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[摘要]：A statistically designed set of experiments was run in a continuous downflow fixed-bed reactor to evaluate the intrinsic kinetics of the formation of methanol, higher alcohols, total hydrocarbon, and carbon dioxide from synthesis gas under a range of experimental conditions. To eliminate mass-transfer resistance, a multiwalled carbon nanotube (MWCNT)-supported K-promoted trimetallic sulfided Co-Rh-Mo catalyst was used in the particle size range of 147-210 mu m. To predict the reaction rate for higher alcohol synthesis, the power law model was used for the reaction between CO and H-2 on the catalyst surface. The operating conditions, such as reactor temperature (T), pressure (P), gas hourly space velocity (GHSV), and H-2/CO molar ratio, were varied in the ranges of 275-350 degrees C, 800-1400 psig (5.52-9.65 MPa), 2.4-4.2 m(3) standard temperature and pressure (STP) (kg of catalyst)(-1) h(-1), and 0.5-2.0, respectively. The data of this study are well-fitted by the power law model. The activation energies of ethanol and higher alcohols obtained over Co-Rh-Mo-K/MWCNT were low compared to those values reported in the literature. |
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