Polysaccharides Are Effective Inhibitors of Natural Gas Hydrate Formation

Abstract

This review covers the types and applications of chemical inhibitors of gas hydrate formation in the oil and gas industry. The main directions of the development of new types of highly effective and environmentally safe “green” kinetic hydrate inhibitors (KHIs) based on biopolymers are analyzed. The structure, physicochemical properties, efficiency of gas hydrate formation inhibition, and commercial prospects of polysaccharides in preventing and controlling the formation of gas hydrates are considered. The criteria for their selection, current experimental data, and the mechanism of inhibition are presented. Recent research in the development of cost-effective, efficient, and biodegradable KHIs for industrial applications in the oil and gas industry is also presented.

Exploring the Efficacy of Polysaccharides as Green Corrosion Inhibitors: A Comprehensive Review

“…A wide array of polysaccharides derived from different natural sources have been explored for their corrosion inhibiting properties. Some of the noteworthy polysaccharides used in corrosion inhibition include [ 22,85–89 ] : Starch : Starch is a carbohydrate polymer composed of glucose units linked by glycosidic bonds. It is abundantly found in plants, especially in grains like corn, wheat, and rice.…”

Comparing the Kinetic Hydrate Inhibition Performance of Linear versus Branched Polymers

“…They all have very poor KHI performance when tested alone and under typical field conditions. They may be affecting the gas mass transport by increasing the viscosity, which will slow the rate of hydrate formation. − Even grafting acrylamide or other purely hydrophilic monomers does not improve the performance significantly for gas hydrate systems because you need amphiphilic groups such as those found in VCap or NIPMAm to be added . Branched polycitramides were shown to give good KHI performance but only when suitably large (C3–C6) alkyl groups were attached to the amide groups …”