Development of a technology for the production of hydrogen-enriched synthesis gas with waste-free processing of Ekibastuz coal
Ybray S. Dikhanbaev A. Dikhanbaev B. Mergalimova A. Georgiev A.
1 September 2023Elsevier Ltd
Energy
2023#278
This work aims to develop a unit of a new generation “reactor inversion phase-rotary kiln-gasifier” that enables: extraction from the slag 70% of Ge, Zn, and non-ferrous metals into sublimates; recovering 75% of iron, and using it as a reagent for creating additional mole of hydrogen; obtaining a smelt suitable for the production of building materials. A novel method for thermodynamic calculation of steam gasification of iron makes it possible to predict the specific yield of hydrogen by 63% more than with coal gasification is developed. During experiments on Ekibastuz coal, it is obtained syngas with a ratio H2/CO = 6.0 which is 2–3 times higher than in traditional gasifiers. It is predicted that in the case of joint coal-iron gasification, a ratio of H2/CO will be higher. The melting unit produces combustible gas with a calorific value of 7.0 MJ/nm3 and allows coal-iron gasification in fuel-free mode. An assessment shows: with the maximum wholesale price of natural gas (NG) on the market at 0.062$/m3, and in equivalent characteristics in relation to the NG, the cost of syngas produced in the system will be 0.025$/m3, which is 2–3 times lower than the cost of NG in Kazakhstan.
Dust-like gold , Germanium , High-hydrogenous syngas , Reactor inversion phase , Waste-free technology
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D. Serikbayev East Kazakhstan State Technical University, Ust-Kamenogorsk, Kazakhstan
Almaty University of Power Engineering and Telecommunication, Almaty, Kazakhstan
Saken Seifullin Kazakh Agrotechnical University, Astana, Kazakhstan
Department of General Engineering, University of Telecommunications and Posts, 1 Akad. Stefan Mladenov Str., Sofia, 1700, Bulgaria
D. Serikbayev East Kazakhstan State Technical University
Almaty University of Power Engineering and Telecommunication
Saken Seifullin Kazakh Agrotechnical University
Department of General Engineering
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