Fan , Mun Sing
(2010)
Development Of Bimetallic Catalyst Ni-Co/MgO-ZrO2 For
Reforming Of Methane Using Carbon Dioxide.
Masters thesis, Universiti Sains Malaysia.
Abstract
Carbon dioxide reforming of methane (CDRM) is a potential method to
utilize the greenhouse gases (CO2 and CH4) to produce syngas as the feedstock for
the production of liquid fuel through Fischer-Tropsch process.
Nickel (6 wt% Ni), cobalt (6 wt% Co) and Ni-Co (3 wt% Ni and 3 wt% Co)
supported over mesoporous MgO-ZrO2 as catalysts were prepared using a surfactant
assisted-impregnation method. CDRM process using these catalysts were studied in a
quartz tube microreactor at 750 °C, 1 atm with gas hourly space velocity of 125,000
mL/g/h. Based on reactant’s conversion and syngas yield in the product stream,
bimetallic catalyst Ni-Co/MgO-ZrO2 (NCMZ) was a suitable catalyst for carbon
dioxide reforming. The bimetallic catalyst exhibited high and stable activity during
40 h reaction time with methane and carbon dioxide conversions of 80 % and 84 %,
respectively. The syngas ratio was close to unity, without significant deactivation as
compared to the respective monometallic catalysts. The bimetallic catalyst also
exhibited excellent regenerability by restoring its initial catalytic activity through 1 h
of regeneration treatment in air. The high performance of the catalyst was due to
better metal dispersion, small metal particle size and synergetic effect between Ni
and Co particles.
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