Effect of reduction and reaction temperature on activities of mesoporous alumina supported nickel catalysts and coke formation in dry reforming of methane

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ARBAĞ H., YAŞYERLİ S., YAŞYERLİ N., Dogu G., DOĞU T.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.33, sa.1, ss.63-73, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 33 Sayı: 1
  • Basım Tarihi: 2018
  • Doi Numarası: 10.17341/gazimmfd.406780
  • Dergi Adı: JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.63-73
  • Anahtar Kelimeler: Dry reforming of methane, mesoporous alumina, reduction temperature, reaction temperature, nickel, ALKALINE-EARTH PROMOTERS, NI CATALYSTS, SYNTHESIS GAS, MINIMIZATION, PERFORMANCE, SILICATE, ZEOLITE, SURFACE, BIOGAS, CO2
  • Gazi Üniversitesi Adresli: Evet

Özet

In this study effect of one of preparation steps, reduction temperature, and reaction temperature on activity of catalyst and coke formation were investigated. Mesoporous alumina materials were prepared by following a sol-gel method. The catalysts with different nickel amount (16 wt% and 8 wt%) were synthesized via one-pot and impregnation methods and reduced at different reduction temperatures (550 degrees C and 750 degrees C). Dry reforming of methane reaction was performed at 600 degrees C and 750 degrees C in a packed bed reactor system. It was observed that increase in the reduction temperature led nickel in the structure of the catalyst to form metallic Ni and increased the crystal size of Ni through sintering and changed the fractional methane conversion and selectivity of hydrogen. At high reaction temperature occurrence of reverse water gas shift and coke formation reactions as side reactions of dry reforming of methane could be reduced.