One Question per Day: Methanol Technology Exchange Edition 20180518
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Learn from the advanced practices of the *Brothers section; there are prizes for correct answers – any answer earns a reward, allowing us to grow and mature through these Q&A sessions. Short answer true/false question: What are the ash fusion temperature and the viscosity-temperature properties of ash? 1. Ash fusion temperature: It is the temperature at which coal ash softens and melts. 2. Viscosity-temperature properties: These refer to the fluidity of coal ash in its liquid state when it melts at different temperatures, and are generally expressed as ash viscosity. These two parameters determine the gasification operating temperature.
1. Ash fusion temperature: It is the temperature at which coal ash softens and melts. 2. Viscosity-temperature properties: These refer to the fluidity of coal ash in its liquid state when it melts at different temperatures, and are generally expressed as ash viscosity. These two parameters determine the gasification operating temperature.
Ash fusion point and viscosity-temperature properties are important indicators for gasification. The ash fusion point is the temperature at which coal ash melts; it generally involves several temperature stages such as softening, melting, and flowing. What we are usually concerned about is the temperature at which melting occurs. The lower the ash fusion point, the better it is for Texaco gasification. However, there are cases where certain types of coal have a low ash fusion point, but their ash does not exhibit good flow properties at that temperature, making them unsuitable for gasification. This is where the concept of viscosity-temperature characteristics comes into play – in other words, not only should the ash fusion point of the coal be low, but its viscosity at that temperature should also be low so that it can flow easily. Only such coal is suitable for Texaco gasification.
What are the ash fusion temperature and the viscosity-temperature properties of ash? 1. Ash fusion temperature: It is the temperature at which coal ash softens and melts. 2. Viscosity-temperature properties: These refer to the fluidity of coal ash in its liquid state when it melts at different temperatures, and are generally expressed as ash viscosity. These two parameters determine the gasification operating temperature. Correct