Triazines (Hexahydrotriazines) are one of the most used H2S scavenger chemistries in the North American oil and gas industry, specifically MEA triazines. The chemistry and application methods are well known due to over 2 decades of use, it has gained a commodity status and is thus a highly cost effective H2S treatment solution. Currently it offers one of the lowest cost per mass of H2S removed available in the market. There are however risks when using triazines, one being the formation of polymeric solids. This is mainly due to “overspending” the Triazine (over exposure of the dithiazine to H2S). The term “over spent” was commonly referred to the creation of Trithianes. Recent studies have shed more light on the triazine reaction pathways and provided a more realistic approached to solids formation.4 

This paper will focus on the use of MEA triazines in static and dynamic systems, specifically co-current and counter-current flooded dynamic contact towers, and how solids form in them, what can be done to reduce or eliminate solids formation and design suggestions for systems that has far lower fouling risks. The solutions and suggestions discussed in this paper comes from field experience with these systems.

Subject
Materials, Turbulent flow, Saturation, Solids, Triazines, Scrubbers, Polymerization, Gas velocity, Density, Liquids, Bubbling, Towers, Fouling
Keywords:
MEA Triazine, H2S Removal, H2S Scavenging, Contact towers, Triazine solids, Triazine fouling, Dithiazine, Scavenger towers, Amorphous polymeric dithiazine, bubble towers
© 2022 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2022
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.