کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
211495 | 461770 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Behaviors of coke deposition on SAPO-34 catalyst during methanol conversion to light olefins Behaviors of coke deposition on SAPO-34 catalyst during methanol conversion to light olefins](/preview/png/211495.png)
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.
Journal: Fuel Processing Technology - Volume 88, Issue 5, May 2007, Pages 437–441