4TH International Congress on Technology - Engineering & SCIENCE - Kuala Lumpur - Malaysia (2017-08-05)

Nitrogen Compounds Characterization In Dumai Heavy Kerosene Oil From A Blend Of Indonesian Crudes

Color instability of heavy kerosene (HK) from Refinery Unit II Dumai occurred and caused problem during end product blending at long-distance facilities. Refinery Unit II Dumai processes a blend of Indonesian crudes (Duri, Banyu Urip and Sumatra light crude). Nitrogen compounds are suspected for causing color instability in Dumai HK fraction. A pre-concentration nitrogen compound in HK fraction was carried out by distillation. Color is measured by colorimeter using ASTM Method D 1500. Total nitrogen compounds in HK are measured by total nitrogen total sulphur (TNTS) analyzer. Compounds are identified by Fourier transform infrared (FTIR) spectroscopy, UV-Vis spectrometry, and gas chromatography - mass spectrometry (GC-MS). From these experiments, nitrogen compounds in the form of amine compound have been found out to be a factor causing the color instability in Dumai HK fraction. Simulation using High Troughput Micro Reactor, a potential problem solving for color instability of HK Dumai, was conduct to mimic the process at Distillate Hydro treating (DHDT) Unit using existing feed and catalyst. The process was run with variation of temperatures. The concentration of sulphur and nitrogen of each product is measured. The products were retained and analyzed its color from day one until day 30. The highest temperature condition delivered product with lowest nitrogen concentration in heavy kerosene product and the most stable in color. It was achieved at process condition LHSV 5,1 hour-1, pressure 35 bar, RIT 340 oC. Keywords: nitrogen compounds, Dumai heavy kerosene, Indonesian crude, color stability
Indah Kurniawaty, Masputra Agung, Agustina Eliyanti, Yoki Yulizar