Calcium hydroxide (Ca(OH)2), universally referred to as lime water or slaked lime is formed by reacting hydrated lime (calcium oxide, CaO) with water (H2O)[1]
CaO (s) + H2O (l) ⇌ Ca(OH)2 (aq) (ΔHr = −63.7 kJ/mol of CaO)
Calcium hydroxide is an economically favorable alkaline reagent to neutralize acid as it yields 2 moles of (OH)2 for every 1 mole of Ca(OH)2 (which is slightly soluble in water) when compared to sodium hydroxide [1] and it may separate from the solution ‘constant agitation must be done to prevent the separation since calcium salts are normally quite insoluble [2].
Calcium hydroxide is a fine, powdery hexagonal crystalline with bitter alkaline taste and a molar mass of 74g/mol. It has a melting point of 580 ºC, density and solubility 2.2 g/cm3 and 0.160 g/100 g H2O at 20°C respectively [3]. …show more content…
[4]. Studies show that the use of lime water in large systems is ideal as calcium oxide is the cheapest reagent [5]. Resources to carry out this project are easily accessible as 90% of all equipment required is in our pilot plant. The success of this project will depend on how efficient the scrubbing of SO2 will be and most importantly ‘how much it will cost per ton of SO2 produced. Currently, spends R168, 000.00 per 30m3 of 47% (w/w) caustic. The use of calcium oxide will be approximately R102, 000.00, a saving of R66, 000.00 can be
CaO (s) + H2O (l) ⇌ Ca(OH)2 (aq) (ΔHr = −63.7 kJ/mol of CaO)
Calcium hydroxide is an economically favorable alkaline reagent to neutralize acid as it yields 2 moles of (OH)2 for every 1 mole of Ca(OH)2 (which is slightly soluble in water) when compared to sodium hydroxide [1] and it may separate from the solution ‘constant agitation must be done to prevent the separation since calcium salts are normally quite insoluble [2].
Calcium hydroxide is a fine, powdery hexagonal crystalline with bitter alkaline taste and a molar mass of 74g/mol. It has a melting point of 580 ºC, density and solubility 2.2 g/cm3 and 0.160 g/100 g H2O at 20°C respectively [3]. …show more content…
[4]. Studies show that the use of lime water in large systems is ideal as calcium oxide is the cheapest reagent [5]. Resources to carry out this project are easily accessible as 90% of all equipment required is in our pilot plant. The success of this project will depend on how efficient the scrubbing of SO2 will be and most importantly ‘how much it will cost per ton of SO2 produced. Currently, spends R168, 000.00 per 30m3 of 47% (w/w) caustic. The use of calcium oxide will be approximately R102, 000.00, a saving of R66, 000.00 can be