What are the typical gas composition characteristics of the gas output from Texaco’s gas generation process?

co:43% CO2:22% CH4:0.10% Ar:0.10 H2:33%

For a 40-kilogram Texaco furnace, the gas composition is as follows: CO: 44.59%, H2: 37.21%, CO2: 17.49%, CH4: 0.11%, N2: 0.35%, H2S: 0.12%. Does anyone among you know the composition of the syngas produced by an 80-kilogram Texaco furnace? Please let me know so that I can have complete information on Texaco furnaces.

This post was last edited by Comrade Li on 2009-8-12 at 10:05. Are these design data or data from actual operation? The CO2 level is slightly high, while the CH4 level is normal. If it’s data from actual operation, could the temperature be slightly high?

　The Texaco water-coal slurry pressurized gasification method is one of the advanced gasification technologies in the world today, and it belongs to the fluidized bed pressurized gasification category. Its features include a wide range of coal types that can be used in this process; it is possible to utilize pulverized coal, the production capacity of each gasification furnace is high, the gasification operates at high temperatures, liquid slag is produced, the carbon conversion rate is high, the quality of the gas produced is good, the methane content is low, and no pollutants such as tar, naphthalene, or phenols are generated. The discharged coarse ash can be used as raw material for cement and building materials. The treatment of waste water, waste gas, and solid waste is simple, making it easy to meet environmental protection requirements. It features a high level of production control, making process automation and computer control easy to achieve. 　　(1) Industrialization status Texcao Company began research on the gasification of coal and coke using oxygen as a gasifying agent in its laboratory in Montebello in 1957. In 1973, it installed a test facility with a coal feeding rate of 15 t/d to conduct experiments on pressurized water-coal slurry gasification. After 30 years of testing and industrialization, the Texaco water-coal slurry pressurized gasification process has evolved into an advanced, mature, and reliable coal gasification technology. 　 (2) Advantages of pressurized water-coal slurry gasification 　① Wide adaptability to different coal types. Young bituminous coal and pulverized coal can both be used as raw materials; the ash fusion point should not exceed 1350°C. The coal should have good grindability and slurry-forming properties, with the concentration of the resulting coal slurry being preferably above 60%. 　　②The vaporization pressure range is wide. Industrial plants are available for pressures ranging from 2.5 to 8.0 MPa, with 4.0 MPA being the most common. As plant sizes increase, 6.5 MPa is also becoming more widely used, as higher gasification pressures can save energy required for compressing syngas. 　　③The gasifier has a high heat utilization rate. Synthesis gas with a high steam content can be produced using a quenching process; such gas is used in the production of synthetic ammonia. No additional steam is required in the shift reaction step, and heat can be recovered through a waste heat recovery system to produce high-pressure steam. However, waste heat recovery equipment is relatively expensive, so its use should be considered carefully. 　　④There is no transmission mechanism in the gasifier, giving it a relatively simple structure. 　　⑤It produces a large amount of gas per unit volume. A gasifier with a diameter of 2800 mm and a pressure of 4.0 MPa can produce gas, enabling an annual output of 500 tons of ammonia (or methanol); in China, the largest diameter currently available is 3200 mm. 　　⑥The content of active gas components is high. CO + H2 ≥ 80%, slag discharge is pollution-free, and wastewater contains little cyanide, making it easy to treat. Due to high-temperature gasification, the gas contains very low levels of methane (CH4≤0.1%) and is free of tar. 　　⑦The carbon conversion rate is high, reaching over 98% at its maximum.

3# shanxg will let you know in a while – you’ll be able to get access soon!

I think this parameter is closely related to the quality of the coal; please let me know the origin of the coal. It would be great if you could provide a comparison table of design parameters and actual values. Please continue to post your comments!

The corresponding coal is very important; it would be best to have an elemental analysis, industrial analysis, and so on

This post was last edited by GSP on 2009-8-19 at 10:17. For these data, it is best to consider coal quality analysis and gasification parameters together; coal quality data is very important. The approximate values according to Texaco’s technology are as follows: CO: around 45%； H2: Around 35% ； CH4: around 0.1% ； CO2: around 18% ； Ar: around 0.1% ； H2S: Depends on the sulfur content in the coal; there is no fixed range ； N2: It depends on the nitrogen content in vitrein, and there is no fixed range.

Actual operating values: CO: 40–47%, H2: 33–40%, CH4: <0.1%, CO2: 17–25%, Ar+N2: <1.0%, H2S: O2: <0.2% (these values vary significantly depending on the conditions of the furnace). Coal source: Hegang or Shuangyashan. Pressure in the gasification furnace: 4.0 MPa.

Huating + Yima: CO: 43.4%, H2: 34.3%, CO2: 21.5%, CH4: 150–250 PPM, N2+AR: 0.4–0.75%. If the ash content and ash fusion point of the coal are high, the furnace temperature is increased accordingly; CO2 level: 22%