Dataset for DME oxidation behavior of commercial Pt/Pd-series diesel oxidation catalysts

TL;DR

This paper provides a dataset on how commercial diesel oxidation catalysts handle DME and DME/diesel blends in simulated exhaust conditions.

Contribution

The study introduces a new dataset from 23 experiments on DME oxidation behavior using Pt/Pd-series catalysts under varied gas conditions.

Findings

The dataset includes temperature, flow, and gas composition data from 23 light-off experiments.

Gas compositions were tailored to simulate both pure DME and DME/diesel blend combustion scenarios.

Post-processing methods enabled accurate gas concentration calculations at the catalyst inlet.

Abstract

This article presents data collected during a measurement campaign on a synthetic gas test bench (SGB) from the Chair of Thermodynamics of Mobile Energy Conversion Systems (TME). The measurement campaign consists of 23 light-off experiments. Five state-of-the-art diesel oxidation catalysts (DOCs) with varying platinum and palladium formulations were used. The objective of this study is to gain insight into the oxidation behavior of dimethyl ether (DME) and its influence on other reactions during exhaust gas aftertreatment. A total of five distinct gas compositions were utilized in order to emulate both reduced and model conditions, as well as realistic conditions for the simulation of DME and DME/diesel fuel blend exhaust gas. DME simulates the slipped hydrocarbon emission for a pure DME combustion in an internal combustion engine and Propene is incorporated as a constituent in order to simulate the combustion of a DME/diesel fuel blend.

The dataset presented in this article encompasses comprehensive test bench data, including temperature readings, mass flow controller metrics, and gas analytical values. This data has been curated primarily for analyzing the light-off temperature ramp, with additional processing conducted to establish benchmark values for light-off behavior. The datasets also encompassing the time frame from pre-conditioning to post-conditioning. Post-processing of the SGB data allows for the calculation of gas concentrations at the catalyst inlet. Measured gas analytics have undergone zero-point and time corrections to account for drift and gas flow runtime variations. The analysis of exhaust gases includes measurements of fundamental components expected during complete oxidation. The diverse array of exhaust gas analyzers that also captures additional hydrocarbon species associated with secondary reaction pathways and intermediates. The data provided in this article offers valuable insights to researchers and industry professionals regarding the oxidation behavior of DME, its co-oxidation effects, and the formation of secondary emissions.

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