Feed API

Trend the feed API gravity, K factor, and aniline point. Verify any changes in paraffin content of the feed. 

The yields for the various products were given as a function of the properties of the feedstocks and the volume percent conversion. The feedstock properties are the feed sulfur content expressed as a weight percent, the feed API and Watson characterization factor, K. The API is related to specific gravity by the following equation ... 

X = Feed characterization factor X2 = Liquid volume percent conversion X3 = Feed API X4 = Feed sulfur content... 

Data point Feed K LV% Feed API Feed S Actual gasoline Gasoline predicted (Gary) Error% Gasoline predicted (Jones) Error% Gasoline predicted (Maple) Error% Gasoline predicted (this work) Error%... 

Due to its flexible nature, the same ANN architecture can be applied in which the input and output parameters based on the H-Oil units are given in Table 1. There are twenty input nodes, ten from eaeh train (A and B). They cover the fresh and recycle liquid feed rates, feed API, makeup and recycle gas rates, hydrogen partial pressure, reactor pressure, exotherm, reactor average temperature and catalyst addition rate. The model also consists nine hidden and six output nodes. However, the number of nodes in each layer or the inclusion of which process parameters can be modified as occasion arises, such as changes in process requirement, model refinement or data availability. 

Constant defined by Eqnation 3.34 Constant defined by Eqnation 3.36 Ereqnency factor of reaction i j API gravity of the feed API gravity of the gasoil API gravity of the naphtha API gravity of the vacnnm residne Constant dehned by Eqnation 3.35 Constant dehned by Eqnation 3.37 Constant dehned by Eqnation 3.38 Heat capacity of the reacting mixtnre Activation energy of reaction i j Mass how rate of Inmp i ... 

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