In this contribution Artificial Neural Network (ANN) modeling of the hydrocracking process is presented. The input–output data for the training and simulation phases of the network were obtained from the Tehran refinery ISOMAX unit. Different network designs were developed and their abilities were compared. Backpropagation, Elman and RBF networks were used for modeling and simulation of the hyd...

Among the 7 types of natural solvent mixtures listed as third class solvents in the Ordinance on Prevention of Organic Solvent Poisoning, 5 types (134 samples) of petroleum distillate solvents (PDS) were collected from various parts of Japan in 1986 and 1987, and analyzed for n-hexane, benzene and 4 other aromatics by capillary gaschromatography. In addition, 3 samples of turpentine oil, 1 samp...

Ethylene yield is significant in showing the performance of steam cracker furnace olefin plant. This study was conducted actual large-scale plant to see impact various variables towards ethylene yield. The analysis utilizing Regression Analysis Minitab Software Version 18 develop a reliable model. model concluded that studied contributed by factor -0.000901, 0.02649, -0.282, 0.16, -0.0834, 0.12...

A coupled reactor/furnace simulation has been conducted for a 100 kt/a SL-II naphtha cracking furnace containing both long-flame and radiation burners. The computational fluid dynamics approach was used to simulate the flow, combustion and radiative heat transfer in the furnace. The software packages COILSIM1D and SimCO were used to account for the cracking process in the reactor coils. The sim...

A new method for feedstock reconstruction of industrially important hydrocarbon fractions is developed using as input the analytically determined ommercial indices such as the average molecular weight, the specific density, theH/C-ratio, the paraffin, isoparaffin, olefins, naphthenes, aromatics PIONA) weight fractions and a set of ASTM boiling points. The method is based on Shannon’s entropy cr...

Gasoline blending stocks (naphthas) are comprised of normal, iso- and cycloparaffins and aromatic hydrocarbons with carbon numbers ranging from C4 to C12. Heavy straight run naphtha (HSRN, CAS number 64741-41-9) was selected for toxicity screening because substances of this type contain relatively high levels (28%) of cycloparaffins by comparison to other naphtha streams and the data complement...

Low-temperature oxidation (LTO) of four Arabian crudes as well as blends of naphtha with a super-light crude was investigated employing differential thermal analysis. The mass fraction of un-saturates in the reactants varied between 0.2 and 0.9. All reactants showed LTO peaks between 230 and 264 oC; heat flow at the peak, however, varied widely. The data revealed a clear increase in LTO-generat...

Serial extracts of the seeds of M.fragrans were investigated for their anti-diarrhoeal potential in three experimental models. Though all the three extracts exhibited significant activity, the petroleum ether and ethanol extracts were found to be more effective above 200 mg | kg dose levels.