalt. It is prepared by adding a hot solution of cobalt salts to a hot sodium carbonate or sodium bicarbonate solution. Precipitation from cold solutions gives a light blue unstable product. Dissolution of cobalt metal in ammonium carbonate solution followed by thermal decomposition of the solution gives a relatively dense carbonate. Basic cobalt carbonate is virtually insoluble in water, but dissolves in acids and ammonia solutions. It is used in the preparation of pigments and as a starting material in the preparation of cobalt compounds. 

Where FW contains bicarbonate or carbonate alkalinity (as calcium, magnesium, or sodium salts), these salts undergo thermal decomposition in the boiler, and the steam-volatile contaminant gas carbon dioxide is introduced into the steam distribution system, as shown ... 

A thermal decomposition reaction is a reaction that is activated by heat or high temperatures and that generates simpler (i.e., containing fewer atoms and thus characterized by lower molecular weights) substances from a single complex substance. The overall balanced equation for the thermal decomposition of sodium bicarbonate reveals the simpler substances produced ... 

Potassium Bicarbonate. Potassium bicarbonate has become available in commercial quantities for food use. The only reason for using it is that the sodium content of the resulting product is reduced. As the molecular weight of potassium bicarbonate is greater (100.11 for KHC03 compared with 84.01 for NaHC03) some 19% more is required to produce the same volume of carbon dioxide. Potassium bicarbonate is also more expensive. The reaction for its thermal decomposition is ... 

A kinetic and microscopic study [47] of the thermal decomposition of solid sodium bicarbonate between 360 and 500 K ... 

U.K., have been pioneers in developing the preparative scale SCTA system described above and investigating its potential to study the thermal behavior of a wide range of materials. The principal advantage of SCTA over conventional TA techniques is that with the former, thermal events can be studied under controlled conditions. A simple example of controlled decomposition is the thermal decomposition of sodium bicarbonate, and SCTGA and TGA curves for this process are shown in Fig. 3. 

Baking soda (sodium bicarbonate) undergoes thermal decomposition as follows ... 

SODIUM BICARBONATE (497-19-8) CHNaOj Noncombustible solid. Aqueous solution is a strong base. Violent reaction with acids evolving carbon dioxide. Violent reaction with finely divided aluminum, fluorine, lithium. Incompatible with organic anhydrides, acrylates, alcohols, aldehydes, alkylene oxides, substituted allyls, cellulose nitrate, cresols, caprolactam solution, epichlorohydrin, ethylene dichloride, isocyanates, ketones, glycols, nitrates, phenols, phosphorus pentoxide, 2,4,6-trinitrotoluene. Forms explosive material with 2,4,5-trinitrotoluene and increases the thermal sensitivity of 2,4,6-trinitrotoluene (TNT) by decreasing the tenqjerature of explosion from 566°F/297°C to 424°F/218°C. Attacks metals. Thermal decomposition at 228°F/109°C, releasing oxides of carbon. 

Sodium bicarbonate undergoes thermal decomposition according to the reaction... 

Data generated using the experimental techniques described above are used to formulate hydrodynamic models that may be used to predict reactor performance. In this section, studies that employ chemical reactions to evaluate mass transfer and contacting efficiency are described. Selected references are shown in Table 7. Dry et al. have applied hot air pulses as a reacting tracer [87]. Chemical reactions used to probe gas phase hydrodynamics include thermal decomposition of sodium bicarbonate, ozone decomposition, coal combustion, and FCC coke combustion. 

---