Zero Waste Logo The Zero Wate Network the University of Texas at Arlington Center for Environmental Excellence Environmental Training Institute Logo  

Join Us on:

Social Network Nav Bar

Lean and P2 Workshops

10/13/15 - 10/15/15

South Houston
11/10/15 - 11/12/15

New Orleans





Environmental Management Systems Workshops

Albuquerque, NM
05/12/15 - 05/15/15

Galveston, TX
07/28/15 - 07/31/15

Austin, TX
09/22/15 - 09/25/15

Arlington, TX
11/17/15 - 11/20/15



Case Study Database

           Add Story    |    Search Case Studies    |   


Valero Refining

Year Submitted: 2003

Process: Slurry Deashing

Industry: Petroleum Refining

Wastes Reduced: Catalyst

Location: Corpus Christi TX

No. of employees: 485

Contact: Allan Schoen

Phone: (512) 289-3288


Analysis of wastes generated at the refinery revealed that catalyst fines were entrained in the slurry oil manufactured by Valero's fuidized catalytic cracker unit (FCCU). The solids would settle in the product tanks consuming tank space. Residue from the tanks had to be removed and disposed of annually.

P2 Application:

The Slurry Deashing Project (SDAP) was designed to remove catalyst fines from Valero's fuidized catalyst cracker slurry oil. The SDAP sends residue back to the FCCU where the catalyst fines are recycled, reducing purchase of make-up catalyst. The main thrust of the project included preventing frequent cleaning of residue from the product tanks and disposal of the residues.

Environmental Benefits:

The average, annual generation of residue prior to SDAP was about 3,000 tons/yr. Since implementing the project the average residue generation has been about 400 tons/yr. Reducing the rate of residue deposition means that the tanks need to be cleaned out less frequently.

Details of Reductions

Additional Information :

The SDAP project significantly reduced the frequency of clean outs where tanks had to be taken out of service. It increased the storage capacity of the tanks, and it reduced purchases of fresh catalyst. The projected payback of the project is 2.5 years.

Source: TCEQ

SHEP Shield
Health and

ERP Shield

ESP Shield

EMP Shield

Attend a workshop and
earn credits toward a
Professional Certification



The Zero Waste Network is one of eight Pollution Prevention Resource Exchange P2RxCenters , serving as a national network of regional information centers: NEWMOA (Northeast), WRRC (Southeast), GLRPPR (Great Lakes), ZeroWasteNet (Southwest), P2RIC (Plains), Peaks to Prairies (Mountain), WSPPN (Pacific Southwest), PPRC (Northwest). We are a proud member of the National Pollution Prevention Roundtable.

National P2 Roundtable Logo
michael kors online outlet michael kors factory outlet online store michael kors outlet canada michael kors outlet online michael kors factory outlet fake michael kors bags cheap mk bags michael kors handbags clearance wholesale jordans jordans outlet cheap jordans china cheap authentic jordans cheap real jordans cheap jordans free shipping cheap jordans online discount jordans cheap jordans from china cheap air jordans louboutin pas cher louboutin soldes louboutin pas cher louboutin soldes air max pas cher air max femme pas cher air max pas cher roshe run pas cher air max one pas cher air max femme pas cher sac michael kors pas cher sac michael kors pas cher sac longchamp pas cher longchamp soldes sac longchamp pas cher longchamp pas cher moncler outlet moncler outlet moncler outlet