Dataset for a Measurement Campaign of DME Oxidation on Commercial Pt/Pd-Series Diesel Oxidation Catalysts

This article presents data collected during a measurement campaign conducted on a synthetic gas test bench (SGB) at the Chair of Thermodynamics of Mobile Energy Conversion Systems (TME). The campaign includes 23 light-off experiments utilizing five state-of-the-art diesel oxidation catalysts (DOCs) with varying platinum and palladium formulations. The primary objective is to investigate the oxidation behavior of dimethyl ether (DME) and its impact on other reactions within exhaust gas aftertreatment.

Five distinct gas compositions were employed to replicate reduced, model, and realistic conditions for simulating DME and DME/diesel fuel blend exhaust gases. The dataset comprises comprehensive test bench data, including temperature readings, mass flow controller metrics, and gas analytical values. These data are curated primarily for analyzing the light-off temperature ramp, while also encompassing the time frame from pre-conditioning to post-conditioning. This dataset offers valuable insights into DME's oxidation behavior, its co-oxidation effects, and the formation of secondary emissions.

The dataset includes results from 20 experiments across DOCs 1-5 for four different gas matrices:

1. A reduced gas matrix for pure DME oxidation with only O₂.

2. A realistic gas matrix for DME oxidation under actual exhaust gas conditions, incorporating CO, NO, and CO₂ into the reduced mix to simulate DME combustion exhaust.

3. A reduced gas mix for pure DME and propene co-oxidation with only O₂.

4. A realistic gas matrix for DME and propene co-oxidation under genuine exhaust conditions, again integrating CO, NO, and CO₂ to simulate a DME/diesel exhaust scenario.

Additionally, three experiments involving DOCs 1, 3, and 5 are included with gas mixture 5: 

5. This realistic gas mix excludes any hydrocarbons (HC) to assess their influence on NO oxidation.

The datasets follow this nomenclature: DOC_X_GM_Y, where: 

• X indicates the respective DOC number (1-5),
• Y denotes the corresponding gas matrix (GM), ranging from 1 to 5.

The datasets for exhaust gas analytics encompass key components such as DME, O₂, CO, CO₂, NO, along with additional HC species generated during the oxidation process of DME and propene. Notably prominent components include formaldehyde, formic acid, methanol, and nitric oxide; N2 is used as a carrier.