Patent ID: 6546720
Filing Date: 2003-04-15
Classification: B01D,F01N,F02D,Y02A,Y02C,Y02T

Abstract:
A method for controlling an amount of a first substance to be added to a reaction with at least a second substance in the reaction, such method being used to reduce one of the second substance in the reaction, the product of such reaction along with un-reacted portions of the substances being directed to a sensor, such sensor producing an output signal in response to detection of un-reacted portions of the first and un-reacted portions of the second substance, such method comprising:(a) changing the amount of the first substance added to the reaction; (b) measuring whether the output signal increases or decreases with the changed amount of the first substance; (c) determining from the measurement whether the sensor is responding to the un-reacted portions of the first substance or to the un-reacted portions of the second substance; and (d) adjusting the amount of the first substance to the reaction in accordance with the determination.