MAXSCAV™ : New low cost high performance H2S scavenging chemistry
Dorf Ketal has discovered new technology for improving performance of non-regenerative H2S scavenging chemistries. The new technology is now available to reduce the cost and improve the efficiency for most of the chemistries used in applications ranging from upstream production and transport to crude oil refining and finished product transport e.g. asphalt/bitumen.
MEA-triazine is the most commonly used chemistry for applications requiring a non-regenerative H2S scavenger. Other chemistries are available (MMA-triazine, Glyoxal, zinc-based, iron-based, and others) but MEA-triazine has the highest market share because it is the lowest cost in use solution. Triazines are low cost in use despite the fact that the molar efficiency of the chemistry in capturing H2S is significantly below theoretical maximum efficiency.
Quaternary ammonium compounds accelerate the reaction between MEA-triazine and H2S to improve molar efficiency. But significant inefficiencies remain, including excess cost, increased pH and scale formation and increased problems in downstream refining which may include decreased desalter performance and elevated risk of overhead corrosion.
MAXSCAV™ is new technology that dramatically increases the molar efficiency of MEA-triazine and other chemistries including MMA-triazine, Glyoxal and zinc-based scavengers. The reduction in MEA-triazine required to scavenge the H2S offers potential to decrease line item expense by up 25% to 50%. The reduction in over-dosage of the chemical can also reduce the cost of scale formation and downstream refining problems.