| Title: |
Dimethyl ether enrichment effects on the characteristics and emissions of biogas laminar diffusion flame |
| Authors: |
Fareh Saifeddine; Hadef Amar; Mameri Abdelbaki; Aouachria Zeroual |
| Source: |
Next Energy, Vol 11, Iss , Pp 100538- (2026) |
| Publisher Information: |
Elsevier |
| Publication Year: |
2026 |
| Collection: |
Directory of Open Access Journals: DOAJ Articles |
| Subject Terms: |
Diffusion flame; Strain rate; Mixture DME/biogas; NO reaction pathways; Energy industries. Energy policy. Fuel trade; HD9502-9502.5; Renewable energy sources; TJ807-830 |
| Description: |
Biogas is a sustainable energy source that contributes to the closed carbon cycle by reducing greenhouse gas emissions. Nevertheless, concerns exist over its emissions, NO, and CO. This study investigates the potential of blending biogas with dimethyl ether (DME), an eco-friendly fuel, to enhance combustion characteristics and reduce emissions. Numerical analysis was conducted on DME/biogas blends (30%–60%) in a laminar diffusion flame under atmospheric pressure, considering the chemical effects of CO2 in biogas. The addition of DME expands the reaction zone and flame thickness, increasing fuel consumption. Adding DME slightly increases the NO emission index, at a rate of 0.02 (g-NO / kg-fuel) per 10% DME increment. It significantly reduces the CO emission index, which decreases by 16–20 (g-CO / kg-fuel). 50:50 DME/biogas blend provides the optimal trade-off between NO and CO emissions. The analysis reveals that the NNH and thermal routes are the dominant contributors to NO production, and their influence increases upon DME addition. The N2O and prompt routes have minimal impact. Adding DME improves NO consumption through the Chi-reburning sub-pathway, involving HCCO and CHi=1–3 radicals, partially compensating for the increase in thermal and NNH routes / NOx. More DME reduces CO production by inhibiting the forward reaction HCO + M => H + CO + M. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
http://www.sciencedirect.com/science/article/pii/S2949821X26000281; https://doaj.org/toc/2949-821X; https://doaj.org/article/ae3fdf9bf6bf40f2acbf54cb5e85bc93 |
| DOI: |
10.1016/j.nxener.2026.100538 |
| Availability: |
https://doi.org/10.1016/j.nxener.2026.100538; https://doaj.org/article/ae3fdf9bf6bf40f2acbf54cb5e85bc93 |
| Accession Number: |
edsbas.55DA5842 |
| Database: |
BASE |