Scavanger For H2s Gas
Zinc Carbonate- sulfide scavenger contains a high‐quality zinc carbonate. The fine particle‐ size‐distribution of zinc carbonate results in a maximum amount of surface area for fast, efficient sulfide scavenging and is effective in water base and oil‐ or synthetic‐base fluids.
Under operating conditions, zinc carbonate reacts with sulfides to form zinc sulfide (ZnS), which has an extremely low solubility in water (0.0096 g/mL).Drilling fluids should not be acidified; otherwise, hydrogen sulfide could be liberated. Zinc carbonate is effective as a scavenger at the pH levels found in drilling fluids. It is recommended that a pH above 10 be maintained whenever H2S is expected. This high alkalinity converts the dangerous H2S gas to less toxic bisulfide (HS‐ ) and sulfide (S2‐) ions. The alkaline pH (>10) allows an extra margin of safety. Is not pH‐ dependent; it is effective at alkaline pH, such as 10 to 11, remove the hazard of dangerous H2S gas escaping to the surface. Reduce the possibility of hydrogen embrittlement occurring on downhole tubulars. Zinc carbonate can be used in oil and synthetic‐ base fluids, but pilot testing is recommended.