Abstract
Preparation of iron molybdenum oxide promoted chromium oxide (Cr 2 O 3 /Fe 2 (MoO 4 ) 3 ) has been done. The sample is synthesized by precipitation method. The performance of the catalyst is evaluated by the catalytic oxidation of methanol to formaldehyde. For comparison, in this experiment also use Fe 2 (MoO 4 ) 3 without promoter and Fe 2 (MoO 4 ) 3 commercial. The samples are characterized by xray diffractometer (XRD) to determine its composition. XRD results indicate that the catalyst component comprised of Fe 2 (MoO 4 ) 3 , Fe 2 O 3 , and MoO 3 . The reaction is conducted in a tubular reactor with fixed-bed catalyst, operating at temperatures of 250, 300, 350 °C, and atmospheric pressure. The products are analyzed by Shimadzu gas chromatography using a porapak-Q column. The highest yield of formaldehyde of each catalyst, i.e: Fe 2 (MoO 4 ) 3 , Cr 2 O 3 /Fe 2 (MoO 4 ) 3 of 83%, 86% at temperatures of 300 °C and Fe 2 (MoO 4 ) 3 commercial reach 96% at a temperature of 350 o C, respectively. The addition of Cr 2 O 3 as a promoter shows increased the activity of iron molybdenum oxide catalysts.
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