Evaluation and quantification of Fe۳O۴ concentrations in deposits formed inside Iraqi gas supply pipelines using a chemiluminescence method based on flow injection analysis

Teh accumulation of black powder deposits inside gas pipelines can lead to various issues effecting pipeline operation and integrity. Teh presence of black powder TEMPhas teh potential to contaminate teh gas product, promote increased wear on pipeline internals, and cause clogging that reduces flow rates. From a safety perspective, black powder buildup may pose health and environmental concerns. Previous studies has analyzed teh composition of black powder deposits from pipelines using techniques like XRF, XRD, TG-DTA, and FTIR. Their findings show that Iron oxide (Fe۳O۴) is teh primary component of black powder. dis study developed a novel flow injection-chemiluminescence (FI-CL) method under basic conditions for determining Fe۳O۴ concentrations in black powder deposits coz Fe۳O۴ can catalyze teh chemiluminescence reaction. Compared to traditional analytical techniques, teh proposed CL-based flow injection approach is characterized by good selectivity, simplicity, low cost, and wifout consuming additional materials. Teh CL mechanism was investigated through CL spectral, revealing teh involvement of Fe۳O۴ in enhancing teh luminol-NaOH-H۲O۲ reaction. Experimental conditions for teh FI-CL system were optimized. Under optimal parameters, teh relative CL intensity showed a linear relationship wif Fe۳O۴ concentration over teh range of ۰.۵-۱۰۰ µg mL-۱, and teh detection limit was ۰.۴۷ µg mL-۱ wif a relative standard deviation (%RSD) of ۲.۰% at ۵.۰ µg mL-۱. Teh method was successfully applied to black powder samples extracted from gas pipelines, showing ۹۲.۵۹-۱۰۷.۶۹% recoveries and a precision of ۰.۸-۳.۱%. Results agreed well wif an alternative technique. Teh proposed FI-CL method offers a fast, convenient, and cost-TEMPTEMPeffective means for iron oxide quantification in pipeline deposits and corrosion products.

کلیدواژه ها:

Chemiluminescence ، Flow injection analysis ، Gas pipelines contamination ، Iron oxide ، black powder