ПРОБЛЕМЫ КОРРОЗИИ В ТРУБОПРОВОДАХ ДЛЯ ТРАНСПОРТИРОВКИ СО2 И МЕТОДЫ ИХ РЕШЕНИЯ

POTENTIAL CORROSION ISSUE IN CO2 PIPELINE AND THE SOLUTION OF THIS PROBLEM

Carbon capture and storage (CCS) from the source or power plant will help in reducing the emission of CO2 from the atmosphere with the means of transporting the gas through the pipeline from the captured sources or power plant to storage sites underground or for enhanced oil recovery (EOR). Pipeline is the most reliable option for large scale of CO2 transportation. However, these pipes are oil and gas pipelines and are made of carbon steel in accordance with their specifications and standards that must take in to consideration properties such as strength and toughness. Flue gases has some contaminant or impurities, which affect the mechanical and chemical properties of the pipeline system during transportation. This paper examines various contaminants such as CO2, H2S, CO, NOx, SOx, and H2O in carbon dioxide transmission pipelines with a particular focus on assessing how the contaminants causes corrosion in the pipeline and also considered materials that can be used as alternative to carbon steel for CO2 transportation pipeline. The materials examined ranges from weldable 13 % Cr super modified martensitic stainless steel, 22% Cr duplex and 25 % Cr super duplex stainless steel, 316L clad pipe or Lined carbon steel and nickel alloy, and some parameters in materials selection were examined. The alternative materials considered are 13 % Cr super-modified martensitic stainless steel, and 25 % Cr super-duplex stainless steel. Corrosion of carbon steel tested in a CO2 stream containing low levels of water and the impurities H2S, SO2, NO2 and O2 at a temperature of 25°C and a pressure of 99 bar. Results of the experiment demonstrated that the impurity limit could be increased from 10 ppmv to 20 ppmv without introducing undesirable reactions. A non-destructive imaging technique presented in this paper comprises the parallel application of both neutrons and γ rays, leading to three different final illustrations of a given sampler to identify different carbon-steel thicknesses. Read together, these yield a more comprehensive and faster representation of the inner structure of steel.