Is there any equation to calculate oxygen release rate or oxygen storage rate as a function of temperature for rich and lean condition, respectively?

17 December 2022 3 2K Report

I have engine data to calculate oxygen storage capacity of three way catalyst for lean and rich condition with varying temperature (in transient condition). I need to calculate oxygen release rate or oxygen storage rate as a function of temperature for rich and lean condition, respectively. Is there any equation for it or how do I calculate it?

Kindly, see the attach file for available experimental data with me.

Muhammad Zohaib Safdar

There is no single equation that can be used to calculate the oxygen release rate or oxygen storage rate as a function of temperature for rich and lean conditions, as this depends on a number of factors including the specific gas storage system being used, the composition and pressure of the stored gas, and the temperature and pressure conditions under which the gas is being released or stored.

In general, the oxygen release rate or oxygen storage rate can be influenced by a variety of factors, including:

Composition of the stored gas: The oxygen content and pressure of the stored gas can impact the rate at which oxygen is released or stored.

Temperature: Changes in temperature can alter the pressure and volume of the stored gas, affecting the rate of oxygen release or storage.

Pressure: Changes in pressure can impact the rate of oxygen release or storage by affecting the flow of gas into and out of the storage system.

Storage system design: The design of the storage system, including the size and shape of the storage vessel, the materials used in its construction, and the presence of any valves or regulators, can also impact the rate of oxygen release or storage.

Given the complexity of the factors that can influence the oxygen release rate or oxygen storage rate, it is not possible to provide a single equation that can be used to calculate this for all conditions and systems. Instead, the specific rate for a particular system will typically need to be determined through experimental measurements or numerical simulations.

Manohar Prasad

Thank you for your answer Muhammad Zohaib Safdar !

Here, I am interested to know the oxygen storage/release rate of ceria based compounds during the catalytic process in lean/rich conditions.

Muhammad Zohaib Safdar

The oxygen storage/release rate of ceria-based compounds can vary depending on the specific composition of the material, the reaction conditions, and the nature of the catalytic process. In general, ceria-based compounds are known to exhibit high oxygen storage capacity and rapid oxygen release rates, which can be beneficial for catalytic processes under lean/rich conditions. However, the specific rate of oxygen storage/release will depend on the specific details of the system under consideration.

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