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Computational fluid dynamics simulations of platinum hydrogen catalyst with application in heavy-duty combustion engines - Cold start emission reduction
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School of Engineering |
Master's thesis
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en
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48
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This thesis investigates the use of catalytic hydrogen combustion (CHC) over platinum as a method to preheat intake air in heavy-duty internal combustion engines (ICEs) during cold-start conditions. The aim is to reduce emissions while supporting the transition toward zero-emission vehicles. Using the CFD software STAR-CCM+, a detailed surface reaction mechanism was implemented to simulate CHC in a single channel of a commercial monolithic catalyst.
A series of parametric studies were conducted to evaluate the influence of key design and operational variables, including channel density, catalyst length, air-to-fuel equivalence ratio (𝜆), and inlet temperature. Results show that hydrogen conversion is highest when the catalyst is longer and the mixture is richer.
In all cases, a high hydrogen conversion is achieved—a promising result that nonetheless requires validation and further investigation to be confirmed.