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In a typical synthesis 1,0 g of catalyst is
placed inside of an ¡®¡®U¡¯¡¯-shaped quartz and
heated up to 750 8C in nitrogen atmosphere,
then the ethylene at 300 cm3
/min is diluted
in nitrogen at 100 cm3
/min and flowed
through the tube for 30 minutes. After, the
furnace is cooled down to room tempera?ture the product is removed. When iron is
deposed on mesoporous silica, a previous
reduction of the catalyst is carried out with
50 cm3
/min of H2 in 150 cm3/min N2 for
15 minutes.

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