Catalytic Supercritical Water Gasification of 2-Propanol: The Effect of Fe-Cr Catalyst on Gasification and Hydrogen Yields


Kıpçak E. , Akgün M.

ACADEMIC JOURNAL OF SCIENCE, cilt.3, ss.417-426, 2014 (Diğer Kurumların Hakemli Dergileri)

  • Cilt numarası: 3
  • Basım Tarihi: 2014
  • Dergi Adı: ACADEMIC JOURNAL OF SCIENCE
  • Sayfa Sayısı: ss.417-426

Özet

The development of alternative and efficient ways for hydrogen production, which is expected 

to  be  the  primary  energy  source  in  the  future,  is  currently  the  focus  of  many  scientific 

investigations.  Aiming  to  contribute  to  this  vital  area  of  research,  this  study  presents  our 

findings regarding  the supercritical water gasification of 2-propanol with Fe-Cr catalyst. The 

experiments were conducted at five reaction temperatures (400, 450, 500, 550 and 600􀁱C) and 

for  five  reaction  times  (10, 15, 20, 25 and 30  s), under a constant pressure of 25 MPa. The 

effects  of  process  parameters  on  the  gasification  and  hydrogen  yields,  along  with  gaseous 

product composition were investigated. The gaseous product was seen to be mainly comprised 

of hydrogen, methane, ethane, propane and propylene in terms of flammable components. The 

experiments  showed  that  reaction  temperature  affected  gaseous  component  production 

significantly;  and  that  high  temperatures  favored  the  gasification  yield. At  600􀁱C  and  for  a 

reaction time of 30 s, for each L of 2-propanol solution feedstock, a gaseous product of 14.7 L 

evolved.  At  these  circumstances,  the  gaseous  product  contained  10.4%  hydrogen,  41.4% 

methane,  9.0%  ethane,  3.6%  propane,  1.1%  propylene  and  36.3%  carbon  dioxide.  On  the 

contrary,  low  temperatures  and  reaction  times  were  found  to  favor  hydrogen  production. 

During the experiment performed at 400􀁱C and 10 s, the gaseous product was seen to involve 

70.7% hydrogen.