Студенттер мен жас ғалымдардың «фараби әлемі» атты халықаралық ғылыми конференциясы
STUDY ON SOLID WASTE PYROLYSIS COKE CATALYST FOR CATALYTIC
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Сборник конф Фараби Әлемі 2023 химфак-печать
| STUDY ON SOLID WASTE PYROLYSIS COKE CATALYST FOR CATALYTIC
CRACKING OF COAL TAR Bolat A. D. Supervisor: PhD Ospanova G. Suleyman Demirel University bolat.aiken2004@gmail.com Low value solid waste pyrolysis coke has been used as a catalyst for gas-phase tar catalytic cracking to improve tar yield and gas production. In the process of using direct combustion of coal, gas pollutants such as NOx and SO2, solid waste will be generated. Direct combustion of coal is not a method clean disposal. In recent times, the direct use of coal continues to decline, so it is replacing the development and use of liquid fuels. But using coal as a source of carbon, it is possible to produce liquid fuels through processes such as gasification and liquefaction. Liquefaction consists in catalytic cracking of coal tar into low carbon substances C2-C4 after pyrolysis. Gasification, the process of preparing combustible gases H2, CH4 and CO, then purify and synthesize liquid fuels.Pyrolysis is a low temperature dry distillation people's attention because of its low power consumption with high resin yield. Even low-grade coals with low value can be used to the greatest extent through low- temperature drying distillation, also can reduce the environmental impact of pollution caused by low-grade coal storage. A large amount of coal tar in China is in the stage of low processing and conversion capability. tar is rectified for industry. And according to different distillation ranges, phenolic oil, naphthalene oil, detergent oil, anthracene, petroleum and asphalt are separated. The heavy component of asphalt, which accounts for the largest proportion of resin, requires processing to achieve a high value-added use of resin. Catalytic cracking refers to the process of cracking, aromatization and other reactions of heavy resin components under the action of a catalyst and heat, and is converted into gas and light oil products. The reaction temperature is usually below 500°C, and the coke yield is below than the thermal cracking process. In the study of catalytic tar upgrading, it was found that metal oxides, molecular sieves, pyrolysis-coke and other catalysts can improve the quality of tar. But metal oxide-based catalytic materials have the disadvantages of catalyst poisoning, reduced activity, and heavy metal pollution. Molecular sieve catalysts have higher low temperature catalytic oxidation activity and even higher conversion rates at room temperature, but the preparation of a rational process of molecular sieve and activated carbon will be difficult and expensive. In addition, pyrolysis coke can realize waste disposal. From the viewpoint of waste disposal and environmental protection, pyrolysis coke catalyst is the preferred catalyst for catalytic cracking. «Фараби Әлемі» атты студенттер мен жас ғалымдардың халықаралық конференциясы 10 жүктеу/скачать 2,6 Mb. Достарыңызбен бөлісу:
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