[Methanol Technical Version] Process Questions, July 23
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To increase the popularity of this section, special daily quizzes on equipment, processes, and safety are held, with the motto: \"Knowledge is gained through accumulation.\" I hope everyone will participate actively; by learning and making progress, they can also earn wealth. What are the methanol synthesis reactions? Participation: Reply reward of 1-3 wealth points ； Correct answer: Reward of 5-10 wealth points ； Note: Questions for the same day are valid only on that day; this post is valid for 24 hours.
(1) Main reactions: CO + 2H2 = CH3OH + Q; CO2 + 3H2 = CH3OH + H2O + Q. (2) Side reactions: 2CO + 4H2 = CH3OCH3 + H2O + Q; CO + 3H2 = CH4 + H2O + Q; 4CO + 8H2 = C4H9OH + 3H2O + Q; CO2 + H2 = CO + H2O – Q; nCO + 2nH2 = (CH2)n + nH2O + Q
CO + 2H2 == CH3OH CO2 + 3H2 == CH3OH + H2O 3CH4 + CO2 + 2H2O == 4CH3OH
CO+2H2==CH3OH CO2+3H2==CH3OH+H2O
1) Main reactions: CO + 2H2 = CH3OH + Q; CO2 + 3H2 = CH3OH + H2O + Q. (2) Side reactions: 2CO + 4H2 = CH3OCH3 + H2O + Q; CO + 3H2 = CH4 + H2O + Q; 4CO + 8H2 = C4H9OH + 3H2O + Q; CO2 + H2 = CO + H2O – Q; nCO + 2nH2 = (CH2)n + nH2O + Q
2H₂ + CO → CH₃OH. Methanol synthesis can use solids such as coal and coke, liquids such as crude oil, heavy oil, and light oil, or gases such as natural gas and other flammable gases as raw materials. Through gas generation, purification (desulfurization), and shift reactions to remove carbon dioxide, a suitable syngas (composed of carbon monoxide and hydrogen) is prepared. Different process conditions are selected in the presence of various catalysts. Methanol yield (by high-pressure, low-pressure, and medium-pressure methods), or methanol produced in conjunction with ammonia synthesis (co-production method). The synthesized crude methanol is subjected to pre-distillation to remove dimethyl ether, followed by distillation to yield pure methanol. The high-pressure method was the first approach to achieve industrial synthesis developed by BASF; however, due to its high energy consumption, complex processing requirements, stringent material specifications, and numerous by-products in the product, it will be replaced in the future by ICI’s low-pressure and medium-pressure methods as well as Lurgi’s low-pressure and medium-pressure methods
(1) Main reactions: CO + 2H2 = CH3OH + Q; CO2 + 3H2 = CH3OH + H2O + Q. (2) Side reactions: 2CO + 4H2 = CH3OCH3 + H2O + Q; CO + 3H2 = CH4 + H2O + Q; 4CO + 8H2 = C4H9OH + 3H2O + Q; CO2 + H2 = CO + H2O – Q; nCO + 2nH2 = (CH2)n + nH2O + Q
(1) Main reactions: CO + 2H2 = CH3OH + Q; CO2 + 3H2 = CH3OH + H2O + Q. (2) Side reactions: 2CO + 4H2 = CH3OCH3 + H2O + Q; CO + 3H2 = CH4 + H2O + Q; 4CO + 8H2 = C4H9OH + 3H2O + Q; CO2 + H2 = CO + H2O – Q; nCO + 2nH2 = (CH2)n + nH2O + Q
1) Main reactions: CO + 2H2 = CH3OH + Q; CO2 + 3H2 = CH3OH + H2O + Q. (2) Side reactions: 2CO + 4H2 = CH3OCH3 + H2O + Q; CO + 3H2 = CH4 + H2O + Q; 4CO + 8H2 = C4H9OH + 3H2O + Q; CO2 + H2 = CO + H2O – Q; nCO + 2nH2 = (CH2)n + nH2O + Q
1. The main chemical reaction is CO + H2 → CH3OH(g). In the presence of carbon dioxide, methane is formed through the following reactions: CO2 + H2 → CO + H2O(g); CO + H2 → CH3OH(g). The overall reaction for these two steps is: CO2 + 3H2 → CH3OH + H2O.
2. Typical side reactions include: 2CO + 4H2 → CH3OCH3 + H2O; CO + 3H2 → CH4 + H2O; 4CO + 8H2 → C4H9OH + 3H2O
2. Typical side reactions include: 2CO + 4H2 → CH3OCH3 + H2O; CO + 3H2 → CH4 + H2O; 4CO + 8H2 → C4H9OH + 3H2O
The main reactions are: CO + 2H2 → CH3OH + 102.5 kJ/mol; CO2 + 3H2 → CH3OH + H2O + 59.6 kJ/mol. The side reactions are: 2CO + 4H2 → CH3OCH3 + H2O + 200.2 kJ/mol; CO + 3H2 → CH4 + H2O + 115.6 kJ/mol; 4CO + 8H2 → C4H9OH + 3H2O + 49.62 kJ/mol; CO2 + H2 → CO + H2O – 42.9 kJ/mol; nCO + 2nH2 → (CH2)n + nH2O + Q