Mercury Extraction from crude fluid on Gas Field Offshore Topside Platform

1. Type of forms in which Mercury can be found During
Natural Gas Treatment
Predominantly Elemental Mercury
Mercury Compound
Mercury Removal Principle
Utilization fixed beds of mercury removal materials.
The gas, or liquid, flows through the fixed bed.
The mercury reacts with the reactive reagent in the mercury removal
material and stays in the vessel, while the effluent gas or liquid
hydrocarbon is mercury-free.

2. TYPES OF MERCURY REMOVAL METHODS
Non-Regenerative Mercury Removal:
The process fluids flows continuously through the bed of mercury
sorbent for a number of years. After a long service when the pressure drop
become excessive, the sorbent needs to be replace.

3. Regenerative Mercury Removal:
• Works on the same basis
• Difference is that it is used in conjunction with Dehydrator.
• For utilization of Dehydrator the molecular sieve is replaced
with mercury absorbent.
• So, during operation mercury is sorbed by this absorbent
material bed in dehydrator & gas moves out freely.
• Collection and recovery depends on:
a.) the amount of mercury present in the feed fluid.
b.) on the process conditions in the spent regeneration gas
knockout separator,

4. Regenerative Mercury Removal: