![]() ![]() Results indicate that PdZn particles are more active than Pdº particles for the synthesis of methanol and less active for CH4 formation. A catalyst with 5% Pd and a Pd:Zn molar ratio of 0.25:1 has been identified as the preferred catalyst. By studying the effect of the Pd loading and the Pd:Zn molar ratio the formulation of the Pd/ZnO/Al2O3 catalyst was optimized. Undesirable CH4 formation was observed, however, can be minimized through choice of process conditions and by catalyst design. Increased GHSV’s and H2/CO syngas feed ratios also enhanced DME selectivity. Selectivity to DME increased with decreasing operating temperature, and increasing operating pressure. The Pd/ZnO/Al2O3 catalyst was more » thus further investigated for methanol and DME synthesis at P=34-69 bars, T= 250-380☌, GHSV= 5 000-18 000 h-1, and molar feeds H2/CO= 1, 2, and 3. On the contrary, a Pd/ZnO/Al2O3 catalyst was found to be highly stable for methanol and DME synthesis at 380☌. A commercial Cu/ZnO/Al2O3 catalyst, utilized industrially for the synthesis of methanol at 220-280☌, suffers from a rapid deactivation when the reaction is conducted at high temperature (>320☌). 380☌) are necessary when combining methanol and DME synthesis with a methanol to gasoline (MTG) process in a single reactor bed. Studied were temperatures of operation ranging from 250☌ to 380☌. « lessĪ Pd/ZnO/Al2O3 catalyst was developed for the synthesis of methanol and dimethyl ether (DME) from syngas. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |