Scavengers hydrogen sulfide

Hydrogen Sulfide Scavengers. Hydrogen sulfide (H S) can be neutralized by using sodium hydroxide (NaOH) and calcium hydroxide [Ca(OH)j] [213,214]. The reaction is... 

Nesbitt, L. E., et al., Properties of hydrogen sulfide scavengers used in water-based drilling fluids, Proceedings of 36th Annual Technical Meeting of the Petroleum Society, Edmonton, Canada, June 2-5, 1985. 

Thoroughly blend an oil-soluble hydrogen sulfide scavenger into fuel. Let scavenger react for several hours. Analyze fuel for the presence of hydrogen sulfide. 

Treat fuel with an oil-soluble hydrogen sulfide scavenger. 

HighlinkSO . [Hoechst C lanese/ColtH -ants Suif.] Aliphatic dialdehyde hydrogen sulfide scavengers in natural gas and sour crude prod. 

Scavenger 1200. [Western Nutrients] Hydrogen sulfide scavenger for oil drilling muds. 

Environmental and Corrosion Control Effects of Hydrogen Sulfide Scavengers in Oil and Gas Exploration... 

Hydrogen sulfide scavengers are employed in more than one field applications like drilling operations and sweetening processes and the type of a scavenger needed for a particular application strictly depends on whether it can act better in that medium. 

There is a need to develop or source for hydrogen sulfide scavengers, perhaps embodying complanentary mixtures of chemicals or a compound specifically investigated to fit the needs and match more closely the qualities of an ideal scavenger. 

Alan, A. G., Read, R A., and Wilson, R. D. (1999) Evaluation and Field Application of a New Hydrogen Sulfide Scavenger, 10th Int l Oilfield Chemical Symp., Norway, March 1-3, pp. 

Jeffrey, G. C., Cooper, L. A., and Whipple, S. S. (1988) Downhole Hydrogen Sulfide Scavenging in Drilling Mud Using Iron Chelates, US Patent 4756836, pp. 1-4. 

As outlined above, surfactants are added to acids to perform one or more of several needed functions. However, other chemicals are also added to the acid. These additives inclnde corrosion inhibitors [IS], iron control agents [J9, 20], hydrogen sulfide scavengers [21], scale inhibitor [22] and clay stabilizers [23], It is very important to perform compatibility tests of the selected surfactant with the acid formnla, especially in this complex environment. Also, some of the snrfactants are nsed in high temperature and high salinity applications. Therefore, it is necessary to ensure thermal stability of these surfactants nnder these harsh conditions. 

General information. Aqueous solutions of formaldehyde are generally used both as biocides and as hydrogen sulfide scavengers in the oilfield. It is very common for formaldehyde to be used in combination with quaternary ammonium compounds, glutaraldehyde and THPS (see 5.4.7.). Solutions of formaldehyde tend to be inexpensive (relative to the other commonly used biocides), so it continues to be widely used. 

A number of hydrogen sulfide scavenging processes have been developed that make use of the rapid reaction between an aldehyde, such as formaldehyde, and H2S. Typically, the... 

Several attempts have been made to evaluate and compare hydrogen sulfide scavenging processes based on economic analyses. Unfortunately, such studies are of limited value because they are highly dependent on the specific conditions and assumptions used in the study. Also, other factors, such as the environmental acceptability of the reactant and its waste products, operator acceptance of the process, and winterizing requirements, may be more important than cost in selecting a process. The very high rate of process modification, new process development, and removal of existing processes from the market also makes comparative evaluation difficult in this field. 

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