gas composition analysis for the two selected days. There is FG analysis of those days. For this reason, anal- yses from three days ago were used and may cause a slight difference in these results. The methane con- tents of natural gas for the two days are also different (96.4% vs 92.6%), which can make a difference in the evaluation. The two selected cases were nor- malised according to all the con- ditions listed above (except for the natural gas composition) and the results were tabulated: • A 9% reduction in extra fuel load (in Mkcal/h) is expected for the same H 2 production. • A 3.5% reduction in the released load of the furnace is expected for the same H 2 production. • For the same H 2 production, a 4.5% reduction in the absorption load of the furnace is expected. • An 8% decrease is expected in the HP steam sent to the refinery for the same H 2 production. • A decrease of approximately 40°C is expected in the bridge wall temperature. • 1.6% increase in H 2 production is expected for the same extra fuel load (increasing SR outlet temperature, same charge amount). • A 4% increase in H 2 production is expected for the same SMR absorb furnace load (increasing SR outlet temperature, same charge amount). • If no normalisation is made under the conditions described for two days, a 1% reduction in extra FG load is calculated. • If no normalisation is made in the conditions described for two days, a 7% reduction in SMR furnace released furnace load is calculated. • If no normalisation is made under the conditions described for two days, an 8% reduction in SMR absorption furnace load is calculated. References 1 WIKIPEDIA, https://en.wikipedia.org/wiki/ Ceramic 2 Jensen et al, High emmissivity ceramic coating of furnace walls in tubular reformers, AlCHe paper, 2014. 3 Aspen Technology Inc., Aspen HYSYS Unit operations Guide, Version 10.
Yahya Aktas is Production Sustainability Manager in Tüpras¸ Izmir Refinery, Turkey. He has 22 years’ refinery experience, mainly in process improvements, product blending, oil metering systems, furnace and boiler combustion control and safety systems, burners, and waste heat boilers, and holds a BSc in chemical Engineering and an MBA. Muammer Sever is Process Superintendent in Tüpras¸ Izmir Refinery, with 20 years’ experience in process improvements, crude oil distillation, Merox process and Isomerisation, furnace and boiler combustion
control and safety systems, burners, waste heat boilers, hydrocarbon loss management, waste water treatment, operations maintenance coordinating (OPC) and energy reduction studies He holds a BSc in chemical engineering and an MBA. Metin Becer is Process Superintendent in Tüpras¸ Izmir Refinery, with 15 years’ experience in both Hydroprocessing and Base Oil Group process and Operational Reliability as well. He holds a BSc in Chemical engineering and a MSc degree as Research Assistant at IYTE University.
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