How much coal is needed to produce one ton of methanol?

In our country, coal with a calorific value of 7,000 kcal (29,306 kJ) per kilogram is defined as standard coal, also known as reference coal. Heat of combustion of methanol: 726.55 kJ/mol (equivalent to 22.7 MJ/kg). Therefore, one ton of methanol is equivalent to 22.7/29.306 = 0.77 tons of standard coal; when converted to ordinary coal, this amount is roughly between 1.2 and 1.5 tons. Standard coal is defined as follows: There are many types of energy sources, each with a different heat content. To facilitate comparison and overall analysis, China defines standard coal as coal with a heat content of 7,000 kcal (29,306 kJ) per kilogram. Additionally, our country often converts various forms of energy into tons of standard coal for representation; for example, the energy in 1 ton of straw is equivalent to 0.5 tons of standard coal, while the energy in 1 cubic meter of biogas is equivalent to 0.7 kilograms of standard coal. 　　Standard coal, also known as coal equivalent, has a unified calorific value standard. Our country specifies that the calorific value of each kilogram of standard coal is 7,000 kcal. Energy of different varieties and contents is converted into standard coal with a calorific value of 7,000 kcal per kilogram, based on their respective calorific values. 　　The coefficient for converting energy to standard coal = actual calorific value of a certain type of energy (kcal/kg) / 7000 (kcal/kg). Before converting various types of energy into standard coal, it is first necessary to determine their actual average calorific values, and only then can they be converted into standard coal. The average calorific value, also known as the average heat release, refers to the weighted average of the measured heat release values of different types or varieties of energy sources. The calculation formula is as follows: Average calorific value (kcal/kg) = Total energy amount (tons) / …… Reference coefficients for converting various types of energy into standard coal: Energy type, Average lower heating value, Coefficient for conversion to standard coal. Raw coal: 20,934 kJ/kg; 0.7143 kg of standard coal per kg. Cleaned coal: 26,377 kJ/kg; 0.9000 kg of standard coal per kg. Other types of cleaned coal: 8,374 kJ/kg; 0.2850 kg of standard coal per kg. Coke: 28,470 kJ/kg; 0.9714 kg of standard coal per kg. Crude oil: 41,868 kJ/kg; 1.4286 kg of standard coal per kg. Fuel oil: 41,868 kJ/kg; 1.4286 kg of standard coal per kg. Gasoline: 43,124 kJ/kg; 1.4714 kg of standard coal per kg. Kerosene: 43,124 kJ/kg; 1.4714 kg of standard coal per kg. Diesel: 42,705 kJ/kg; 1.4571 kg of standard coal per kg. Liquefied petroleum gas: 47,472 kJ/kg; 1.7143 kg of standard coal per kg. Plant dry gas: 46,055 kJ/kg; 1.5714 kg of standard coal per kg. Natural gas: 35,588 kJ/m³; 12.143 tons per 10,000 m³. Coke oven gas: 16,746 kJ/m³; 5.714–6.143 tons per 10,000 m³. Other types of gas: 3.5701 tons per 10,000 m³. Heat: 0.03412 tons per million kJ. Electricity: 1.229 tons per 10,000 kWh. 1. For heat, the calculation method involves determining the enthalpy per kilogram from the temperature and pressure of the steam and hot water at the boiler outlet using a hysteresis diagram, subtracting the enthalpy of the feedwater (or return water), and then multiplying by the actual amount of steam or hot water produced by the boiler (as indicated by the flow meter). If some enterprises do not have flow meters for steam or hot water, nor heat and entropy charts, the following methods can be used for estimation: (1) The amount of water lost due to fouling in the boiler during the reporting period can be used as an estimate of the output of steam or hot water. 　　(2) When hot water is supplied in a closed-loop system, the heat content per kilogram is calculated at 20 kcal; when it is supplied in an open-loop system, it is calculated at 70 kcal (both values are based on an outlet temperature of 90°C and a return water temperature of 20°C). 　　(3) For saturated steam, the heat energy is 620 kilocalories at a pressure of 1–2.5 kilograms per square centimeter and a temperature of over 127°C; it is 630 kilocalories at a pressure of 3–7 kilograms per square centimeter and a temperature of 135°C–165°C. At a pressure of 8 kilograms per square centimeter and a temperature of over 170°C, 640 kilocalories are calculated per kilogram of steam. 　　(4) Superheated steam, with a pressure of 150 kilograms per square centimeter; the heat content per kilogram is 650 kcal for temperatures below 200°C, 680 kcal for temperatures between 220°C and 260°C, 700 kcal for temperatures between 280°C and 320°C, and also 700 kcal for temperatures between 350°C and 500°C. Convert to joules at 4.1868 joules. 　　2. Conversion between the thermal unit “kilocalorie” and the standard coal unit “ton”. In the energy conversion factors, the units for “steam” and “hot water” are kilocalories; however, in the “Basic Information Table” (under energy consumption), the unit for “steam” is steam tons, while for other energy consumptions (converted to standard coal), the unit for “hot water” is tons. Therefore, further conversion is necessary to meet the requirements of the “Basic Information Table”. The conversion is based on the standard rate of 7,000 kilocalories per ton, which equates to 1 kilogram of standard coal.

3. Calorific value of electricity. There are generally two methods for calculating it: one is based on the theoretical calorific value, and the other is based on the coal consumption required for power generation. Each method has its own uses. The theoretical calorific value is calculated based on the thermal work equivalent of 1 kilowatt-hour, which is 860 calories, or 0.1229 kilograms of standard coal. Calculated based on the coal consumption in thermal power generation, this figure varies from year to year. For ease of comparison, **the Statistics Bureau’s standard of 0.404 kilograms of standard coal per kilowatt-hour is used as the coefficient for converting electricity into standard coal going forward.

It takes about 2.5 tons of coal to produce one ton of methanol

I’m not sure if you’ve conducted any market research, but the methanol industry is currently in a loss-making phase. Methanol is a by-product of our company’s operations, and we are forced to produce it; therefore, we try to minimize its production volume. Our costs are relatively low compared to those of other companies in this industry, but still, we incur losses on our methanol products, as the price at which we sell them is lower than the cost of producing them.

It depends on the type of coal you use; different coal qualities require different amounts of coal for methanol production, and it also relates to the gasification method.

Methanol is produced by the Texaco gasification method, with approximately 1.5 tons of coal required per ton of methanol.

I’m not very familiar with methanol produced from coal, but in Saudi Arabia, methane is produced from natural gas, and 795–815 cubic meters of natural gas are required to produce one ton of methanol.

Coal consumption varies depending on the process, load, and type of coal used. Generally, 1.5 tons of raw coal and around 1 ton of fuel coal are consumed

Our company’s methanol production cost is 2100 Kg of standard coal per ton of coal used. The price of methanol is rising steadily now, and we have already started producing it. This post was last edited by LZ Gas Station on 2009-4-9 21:39.]

What gasification technology do you use? We plan to adopt the Lurgi gasification technology, with a coal consumption of over 2.2.

Adding a post: What was said above makes sense. The current price of methanol is probably around 1900, though there are differences depending on the region. In general, it’s a loss-making situation. However, **it seems there is a policy offering a subsidy of 300 yuan per ton produced, to boost economic development. To be honest, the methanol industry now has too many players and not enough resources

Approximately 1.5 tons of anthracite coal are needed to produce one ton of methanol. It’s hard to say anything about the other calorific values.

Producing one ton of methanol requires 2,100 Nm3 of syngas; one ton of coal requires 3,000 Nm3 of gas. With an effective gas yield of 70%, one ton of coal can be used to produce one ton of methanol