Irreversible reaction

Lime slaking

Direction: Irreversible
Processes: 3
Stated as: Fixed conversion, Stoichiometry only
Heat of reaction: ΔH = -64,270 kJ/kmol (one process)
Heat of reaction: ΔH = -64,300 kJ/kmol (2 processes)
Element balance: Checked: balances in all 3 processes

As the processes state itStoichiometry, conversions, heats of reaction and catalyst windows are taken from each process's files with their provenance. The build checks only that each process's equation balances in every element, from the process's own component formulas; it does not check the numbers. A process's design maturity applies to them.

Species

Species	Name	CAS	Role	Coefficient
CaO	Calcium oxide	1305-78-8	reactant	-1
H₂O	Water	7732-18-5	reactant	-1
CaH₂O₂	Calcium hydroxide	1305-62-0	product	1

In the processes

Alumina by the Bayer process (3000 t/d smelter-grade alumina, concept)Concept · not reviewed
SLAKE · Lime slakingCaO(s) + H2O(l) → Ca(OH)2(s)
Stated as
Fixed conversion
Element balance
Balances in every element
Conversion
100 % of CaO (assumed: complete slaking (D-004))
Heat of reaction
ΔH = -64,270 kJ/kmol at 298.15 K, as written (assumed: formation enthalpies Ca(OH)2(s) -985.2, CaO(s) -635.1, H2O(l) -285.83 kJ/mol (NBS tables))
Bleached softwood kraft pulp with chemical recovery (1000 ADt/d market pulp, concept)Concept · not reviewed
SLAKE · Lime slakingCaO + H2O → Ca(OH)2
Phase
mixed
Element balance
Balances in every element
Heat of reaction
ΔH = -64,300 kJ/kmol at 298.15 K, as written (assumed: formation enthalpies Ca(OH)2(s) -985.2, CaO(s) -635.1, H2O(l) -285.8 kJ/mol (NBS tables))
Soda ash by the Solvay ammonia-soda process (1000 t/d light ash, concept)Concept · not reviewed
SLAKE · Lime slakingCaO(s) + H2O(l) → Ca(OH)2(s)
Stated as
Fixed conversion
Element balance
Balances in every element
Conversion
100 % of CaO (assumed: complete slaking (D-006))
Heat of reaction
ΔH = -64,300 kJ/kmol at 298.15 K, as written (assumed: formation enthalpies Ca(OH)2(s) -985.2, CaO(s) -635.1, H2O(l) -285.8 kJ/mol (NBS tables, D-007))

Sources

What the processes cite for this reaction, each source once: for the reaction itself, its conversion, its heat of reaction or its catalyst. As the processes write them; DOIs, US patent numbers and web addresses are linked.

complete slaking (D-004)
For the conversion · cited by Alumina by the Bayer process (3000 t/d smelter-grade alumina, concept)
formation enthalpies Ca(OH)2(s) -985.2, CaO(s) -635.1, H2O(l) -285.83 kJ/mol (NBS tables)
For the heat of reaction · cited by Alumina by the Bayer process (3000 t/d smelter-grade alumina, concept)
formation enthalpies Ca(OH)2(s) -985.2, CaO(s) -635.1, H2O(l) -285.8 kJ/mol (NBS tables)
For the heat of reaction · cited by Bleached softwood kraft pulp with chemical recovery (1000 ADt/d market pulp, concept)
complete slaking (D-006)
For the conversion · cited by Soda ash by the Solvay ammonia-soda process (1000 t/d light ash, concept)
formation enthalpies Ca(OH)2(s) -985.2, CaO(s) -635.1, H2O(l) -285.8 kJ/mol (NBS tables, D-007)
For the heat of reaction · cited by Soda ash by the Solvay ammonia-soda process (1000 t/d light ash, concept)