Gasification of Liquid Hydrocarbon Waste by the Ultra-Superheated Mixture of Steam and Carbon Dioxide: A Thermodynamic Study

Sergey M. Frolov (), Konstantin S. Panin and Viktor A. Smetanyuk
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Sergey M. Frolov: Department of Combustion and Explosion, Semenov Federal Research Center for Chemical Physics, Moscow 119991, Russia
Konstantin S. Panin: Institute for Laser and Plasma Technologies, National Research Nuclear University MEPhI, Moscow 115409, Russia
Viktor A. Smetanyuk: Department of Combustion and Explosion, Semenov Federal Research Center for Chemical Physics, Moscow 119991, Russia

Energies, 2024, vol. 17, issue 9, 1-20

Abstract: The thermodynamic modeling of waste oil (WO) gasification by a high-temperature gasification agent (GA) composed of an ultra-superheated H 2 O/CO 2 mixture is carried out. The GA is assumed to be obtained by the gaseous detonation of fuel–oxidizer–diluent mixture in a pulsed detonation gun (PDG). N-hexadecane is used as a WO surrogate. Methane or the produced syngas (generally a mixture of H 2 , CO, CH 4 , CO 2 , etc.) is used as fuel for the PDG. Oxygen, air, or oxygen-enriched air are used as oxidizers for the PDG. Low-temperature steam is used as a diluent gas. The gasification process is assumed to proceed in a flow-through gasifier at atmospheric pressure. It is shown that the use of the detonation products of the stoichiometric methane–oxygen and methane–air mixtures theoretically leads to the complete conversion of WO into a syngas consisting exclusively of H 2 and CO, or into energy gas with high contents of CH 4 and C 2 -C 3 hydrocarbons and an LHV of 36.7 (fuel–oxygen mixture) and 13.6 MJ/kg (fuel–air mixture). The use of the detonation products of the stoichiometric mixture of the produced syngas with oxygen or with oxygen-enriched air also allows theoretically achieving the complete conversion of WO into syngas consisting exclusively of H 2 and CO. About 33% of the produced syngas mixed with oxygen can be theoretically used for PDG self-feeding, thus making the gasification technology very attractive and cost-effective. To self-feed the PDG with the mixture of the produced syngas with air, it is necessary to increase the backpressure in the gasifier and/or enrich the air with oxygen. The addition of low-temperature steam to the fuel–oxygen mixture in the PDG allows controlling the H 2 /CO ratio in the produced syngas from 1.3 to 3.4.

Keywords: gasification; organic waste; waste oil; ultra-superheated H 2 O/CO 2 gasification agent; pulsed detonation gun; syngas; energy gas; self-feeding (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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