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Electrical Heating of Catalyst Support Structure to Enhance PrOx Activity

IP.com Disclosure Number: IPCOM000206081D
Publication Date: 2011-Apr-13
Document File: 1 page(s) / 47K

Publishing Venue

The IP.com Prior Art Database

Abstract

An electrical source is connected to the metal support for a PrOx reactor to provide a uniform source of heat across the reactor.

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Title:

Electrical Heating of Catalyst Support Structure to Enhance PrOx Activity

Abstract:

An electrical source is connected to the metal support for a PrOx reactor to provide a uniform source of heat across the reactor.

 

Discussion:

In current fuel processing systems, the PrOx reactor is typically heated with external band heaters for startups, regenerations, and heat maintenance. Band heaters result in temperature gradients from the outside of the FPS to the middle of the catalyst section and it is sometimes difficult to provide enough heat to raise the catalyst temperature during nitrogen purges.

Directly connect the metal support structure for the PrOx reactor to an electrical source, turning the support into an in situ heater.  This is intended to provide more uniform heating.

Benefits:

There are several benefits to this approach of electrically heating the PrOx support structure internally:

[1] Adjustment of the temperature profile across the reactor. The amount of heat can be varied across the reactor so that the catalyst surface temperature can be maintained or increased, especially in the front of the bed.

[2] Improvement of PrOx decay. For the Pt/Ru catalyst, deactivation decreases with increasing temperature. But in an adiabatic reactor at high linear velocities (> 0.5 m/s), increasing the inlet temperature to avoid decay results in too high of an adiabatic exit temperature that leads to undesireable reverse water gas shift activity. By maintaining the catalyst at...