THERMODYNAMIC MODELING SYNTHESIS GAS PRODUCTION IN THE STEAM-METHANE REFORMING TO DETERMINE THE OPTIMAL RATIO OF H2/CO IN FISCHER-TROPSCH REACTION

سال انتشار: 1394
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 465

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شناسه ملی سند علمی:

JR_ARJ-1-9_002

تاریخ نمایه سازی: 26 اسفند 1394

چکیده مقاله:

Steam-methane reforming is one of the ways production hydrogen and carbon monoxide gases as feedstock in the Fischer-Tropsch reactions. Ratio of hydrogen to carbon monoxide input to feed in Fischer-Tropsch reaction is very important for the production of valuable products such as ethylene,propylene and combustible materials. As a result, there is high demand for these materials in order to develop new technologies with lower costs.Thermodynamic modeling of H2 and CO produced in the reforming reaction (CH4/H2O=2/3) has been carried out by Gibbs free energy minimization atthe temperatures range of 500-1500˚K and pressures of 1-20atm. The results showed that at different pressures and at high temperatures (1000-1500˚K)production of hydrogen and carbon monoxide increases and the ratio of H2/CO reaches to desired value. At temperatures higher than 1200˚K and in all pressure ranges (1-20atm), the ratio of H2/CO values will be fixed and increasing pressure will not have much impact on the value of this ratio. Favorable conditions to determine the optimal ratio of H2/CO for the Fischer-Tropsch reaction and more production of hydrogen and carbon monoxide gases were obtained at the temperature range of 1000-1200˚K and low pressure (1atm).

کلیدواژه ها:

Fischer-Tropsch ، synthesis gas ، steam-methane reforming ، Gibbs free energy minimization method

نویسندگان

Jaber Gholizadeh

Department of Chemical Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran.

Hosein Atashi

Department of Chemical Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran.

Farshad Farshchi Tabrizi

Faculties of Chemical Engineering-Oil & Gas, University of Shiraz, Shiraz, Iran.

Jaber Tayebi

Department of Chemical Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran.