این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
صفحه اصلی
درباره پایگاه
فهرست سامانه ها
الزامات سامانه ها
فهرست سازمانی
تماس با ما
JCR 2016
جستجوی مقالات
یکشنبه 27 مهر 1404
Iranian Journal of Chemistry and Chemical Engineering
، جلد ۴۰، شماره ۶، صفحات ۱۷۶۵-۱۷۷۶
عنوان فارسی
چکیده فارسی مقاله
کلیدواژههای فارسی مقاله
عنوان انگلیسی
Characterization of Fresh and Regenerated Industrial Hydrocracking Catalysts; Study Causes of Deactivation
چکیده انگلیسی مقاله
In this investigation
, fresh and regenerated Ni-W-Alumina-Zeolite industrial hydrocracking catalysts are characterized via several analyzing methods, including XRF, XRD, BET adsorption, FT-IR, FESEM-EDS, and TGA-DTA to understand the phenomena affecting trend towards their deactivation. The XRD patterns represented the presence of main phases of Al
2
O
3
/Y-zeolite as support and NiWO
4
/WO
3
as active compounds. For the catalysts subjected to a three-year reactor operation/regeneration cycle, the XRF analysis revealed elemental enhancement of Fe, Na, V, Pb, Sb, and S, mostly from an outsourced environment. The BET and BJH analyses represented cylindrical shape mesoporosity for the samples, while the total pore-specific surface area and volume were reduced from 287.73 m
2
/g and 0.46 cm
3
/g to 160.84 m
2
/g and 0.40 cm
3
/g for fresh and regenerated samples, respectively. The latter results indicated possibly filling the pores with impurities and/or sintering of pores.
By
considering FESEM images, the smooth surface of the fresh sample and indented/corroded characteristics of the regenerated one were seen. The variety of analyses portrayed the increasing trend of the poisoning factors and the structural malfunction of the catalysts towards irreversible deactivation.
کلیدواژههای انگلیسی مقاله
Ni-W catalyst,Deactivation,Poisoning,Sintering
نویسندگان مقاله
Salman Hajian Ghayemi |
Chemical Engineering Department, Faculty of Engineering, University of Sistan and Baluchestan, PO Box 98164-161 Zahedan, I.R. IRAN
Abdolreza Samimi |
Chemical Engineering Department, Faculty of Engineering, University of Sistan and Baluchestan, PO Box 98164-161 Zahedan, I.R. IRAN
Masoud Nematollahi |
Process Engineer and Project Supervisor, Reserch and Development Department, Abadan Oil Refining Company, PO Box 6316953111 Abadan, I.R. IRAN
نشانی اینترنتی
https://ijcce.ac.ir/article_241298_864bd6e27e9c12f55006e9e02ce9af1c.pdf
فایل مقاله
فایلی برای مقاله ذخیره نشده است
کد مقاله (doi)
زبان مقاله منتشر شده
en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده
برگشت به:
صفحه اول پایگاه
|
نسخه مرتبط
|
نشریه مرتبط
|
فهرست نشریات