Triazine Vs. Non-Triazine for H2S Treatment

When choosing the appropriate H2S Scavenger either for oil treatment, acid gas sweetening, mercaptan odor removal or through mechanical processes, it is essential to fully analyze the different alternatives on the market, as different products are better suited for different applications and process conditions. As our analysis will show, one may be better than the other depending on the specific conditions of what needs to be treated. Over the years, triazine-based treatment has been the go-to solution for many Producers, Midstreamers, and Refiners, and to a large extent it is still the go-to choice. But for some, implementing new technology such as non-triazine products has positively impacted their operations and has lowered their costs. Is one better than the other? That all depends on your use case and process conditions. Here you’ll find a brief description of both triazine and non-triazine alternatives to help inform you of the effective solutions on the market for your application.


Triazine Treatment

Triazine for H2S scavenging is an established and reliable chemical reaction that is employed in the Oil & Gas industry to remove H2S from gas streams. The H2S scavenging can be done via direct injection in pipelines with fog nozzles, wet scrubbers, or bubble towers at either wells, central batteries or midstream systems. The triazine scavenging technique is most cost-effective for gaseous streams with sulfur loading of less than 1000 lbs. per day. It typically reduces H2S concentrations to <4 ppm and partially removes several light mercaptans (methyl, ethyl, and propyl). Triazine’s ability to remove H2S is affected by various parameters, including temperature, pH, contact duration, and natural gas composition. The final product is water soluble and is usually discharged in the produced water tanks and commercial saltwater disposal facilities. 


It is important to note that using triazine as an H2S scavenger may cause fouling from the polymerization of dithiazine in contact towers, scrubbers and/or pipelines. Careful use and monitoring of the triazine solution is needed to ensure smooth operation. Q2 Technologies has been manufacturing traditional triazine blends for decades and also offers expertise in developing unique formulas for special cases. 


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Non-Triazine Treatment

Even though triazine is a well-trusted solution, many companies have chosen non-triazine-based scavengers as alternatives for use in crude oil applications. One of the main characteristics of our non-triazine product, Pro3®, is a non-amine and non-glyoxal technology, making it safe for refineries and pipelines. If left unchecked, Amine salts that form from spent triazine can ultimately cause damage to the top stacks of a refinery when heated to >500 °F. Many refiners in the US Gulf Coast and overseas monitor amine content and require traders and midstream companies to use vetted non-triazine chemistries. 


Producers and Midstream companies alike have found success with our non-triazine products: 

  • The quality of the oil is upgraded when H2S content is reduced. 
  • Safer environment for all personnel on-site.
  • Infrastructure and equipment will last longer now that corrosion caused by H2S has been neutralized. 
  • Our non-triazine scavengers are not based on commodity-priced products, so our prices are protected and are less impacted by external factors such as freezes and industrial raw material shortages.


Our non-triazine H2S removal technology has proven to reduce chemical use up to 50-75% as compared to triazine. This definitely does not mean that triazine should always be replaced by non-triazine, rather, Q2 Technologies can assist you from a technical, engineering, and commercial viewpoint. Each application is different and needs to be carefully analyzed to determine the treatment product. 


In conclusion, both triazine and non-triazine scavengers have their benefits and are the go-to alternatives for oil and gas treatment. But, one may be better than the other depending on the specific characteristics of the product that needs to be treated. If you’re looking for the right H2S scavenger solution for your company, feel free to contact us! 




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