Details

Autor(en) / Beteiligte

• Qi, Guozhen
• Xie, Zaiku
• Yang, Weimin
• Zhong, Siqing
• Liu, Hongxing
• Zhang, Chengfang
• Chen, Qingling

Titel

Behaviors of coke deposition on SAPO-34 catalyst during methanol conversion to light olefins

Ist Teil von

• Fuel processing technology, 2007-05, Vol.88 (5), p.437-441

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The deposition of coke on SAPO-34 during methanol conversion to olefins at temperatures of 623–823 K was observed to be fast initially but moderate in the later stage. Micropores are blocked badly at coke contents of above 4 wt.%. The coke deposition influences olefins selectivity significantly and selectivities of ethylene plus propylene reach maximum at a coke content of about 5.7 wt.%. The coke formation can be attenuated by the presence of water, but the effect of water weakens gradually with the progress of the reaction. A model relating the coke content over SAPO-34 to cumulative amount of methanol fed to the catalysts is proposed and proved the validity to estimate the coke content on SAPO-34 at different reaction conditions. The coke deposited at different reaction temperatures has different compositions.