Treated Rhizophora mucronata tannin as a corrosion inhibitor in chloride solution

Treated Rhizopora mucronata tannin (RMT) as a corrosion inhibitor for carbon steel and copper in oil and gas facilities was investigated. Corrosion rate of carbon-steel and copper in 3wt% NaCl solution by RMT was studied using chemical (weight loss method) and spectroscopic (FTIR) techniques at various temperatures in the ranges of 26–90C. The weight loss data was compared to the electrochemical by the application of Faraday’s law for the conversion of corrosion rate data from one system to another. The inhibitive efficiency of RMT was compared with commercial inhibitor sodium benzotriazole (BTA-S). The best concentration of RMT was 20% (w/v), increase in concentration of RMT decreased the corrosion rate and increased the inhibitive efficiency. Increase in temperature increased the corrosion rate and decreased the inhibitive efficiency but, the rate of corrosion was mild with RMT. The FTIR result shows the presence of hydroxyl group, aromatic group, esters and the substituted benzene group indicating the purity of the tannin. The trend of RMT was similar to that of BTA-S, but its inhibitive efficiency for carbon-steel was poor (6%) compared to RMT (59%). BTA-S was efficient for copper (76%) compared to RMT (74%) at 40% (w/v) and 20% (w/v) concentration respectively. RMT was efficient even at low concentration therefore, the use of RMT as a cost effective and environmentally friendly corrosion inhibiting agent for carbon steel and copper is herein proposed

Application of biopolymer schizophyllan derived from local sources in Malaysia for polymer flooding operation

After the application of primary and secondary recovery methods, a significant amount of oil gets left behind in the reservoir. Thus, Enhanced Oil Recovery (EOR) methods are the only viable options. Polymer flooding has been widely used for many years. The ability of a polymer to sustain high temperature and salinity reservoir conditions, while taking into account the cost of the polymer, is a challenging aspect of its application in polymer flooding. Due to the forthcoming environmental regulation, the eco-friendly biopolymers have been gaining importance. This study aims to investigate the biopolymer schizophyllan produced utilizing locally and cheaply available sources in Malaysia for its rheological property at various range of biopolymer concentration. Also, the effect of aging at high temperature on the biopolymer viscosity was studied. A core flooding experiment was also performed utilizing a Berea sandstone core at an 80?°C reservoir temperature and a salinity of 90,000?ppm. The rheological studies showed a shear thinning behavior at all biopolymer concentrations. The effect of aging up to a period of 6 months exhibited insignificant decrease in biopolymer viscosity. Core flooding experiments using the biopolymer derived from local sources showed an incremental oil recovery of 17.25% after waterflooding

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Data from: Treated Rhizophora mucronata tannin as a corrosion inhibitor in chloride solution

Treated Rhizopora mucronata tannin (RMT) as a corrosion inhibitor for carbon steel and copper in oil and gas facilities was investigated. Corrosion rate of carbon-steel and copper in 3wt% NaCl solution by RMT was studied using chemical (weight loss method) and spectroscopic (FTIR) techniques at various temperatures in the ranges of 26-90ºC. The weight loss data was compared to the electrochemical by the application of Faraday's law for the conversion of corrosion rate data from one system to another. The inhibitive efficiency of RMT was compared with commercial inhibitor sodium benzotriazole (BTA-S). The best concentration of RMT was 20% (w/v), increase in concentration of RMT decreased the corrosion rate and increased the inhibitive efficiency. Increase in temperature increased the corrosion rate and decreased the inhibitive efficiency but, the rate of corrosion was mild with RMT. The FTIR result shows the presence of hydroxyl group, aromatic group, esters and the substituted benzene group indicating the purity of the tannin. The trend of RMT was similar to that of BTA-S, but its inhibitive efficiency for carbon-steel was poor (6%) compared to RMT (59%). BTA-S was efficient for copper (76%) compared to RMT (74%) at 40% (w/v) and 20% (w/v) concentration respectively. RMT was efficient even at low concentration therefore, the use of RMT as a cost effective and environmentally friendly corrosion inhibiting agent for carbon steel and copper is herein proposed

Corrosion rate vs tannin concentration for carbon steel.

<p>Corrosion rate vs tannin concentration for carbon steel.</p

FTIR spectra for RMT.

<p>FTIR spectra for RMT.</p

Corrosion rate vs Optimum Tannin Concentration of copper at 26°C, 50°C and 90°C.

<p>Corrosion rate vs Optimum Tannin Concentration of copper at 26°C, 50°C and 90°C.</p

Corrosion rate vs tannin concentration for copper.

<p>Corrosion rate vs tannin concentration for copper.</p

Copper specimen surface after corrosion test for 2 weeks period.

<p>(a) Without Treated Tannin Presence (b) With Treated Tannin Presence.</p

Carbon steel specimen surface after corrosion rate test for 2 weeks period.

<p>(a) Without Treated Tannin Presence (b) With Treated Tannin Presence.</p