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Fouling Reduction in Cooled Reaction Systems

IP.com Disclosure Number: IPCOM000238994D
Publication Date: 2014-Sep-30
Document File: 4 page(s) / 35K

Publishing Venue

The IP.com Prior Art Database

Abstract

Reaction Systems, typically a single or combinations of CSTR and/or PFR along with associated feed and product withdrawal hardware, are often cooled to remove the heat of reaction by contacting the Reactor contents with a cool surface, either the Reactor wall itself or an associated heat exchanger designed for such purpose. In many cases, the reaction system may contain, either by deliberate delivery via one of the feed streams or as a reaction product, species or high molecular weight components that will tend to precipitate or accumulate on the cool surface, resulting in an insulative build-up of foulant that reduces the system’s heat transfer capability. Such condition requires that the cooling surface temperature be lowered to maintain the required rate of heat removal and the rate of fouling subsequently increases. This study demonstrates that for certain systems, particularly those that have been designed to deliver a solid feed component suspended in a high viscosity liquid or emulsion, the components that tend to foul the reaction system can be effectively reduced while maintaining the critical viscosity profile of the liquid portion of the feed system.

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Fouling Reduction in Cooled Reaction Systems

Abstract: Reaction Systems, typically a single or combinations of CSTR and/or PFR along with associated feed and product withdrawal hardware, are often cooled to remove the heat of reaction by contacting the Reactor contents with a cool surface, either the Reactor wall itself or an associated heat exchanger designed for such purpose. In many cases, the reaction system may contain, either by deliberate delivery via one of the feed streams or as a reaction product, species or high molecular weight components that will tend to precipitate or accumulate on the cool surface, resulting in an insulative build-up of foulant that reduces the system's heat transfer capability. Such condition requires that the cooling surface temperature be lowered to maintain the required rate of heat removal and the rate of fouling subsequently increases. This study demonstrates that for certain systems, particularly those that have been designed to deliver a solid feed component suspended in a high viscosity liquid or emulsion, the components that tend to foul the reaction system can be effectively reduced while maintaining the critical viscosity profile of the liquid portion of the feed system.

Background

Reaction Systems as referred to herein can contain any combination of single, series or parallel Continuous Stirred Tank Reactor(s) ("CSTR") or Plug Flow Reactor(s) ("PFR"), the feed and product withdrawal systems, equipment required to remove heat generated by or add heat required by the reaction or to maintain the desired Reactor System heat balance. Reaction Systems are often cooled to remove any heat liberated by the reaction by contacting the Reactor contents with a cool surface. The surface may include either the Reactor wall itself and/or an associated heat exchanger designed specifically for the Reaction System; the reaction heat may be liberated as a result of chemical reaction or complexation of any of the Reaction System feed components.

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