Data · dataset · 2026
Scaling down direct dimethyl ether synthesis for biogas conversion
Listed in UCL Research Data Repository
The feasibility of direct DME synthesis from biogas conversion as a small scale energy storage system was studied.
Description
Anaerobic digestion (AD) of grass silage was used as a feedstock for production of biogas and it was found that grass silage has high affinity for methane enriched biogas. A mathematical model was developed to investigate the effect of operation conditions in reforming of this biogas and it was found that flexible H2/CO ratios can be produced by controlling the O2/H2O ratio.
The syngas produced from the above model was used to develop a mathematical model for direct DME synthesis. The water gas shift reaction was studied over CuO/ZnO/Al203 (CZA) and 1 % Au/CeZr04 catalysts and it was found that the gold based catalysts are superior to the copper based catalysts for low temperature WGS. The kinetics of the WGS reaction over fresh gold based catalyst and the deactivation kinetics model was then studied.
Read the rest (2 more)
It was found that the best fit of the experimental data was the surface redox kinetic model with surface oxidation as rate limiting step and water induced deactivation. Methanol synthesis was studied over a series of catalysts (CZA, Cu/Ce02, CuO/MnO/ZnO, 1% Au/CeZr04 and 5% Pd/AhC^) at different operating conditions: T=200-260 °C, P=20-50 bar, H2/CO molar ratio=2/l, GHSV=2640 mlg'V. It was found that CZA showed the highest activity and there was no effect of addition of gold.
Different solid acid catalysts (NH4ZSM-5, HZSM- 5 or Y-AI2O3) as a dehydration function were physically mixed with CZA for direct DME synthesis from syngas. It was found that the CZA/ HZSM-5 bifunctional catalyst with 0.25 acid fraction showed high stability over a period of 212 hr.
Links
Where it is published
- DOI doi.org/10.17034/32627916.v1 ↗
DOI / persistent id · from rdr ucl ac uk
Catalogue records · 1
- OAI-PMH record api.figshare.com/v2/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Af… ↗
metadata API · from rdr ucl ac uk
Topics
- From keywords
- Earth & Environmental Science
- Inferred from text
- Genome sequencing 65%
Provenance · 1 source records, 6 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| UCL Research Data Repository | oai:figshare.com:article/32627916 | 5 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].local:field:earth-environmental | mapping · rdr ucl ac uk | connector:rdr_ucl_ac_uk@1.0.0 | |
| concepts[modality].local:modality:genome-sequencing | enrichment · rdr ucl ac uk | keyword-concept-rules@1.0.0 | title+description (65%) |
| description | source · rdr ucl ac uk | connector:rdr_ucl_ac_uk@1.0.0 | /metadata/dc/description |
| license_text | source · rdr ucl ac uk | connector:rdr_ucl_ac_uk@1.0.0 | |
| publication_date | source · rdr ucl ac uk | connector:rdr_ucl_ac_uk@1.0.0 | |
| title | source · rdr ucl ac uk | connector:rdr_ucl_ac_uk@1.0.0 | /metadata/dc/title |