Methanol synthesis and production test questions, how many can you answer correctly? !
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The synthesis reaction formula is. Characteristics of reaction: . The synthesis catalyst reduction equation is: . This reaction is reaction 1. Factors affecting the synthesis reaction. 2. Airspeed: . In methanol synthesis, the appropriate space velocity should be maintained at. When the amount of synthesis gas is 250,000, the space velocity of the synthesis reaction is. 3. The optimal hydrogen-to-carbon ratio in fresh gas is, in actual production, it is approximately. The optimal hydrogen-to-carbon ratio of syngas is, in actual production, it is approximately. 4. There are inert gases in the material components. It is better to keep the inert gas content in the gas not exceeding. 5. The synthesis tower is a reactor, with a tube side of 0.0 and a shell side of 0.00. The reaction heat of synthesis is taken away by the reactor. As the activity of the catalyst decreases, the hot spots in the synthesis reaction gradually increase. 6. When using startup steam to heat up the synthesis tower, it should be prevented. The main phenomenon is that at this time, on-site personnel should. This post was last edited by Zhenyouci on 2009-4-15 17:18 ]
Is this simple? This is our basic knowledge.
You should master this by yourself, thank you for sharing
Personal opinion. Please correct me if I am inappropriate.: The synthesis reaction formula is (strongly exothermic, volume-shrinking gas-solid phase catalysis) reaction, and the characteristics of the reaction are:: (It is multi-directional and the reaction mainly occurs on the inner surface of the catalyst). The synthesis catalyst reduction equation is: (CuO+H2——Cu+H2O, CuO+CO——Cu+CO2). 1. Factors affecting synthesis reactions: (Reaction temperature, pressure, gas composition, space velocity). 2. Airspeed: (The amount of gas passing through the catalyst per unit volume per unit time). In methanol synthesis, the appropriate space velocity should be maintained at (10000-30000h-1). When the amount of synthesis gas is 250,000, the space velocity of the synthesis reaction is (8000~10000h-1). 3. The optimal hydrogen-to-carbon ratio in fresh gas is: ((H2-CO2)/(CO+CO2)=2.05), in actual production it is about: (Between 2.05～2.15). The optimal hydrogen-to-carbon ratio of syngas is ((H2-CO2)/(CO+CO2)=5.5), which is about (5~6) in actual production. 4. The inert gases in the material components include (CH4, N2, Ar). It is better to keep the inert gas content in the gas not exceeding (20%). 5. The synthesis tower is a (tube and shell) reactor, the tube side is (catalyst), and the shell side is (desalted water). The reaction heat of synthesis is taken away by (by-product medium-pressure steam between the tube and shell). As the activity of the synthesis reaction decreases, the hot spot gradually (moves down). 6. When using startup steam to heat up the synthesis tower, (liquid hammer) should be prevented. The main phenomenon is (adding steam too fast, causing the tubes in the synthesis tower to vibrate). At this time, on-site personnel should (turn off the steam valve in time and slowly heat up).
The synthesis reaction formula is (main reaction: CO+2H2=CH3OH+102.5kJ/mol). Characteristics of reaction: (Exothermic, reversible, accompanied by side reactions) The reduction equation of the synthetic catalyst is: (CuO=h2=Cu+H2O) This reaction is (exothermic) Reaction 1. Factors affecting the synthesis reaction a Operating pressure ； bTemperature ； cComposition of raw gas ； 2. Airspeed: In methanol synthesis, the appropriate space velocity should be maintained at 10,000---30,000 per hour. When the amount of synthesis gas is 250,000, the space velocity of the synthesis reaction is. 3. The optimal hydrogen-to-carbon ratio in fresh gas is (2.05---2.15), which is approximately (larger than the previous value) in actual production. The optimal hydrogen-to-carbon ratio of syngas is (2.05---2.15), which is about (4--5) in actual production. 4. Inert gases in the material components include (nitrogen, methane, argon, etc.), and the content of inert gases in the gas should be kept not to exceed (25%). 5. The synthesis tower is a (tube and shell type) reactor. The tube side is (catalyst, reaction gas), and the shell side is (boiling water). The reaction heat of synthesis is taken away by (boiling water in the steam drum). As the activity of the synthesis reaction decreases, the hot spot gradually (moves down). 6. When using start-up steam to heat up the synthesis tower, you should prevent the occurrence of (temperature flying). The main phenomenon is (the temperature of the synthesis tower rises sharply). At this time, on-site personnel should (reduce the amount of hydrogen added or turn off the start-up injector)