Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Use GIVING24 at checkout to save 20% on eCourses and books (some exclusions apply)!

Thinning Of Inlet Piping To Reactor Effluent Air Condenser [REAC] Of Gas Oil Hydrotreating Unit - Case Study

Thinning of Inlet Piping to Reactor Effluent Air Condenser [REAC] Of Gas Oil Hydrotreating Unit - Case Study
Available for download

Gas Oil Hydrotreating Unit uses a catalytic hydrotreating process employing a selective catalyst and a hydrogen-rich gas stream to decompose organic sulfur, oxygen and nitrogen compounds contained in the feed. The products of these reactions are the contaminant free hydrocarbon, along with H2S and NH3. Other Treating reactions include halide removal and aromatic saturation. Reactor effluent is cooled in series of Combined Feed Exchangers followed by REAC for product separation. The reactor effluent system is prone for corrosion and fouling due to salting of NH4HS and NH4Cl. Most of the failure analysis studies and literature available in public domain regarding reactor effluent corrosion deals with the corrosion in the REAC and its outlet piping.

Product Number: 51322-18007-SG
Author: Sudharsanan Soundararajan
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings
$0.00
$20.00
$20.00

During a turnaround inspection of a Gasoil Hydrotreater, severe metal loss was observed in the Reactor Effluent Product Condenser Inlet piping. The thickness loss was on the straight horizontal piping portion downstream of continuous wash water injection point. Metal loss is confined to top portion i.e., 10 to 2 o’clock position of the piping only. Corrosion rates in excess of 1mm/year were noticed. The unusual observation was that there was no significant thickness loss at point of water injection or immediate downstream piping, but loss was predominantly on straight portion after 5 directional change. Process simulation, Ionic Equilibria modelling and Computational Fluid Dynamics (CFD) study of the REAC inlet system was performed. This paper explains how the location of wash water injection and type of injection device has influenced the corrosion in the REAC inlet piping. Based on the study, it was identified that stratification of flow and inadequate scrubbing of reactor effluent vapor by wash water has led to HCl/NH4Cl corrosion. Subsequently it was recommended to shift the wash-water injection location to vertical section of the piping and to change the injection type from quill to spray nozzle 

During a turnaround inspection of a Gasoil Hydrotreater, severe metal loss was observed in the Reactor Effluent Product Condenser Inlet piping. The thickness loss was on the straight horizontal piping portion downstream of continuous wash water injection point. Metal loss is confined to top portion i.e., 10 to 2 o’clock position of the piping only. Corrosion rates in excess of 1mm/year were noticed. The unusual observation was that there was no significant thickness loss at point of water injection or immediate downstream piping, but loss was predominantly on straight portion after 5 directional change. Process simulation, Ionic Equilibria modelling and Computational Fluid Dynamics (CFD) study of the REAC inlet system was performed. This paper explains how the location of wash water injection and type of injection device has influenced the corrosion in the REAC inlet piping. Based on the study, it was identified that stratification of flow and inadequate scrubbing of reactor effluent vapor by wash water has led to HCl/NH4Cl corrosion. Subsequently it was recommended to shift the wash-water injection location to vertical section of the piping and to change the injection type from quill to spray nozzle 

Product tags
Also Purchased
Picture for 97490 CORROSION OF REACTOR EFFLUENT AIR COOLERS
Available for download

97490 CORROSION OF REACTOR EFFLUENT AIR COOLERS

Product Number: 51300-97490-SG
ISBN: 97490 1997 CP
Author: Anil Singh, Craig Harvey, R. L. Piehl
$20.00
Picture for Failure Analysis of Reactor Effluent Air Cooler (REAC) in a Hydrocracker Unit
Available for download

Failure Analysis of Reactor Effluent Air Cooler (REAC) in a Hydrocracker Unit

Product Number: 51314-3730-SG
ISBN: 3730 2014 CP
Author: Surajit Ghosal
Publication Date: 2014
$0.00

A major fire in a Reactor Effluent Air Cooler (REAC) of the Hydrocracker Unit (HCU). Visual inspection was made on the failed portion. Metallurgical investigation, macrostructural and microstructural analysis, Scanning Electron Microscopy, and Energy Dispersive x-ray Spectroscopy was conducted on the failed air cooler.
Picture for Failure of Hydrocracker First Stage Reactor Effluent Exchanger Due to OD Under Deposit Corrosion
Available for download

51314-4207-Failure of Hydrocracker First Stage Reactor Effluent Exchanger Due to OD Under Deposit Corrosion

Product Number: 51314-4207-SG
ISBN: 4207 2014 CP
Author: Musaed AL-Arada
Publication Date: 2014
$0.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support