استفاده از امواج دستگاه مایکروویو برای هضم نمونه‌های نفت‌خام به منظور اندازه‌گیری عناصر فلزی نیکل و وانادیم

نوع مقاله : ترویجی

نویسندگان

1 پژوهشگاه صنعت نفت

2 مسئول پروژه/ پژوهشکده توسعه فناوری های کاتالیست، پژوهشگاه صنعت نفت

چکیده

اندازه‌گیری عناصر فلزی در نفت‌خام با توجه به ارتباط عناصر نفت‌‌خام با خصوصیات و سنگ منشاء نفت از اهمیت بالایی برخوردار است. در این تحقیق نمونه‌های مختلف نفت‌خام از پالایشگاه‌های کشور جمع‌آوری گردید و آماده‌سازی نمونه‌ها به روش هضم با مایکروویو انجام شد و در نهایت مقادیر نیکل و وانادیم نمونه‌ها به‌وسیله دستگاه جذب اتمی کوره گرافیتی اندازه‌گیری شدند. نفت‌‌خام با روش‌های استاندارد نیز هضم شد و در نهایت نتایج حاصل با این روش مقایسه گردید. برای هضم نمونه عواملی از قبیل انرژی دستگاه مایکروویو و زمان مورد نیاز برای هضم کامل نمونه بهینه شدند. انحراف استاندارد نسبی حدود 8/4 درصد و 5/4 درصد به ترتیب برای نیکل و وانادیم و محدوده خطی برای نیکل و وانادیم به ترتیب 100-1/0 میکروگرم در لیتر و 150-0/1 میکروگرم در لیتر به ‌دست آمد.

کلیدواژه‌ها


عنوان مقاله [English]

Measurement of nickel and vanadium in crude oil by atomic absorption spectrometry after microwave digestion of the samples

نویسندگان [English]

  • Yousefali Ghorbani 1
  • Saaeid Soltanali 2
1 پژوهنده ارشد
2 Catalyst Division, Research Institute of Petroleum Industry (RIPI)
چکیده [English]

Measuring the relationship of metallic elements in crude oil and petroleum source rock characteristics is important. The samples were collected in various petroleum refineries and Sample preparation using microwave digestion procedure was performed and the amounts of nickel and vanadium samples by graphite furnace atomic absorption was measured. Crude oil was digested with standard methods and the results obtained with these methods were compared. For sample digestion, factors such as the microwave energy and time required for complete digestion of the sample were optimized in order to have 800 W and 10 minutes. The relative standard deviation of 4.8 and 4.5 per cent and the linear range for nickel and vanadium 0.1 - 100 and 1.0 - 150 micrograms per liter micrograms per liter respectively.

کلیدواژه‌ها [English]

  • Crude oil
  • digestion
  • Microwave
  • GF-AAS
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