Future of the Alkali Industry

1 Here are some standard thermochemical data relevant to lime burning (limestone can be taken to be pure, solid CaCOs in its calcite form)  

2 (o) Prom the data of Appendix C, show that dolomite is thermodynamically more stable than an equimolar mixture of calcite (CaCOs) and magnesite (MgCOs) at ambient temperature. 

3 Calculate the overall Ca and Si contents (expressed as CaO and Si02) of a Portland cement clinker that has 55% alite, 30% belite, 5% alumi-nate phase, and 10% ferrite (assume ideal compositions for the latter two). Would you expect this to behave as a fast or a slow setting cement  

4 Could the waste from a fluidized-bed limestone/coal furnace (Section 8.5) be used in Portland cement composites What possible problem(s) might arise  

6 A mercury chloralkali cell was found to require a current of 37.2 kA in order to produce 1 metric ton of caustic soda per day. 

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