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Advanced Process Control and Optimization: Their Role in Fuel Reformulation Disclosure Number: IPCOM000217175D
Publication Date: 2012-May-04
Document File: 17 page(s) / 2M

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  ARES and CHING-WE1 KOUNG e M.W Kellogg Company

Houston, Ix

  in configuration and objectim cess control (APC)and optimiza-

tion systems to he@the mjnermeet the newchal- h g e sof refonnulatedfuels ispresented.First, a

reuieuj and analysis of how APC will be aflected @ the newfuel requirements ispresmted. n ereviewand analysis is done

based on the threeprocesses that are the m i nsources of

 the reformulatedgasoline (RFG) pool.A similar analysis

 foroptimization, including btend- ing, is also included.Final&, a dis-

 cussion of the c u m tstatus and future development needs of three areas that support and play an important role in theperformance of APC and optimization



systems ispresmted.

   APC and on-lineoptimizationsystems have become commonly accepted by the rejning indus- try as useful andproductive toolsfrom an economic and operational standpoint.Fmm an economic standpoint, they huveproven to be a source of considerable benefits by allowing opwa- tion closer to qualityspecifications and constraints. From an operational standpoint, they have increased operationjkzbility and safety by simpli- bing the operator's tasks and giving the operator greater understanding of theprocess and its opera- tion.

    As a result of the new gasoline and diesel requirernepzts resultingfmm tbe amendments to the 190Clean Air Act, rejnmnowface broader and stricter specificationsfor tbeirproducts.At the same time, toughemuimnmen&d rqulations have lim- ited the operating ranges andjikxibility of some of the refinery units. To better meet these mchal- lenges, APC and optimizationsystem will have to be adapted or reconjgured to attain newcontrol objectives related to the newfuel requirements.

   Certain areas related to APC and optimiza- tion will have to befurtherdeveloped.Inparticular on-line stream analysis, inferential m e a s u m t techniques, and steady state modeling will have to be improved to help meet the mchallenges. In this newenvimnment, APC and optimization systems will cease being tools to increaseproductivity and become essential to the refineryoperation.

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Figuro 1. Rodoction in Standard Dowidon asa Result of APC Syrhma

other available measurements will be needed. For optimization systems, accurate steady state modeling tools that can predict

' ith implementationof the 1990 amendments to the Clean Air Act (CAA), gasoline and diesel have to meet a new set of specifications. These specifications are dictated through the simple model from January 1,

1993to March 1997.After 197,the complex model will be applied to determine compliance.

    In accordance to the EPA simple model, RFG will have to meet the following specifications:

Total dbfin content


22.0 vol% maximum


2W0F maximum


8.1 psi maximum in the north

7.2 psi maximum in the south

4.0 vol% maximum

2.0 wf??~


    Similarly for diesel, the new regulations specify maximum sulfur of 0.05 Who,

           maximum aromatics of 35 vol%, and minimum ceta...