An experimental study on single-step dimethyl ether (DME) synthesis from hydrogen and carbon monoxide under various catalysts

Men Han Huang, How Ming Lee, Kuo Chao Liang, Chin Ching Tzeng, Wei Hsin Chen

研究成果: Article

22 引文 斯高帕斯(Scopus)

摘要

Dimethyl ether (DME) is a potential and green substitute to diesel and liquefied petroleum gas. In this study, DME synthesized from hydrogen and carbon monoxide (i.e. syngas) through a single step process is investigated to figure out the reaction characteristics. The influences of reaction temperature, H2/CO molar ratio, and prepared catalyst on DME synthesis are investigated, while the space velocity is fixed at 15,000 mL (gcat h)-1. The results indicate that the optimal reaction temperature for DME synthesis develops at 220 °C where the chemical kinetics and thermodynamic equilibrium are in a comparable state. Increasing H2/CO ratio increases the CO conversion but lowers the H2 conversion. The maximum DME yield is 2.3 g (gcat h)-1 which occurs at H2/CO = 1. The addition of palladium (Pd) into a Cu-ZnO-Al2O3 catalyst intensifies the CO conversion and DME yield of a gas mixture with syngas and 10 vol% of CO2. This is the consequence of hydrogen spillover which is able to increase the stability of active Cu against CO2 oxidation. The results also suggest that the dehydration catalyst with higher acidity gives lower DME selectivity and yield. The higher the CO2 concentration in syngas, the lower the CO conversion and DME yield. The present study has provided comprehensive insights into DME synthesis which is conducive to DME production in industry.

原文English
頁(從 - 到)13583-13593
頁數11
期刊International Journal of Hydrogen Energy
40
發行號39
DOIs
出版狀態Published - 2015 十月 19

    指紋

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

引用此