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01540 Impact of Ammonium Chloride Salt Deposition on Refinery Operations

Picture for 01540 Impact of Ammonium Chloride Salt
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Product Number: 51300-01540-SG
ISBN: 01540 2001 CP
Author: Philip R. Petersen, Ph.D., Arthur de Jong, William F. Minyard, and John L. Sigmon
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Fouling and consequent underdeposit corrosion caused by ammonium salts, especially ammonium chloride, have serious impact on the reliability of operation of various process units. Fouling of tower trays can result in the loss of throughput, changes in the vapor pressure and endpoints of product streams, increased pressure drop in the tower, and corrosion of the trays. Salt deposition on heat exchanger tubes causes a decrease in heat transfer efficiency, increased pressure drops, and corrosion. This paper will discuss the causes of ammonium chloride fouling, methods to help prevent and/or mitigate the fouling, and provide several case histories demonstrating the effects of using ammonium chloride dispersants to clean existing ammonium chloride deposits and to help prevent deposition of this salt.
Fouling and consequent underdeposit corrosion caused by ammonium salts, especially ammonium chloride, have serious impact on the reliability of operation of various process units. Fouling of tower trays can result in the loss of throughput, changes in the vapor pressure and endpoints of product streams, increased pressure drop in the tower, and corrosion of the trays. Salt deposition on heat exchanger tubes causes a decrease in heat transfer efficiency, increased pressure drops, and corrosion. This paper will discuss the causes of ammonium chloride fouling, methods to help prevent and/or mitigate the fouling, and provide several case histories demonstrating the effects of using ammonium chloride dispersants to clean existing ammonium chloride deposits and to help prevent deposition of this salt.
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Ammonium Chloride Corrosion in the Refining Industry

Product Number: 51317--9574-SG
ISBN: 9574 2017 CP
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This paper summarizes key case studies where Ammonium Chloride (NH4Cl) corrosion was observed. Best practices for process control and corrosion mitigation strategies have been recommended based on the learnings from these failures.

 
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01543 DESIGN CONSIDERATIONS TO MINIMIZE AMMONIUM CHLORIDE CORROSION IN HYDROTREATER REAC'S

Product Number: 51300-01543-SG
ISBN: 01543 2001 CP
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Picture for 10359 Prediction, Monitoring, and Control of Ammonium Chloride Corrosion in Refining Processes
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10359 Prediction, Monitoring, and Control of Ammonium Chloride Corrosion in Refining Processes

Product Number: 51300-10359-SG
ISBN: 10359 2010 CP
Author: Adan Sun and Deyuan Fan
Publication Date: 2010
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 This paper presents a recent effort to further minimize the threat of corrosion by wet ammonium chloride salt.  Includes advances in  fundamental understanding salt behavior, predictive mdeling,  integration of models with process and operations.
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