Biofuel production over fischer-tropsch synthesis: Effect of fe-co/meso-hzsm-5 catalyst weight on product composition and process conversion

Jimmy Jimmy*, Achmad Roesyadi, Suprapto Suprapto, Firman Kurniawansyah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Fischer-Tropsch Synthesis (FTS) using Fe-Co/meso-HZSM-5 catalyst has been investigated. The impregnated iron and cobalt on HZSM-5 could be used as bifunction catalyst which combined polimerizing synthesis gas and long hydrocarbon crack-ing for making biofuel (saturated C5 –C25 hydrocarbons as gasoline, kerosene and diesel oil). The study emphasized the effect of ca talyst weight on product composition and process conversion. The HZSM-5, had been converted from ammonium ZSM-5 through calcination, and then desilicated with NaOH solution. The Co(NO3)2 ⋅6H2 O and Fe(NO3)3 ⋅9H2 O were used as precursor for in cipient wetness impregnation (IWI) on amorphous meso-HZSM-5. The catalyst consisted of 10 % Fe and 90 % Co by weight, called 10Fe-90Co/meso-HZSM-5. All catalysts were reduced in situ in the continuous reactor with f lowing hydrogen at 25 mL/min, 1 bar, 400 °C for 10 hours. The catalyst performance was observed in the same continuous fixed bed reactor at 25 mL/min synthesis gas (30 % CO, 60 % H2, 10 % N2), 250 °C, 20 bar for 96 hours. Various catalyst weight (1, 1.2, 1.4, 1.6 gram) were applied in FTS. The desilicated HZSM-5 properties (BET analysis) were 6.1–29.9 nm mesoporous diameter, 0.3496 cc/g average meso-porous volume, 526.035 cc/g pore surface area, and the EDX analysis gave 22.1059 Si/Al ratio and 16.11 % loading (by weight) on meso-HZSM-5. The reduced catalyst showed the XRD spectra of Fe (66°), Fe-Co alloy (44.50°) and Co3 O4 (36.80°). The reaction using 1 gram of 10Fe-90Co/meso-HZSM-5 catalyst produced the largest composition and conversion. The 1 gram catalyst gave the largest normal selectivity of gasoline (19.15 %) and kerosene (55.18 %). While the largest normal diesel oil selectivity (24.17 %) was obtained from 1.4 gram of catalyst. The CO conversion per gram of catalyst showed similar value (CO conversion of 26–28 %) for all catalyst weight.

Original languageEnglish
Pages (from-to)19-27
Number of pages9
JournalEUREKA, Physics and Engineering
Issue number6
Publication statusPublished - 2021
Externally publishedYes


  • Biofuel
  • Catalyst
  • Cobalt
  • Conversion
  • Desilication
  • Fischer-Tropsch
  • HZSM-5
  • Iron
  • Mesopore
  • Weight


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