How did these data on coal-to-natural gas come out?
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I don't know how the following data is calculated? Please feel free to enlighten me, experts! 1. The total energy conversion rate of coal to natural gas is 60-65% ； It is about 70% higher than power generation, 25% higher than methanol production, and 30-60% higher than synthetic oil. (How about fertilizer production? ) 2. The CO conversion rate of coal-to-natural gas is close to 100%, the hydrogen conversion rate is 99%, the CO2 conversion rate is 98%, the selectivity is close to 100%, the waste heat utilization rate is 95-98%, and the wastewater does not contain harmful substances. (I don’t know what these conversion rates are, but for example, a 4 billion coal-to-natural gas plant will continuously emit 730,000 m³ of low-temperature methanol-washed exhaust gas (containing CO2, about 80%) every hour. ； The flue gas of the boiler is 2.95 million m³/h. After a year, tens of billions of cubic meters will be the same.) 3. We all know that in the fertilizer project, CO2 is sent to urea as raw material gas, and the carbon utilization rate should be very high. After natural gas is burned, the CO2 that cannot be digested is discharged into the atmosphere as waste gas! Adding part of the fuel gas consumption, I wonder if the profit is calculated in this way?
I’m really not sure about this. Maybe it’s based on converting the input and output materials into energy. The emissions are normal. After all, coal is still used for combustion. No matter what the final product is, the energy of coal is converted into other chemical products.
This is the laboratory data obtained by experts in the coal chemical industry. Specific industrialization or pilot-scale data will be lower than this.
Nothing compared to chemical fertilizers. Fertilizers are not energy sources.
These may be small test or pilot test data, and the actual data of the actual device will be lower than this. Calculated based on material balance and energy balance
Coal to natural gas? Are you talking about gas? Gas intensity, gasification efficiency, etc. can all be calculated. The initial calculation is based on the elemental analysis and industrial analysis of coal. Later, some of the calculations are based on empirical formulas and empirical coefficients.
What are the natural gas standards for coal-to-natural gas?
This is all made up! Coal-to-natural gas consumes a lot of energy, but the energy utilization is not that high! Because I am doing related calculations in this area recently! The above only represents my personal opinion!
It was calculated, right? The cold gas efficiency of Texaco and Schell furnaces is about 80%. Multiplied by the energy efficiency of conversion and methanation, it is roughly the number of LZ.
This post was last edited by huchsh on 2010-6-12 14:09. Can the original poster give the source? This data is indeed difficult to withstand scrutiny. To synthesize natural gas from coal, it must undergo a methanation reaction, and the raw materials for methanation must be obtained from the gasification reaction or other associated reactions. But CO2 must be released. Therefore, it is difficult to explain anything by just looking at this data. Only by combining it with specific processes can we make a specific explanation.
The total energy conversion rate is the percentage of the converted combustion value relative to the combustion value of raw coal. The conversion rate of CO is the percentage of CO converted to CH4, the conversion rate of H is the percentage of the incoming water vapor converted to CH4, and the waste heat utilization rate is the value converted to boiler steam. This is just my simple analysis. I hope you can correct me.