Carbon Dioxide → Carbon Dioxide

Synthesis gas having an inlet composition of 66.6% H2, 33.3% CO and 0.1% CO2 was fed to a 300 stainless steel autoclave charged with 3 gms. copper-chromite (containing 31.1% copper and 29% chromium), 0.8 gm. potassium hydroxide and 150 cc. methanol, reduced in situ using a stream of pure H2 flowing at 25 cc/min. for 16 hours at 170° C. Both catalysts were added separately in the powder form. The reactor was pressurized to 910 psig. and the temperature was adjusted to 150° C. Synthesis gas at a flow rate of 105 cc/min. (measured under standard conditions) was made to react under isothermal conditions. After an initial transient period, the process reached a steady state with respect to the amount of synthesis gas converted. A methanol production rate based on H2 consumption of 17.83 gmoles/h/kg catalyst was obtained with 61% synthesis gas conversion and 95% selectivity towards methanol. An exit gas composition of 64% H2, 34% CO, 0.8% CO2, 0.7% methanol, 0.4% methyl formate, 0.2% H2O and 0.07% dimethyl ether was obtained. A liquid composition of 95.6% methanol, 4% methyl formate, 0.3% water and traces of dimethyl ether and dissolved gases was obtained.

1. customSynthesis gas
2. additioncharged with 3 gms
3. customfor 16 hours
4. customat 170° C
5. additionBoth catalysts were added separately in the powder form
6. customwas adjusted to 150° C
7. customSynthesis gas at a flow rate of 105 cc/min. (measured under standard conditions)
8. customto react under isothermal conditions
9. customto the amount of synthesis gas
10. customA methanol production rate based on H2 consumption of 17.83 gmoles/h/kg catalyst
11. customwas obtained with 61% synthesis gas conversion and 95% selectivity towards methanol

ORD record

ord-7f2548883a904e84a7955a70cf947576

Source dataset

uspto-grants-1993_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05221652