Methanol Purification Version – One Question per Day 20200820
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What are the reasons for an increase in the inlet pressure of the synthesis tower? When synthesizing methanol, regardless of the production process used, there is a equilibrium point for the reaction pressure. Under normal operating conditions, this pressure equilibrium remains stable; however, an increase in pressure can be attributed to the following reasons: (1) A decrease in reaction temperature, which leads to a deterioration of the synthesis reaction, or even its failure. And fresh gas is continuously supplied, causing the system pressure to rise, even to excessive levels. (2) An increase in the methane content in the recycle gas affects the methanol synthesis reaction, and it is also a cause of the rise in inlet pressure. (3) The cooling effect is poor when the syngas passes through the circulating water cooler, preventing the generated methanol from being separated. (4) Increasing the fresh gas flow rate without notifying the synthesis unit in a timely manner. (5) Catalyst activity declines, and the conversion rate is low.
1) An imbalance in the hydrogen-to-carbon ratio can be corrected by adjusting the amount of hydrogen added, so as to keep the ratio within the normal range. 2) An increase in the content of inert gases such as CH4 and N2 in the recycle gas leads to a decrease in the partial pressures of CO, CO2, and H2, thereby affecting the synthesis reaction. 3) As the catalyst reaction temperature drops, the synthesis reaction deteriorates. 4) The increase in the outlet pressure of the recycle gas compressor leads to a high inlet pressure in the synthesis tower. 5) The cooling and separation of crude methanol in the syngas are inadequate. 6) High pressure in the gasification system can also cause high pressure at the inlet of the synthesis tower
(1) As the reaction temperature drops, the synthesis reaction deteriorates, or even worsens. And fresh gas is continuously supplied, causing the system pressure to rise, even to excessive levels. (2) An increase in the methane content in the recycle gas affects the methanol synthesis reaction, and it is also a cause of the rise in inlet pressure. (3) The cooling effect is poor when the syngas passes through the circulating water cooler, preventing the generated methanol from being separated. (4) Increasing the fresh gas flow rate without notifying the synthesis unit in a timely manner. (5) Catalyst activity declines, and the conversion rate is not high.
1) An imbalance in the hydrogen-to-carbon ratio can be corrected by adjusting the amount of hydrogen added, so as to keep the ratio within the normal range. 2) An increase in the content of inert gases such as CH4 and N2 in the recycle gas leads to a decrease in the partial pressures of CO, CO2, and H2, thereby affecting the synthesis reaction. 3) As the catalyst reaction temperature drops, the synthesis reaction deteriorates. 4) The increase in the outlet pressure of the recycle gas compressor leads to a high inlet pressure in the synthesis tower. 5) The cooling and separation of crude methanol in the syngas are inadequate. 6) High pressure in the gasification system can also cause high pressure at the inlet of the synthesis tower
1) An imbalance in the hydrogen-to-carbon ratio can be corrected by adjusting the amount of hydrogen added, so as to keep the ratio within the normal range. 2) An increase in the content of inert gases such as CH4 and N2 in the recycle gas leads to a decrease in the partial pressures of CO, CO2, and H2, thereby affecting the synthesis reaction. 3) Decline in catalyst activity. 4) An increase in the outlet pressure of the recycle gas compressor leads to a high inlet pressure in the synthesis tower. 5) The cooling and separation efficiency of crude methanol in syngas is poor. 6) High pressure in the gasification system can also cause high pressure at the inlet of the synthesis tower.
1) An imbalance in the hydrogen-to-carbon ratio can be corrected by adjusting the amount of hydrogen added, so as to keep the ratio within the normal range. 2) An increase in the content of inert gases such as CH4 and N2 in the recycle gas leads to a decrease in the partial pressures of CO, CO2, and H2, thereby affecting the synthesis reaction. 3) As the catalyst reaction temperature drops, the synthesis reaction deteriorates. 4) The increase in the outlet pressure of the recycle gas compressor leads to a high inlet pressure in the synthesis tower. 5) The cooling and separation of crude methanol in the syngas are inadequate. 6) High pressure in the gasification system can also cause high pressure at the inlet of the synthesis tower
1) An imbalance in the hydrogen-to-carbon ratio can be corrected by adjusting the amount of hydrogen added, so as to keep the ratio within the normal range. 2) An increase in the content of inert gases such as CH4 and N2 in the recycle gas leads to a decrease in the partial pressures of CO, CO2, and H2, thereby affecting the synthesis reaction. 3) Decline in catalyst activity. 4) An increase in the outlet pressure of the recycle gas compressor leads to a high inlet pressure in the synthesis tower. 5) The cooling and separation efficiency of crude methanol in syngas is poor. 6) High pressure in the gasification system can also cause high pressure at the inlet of the synthesis tower.
1) An imbalance in the hydrogen-to-carbon ratio can be corrected by adjusting the amount of hydrogen added, so as to keep the ratio within the normal range. 2) An increase in the content of inert gases such as CH4 and N2 in the recycle gas leads to a decrease in the partial pressures of CO, CO2, and H2, thereby affecting the synthesis reaction. 3) As the catalyst reaction temperature drops, the synthesis reaction deteriorates. 4) The increase in the outlet pressure of the recycle gas compressor leads to a high inlet pressure in the synthesis tower. 5) The cooling and separation of crude methanol in the syngas are inadequate. 6) High pressure in the gasification system can also cause high pressure at the inlet of the synthesis tower
1) An imbalance in the hydrogen-to-carbon ratio can be corrected by adjusting the amount of hydrogen added, so as to keep the ratio within the normal range. 2) An increase in the content of inert gases such as CH4 and N2 in the recycle gas leads to a decrease in the partial pressures of CO, CO2, and H2, thereby affecting the synthesis reaction. 3) As the catalyst reaction temperature drops, the synthesis reaction deteriorates. 4) The increase in the outlet pressure of the recycle gas compressor leads to a high inlet pressure in the synthesis tower. 5) The cooling and separation of crude methanol in the syngas are inadequate. 6) High pressure in the gasification system can also cause high pressure at the inlet of the synthesis tower