Your Power & Plant Chemistry Hub

The technical papers in this issue address practical challenges in power and plant chemistry and operation.

The first article demonstrates that the pH attainable in ammonia-conditioned high-purity feedwater is fundamentally constrained by the coupled ammonia-carbon dioxide system and by the temperature that the deaerator can safely sustain. The contribution of this work lies not in the development of new thermodynamic relationships, but in the integration of established carbonate chemistry with practical deaerator operating constraints into a single engineering framework. In this framework, feedwater pH control, carbon dioxide removal, and deaerator operating limits cannot be treated independently, but must instead be considered as a single coupled engineering problem. As a result, pursuit of higher feedwater pH through ammonia dosing alone may ultimately become constrained not by chemistry, but by the mechanical limits of the deaerator system itself.