A process for producing syngas comprising the steps of: a) burning methane or natural gas with oxygen and optionally with water steam for producing flue gas comprising CO2 and H2O according to the following reaction: CH4 + 2O2 → CO2 + 2H2O b) cooling the flue gas coming from the previous step by heat exchange with a water stream which is thereby vapourised; c) condensing and removing water from the flue gas, coming from step b), thereby obtaining a mixture consisting essentially of CO2; d) carrying out an electrolysis of a steam stream in a solid oxide electrolytic cell (SOEC), whereby steam is split into oxygen gas and hydrogen gas according to the following reaction scheme: H2O(g)→ H2+1/2O2 e) separating and drying hydrogen gas f) carrying out a reverse water gas shift reaction between CO2 coming from step c) with H2 coming from step (e) according to the following scheme: [3] CO2+ H2→ CO+H2O. With this process it is possible to produce high quality syngas with zero flue gases emissions and without conducting the endothermal steam reforming reactions.

Un processo a zero emissioni per produrre syngas

F. Manenti;F. Bisotti;
2022-01-01

Abstract

A process for producing syngas comprising the steps of: a) burning methane or natural gas with oxygen and optionally with water steam for producing flue gas comprising CO2 and H2O according to the following reaction: CH4 + 2O2 → CO2 + 2H2O b) cooling the flue gas coming from the previous step by heat exchange with a water stream which is thereby vapourised; c) condensing and removing water from the flue gas, coming from step b), thereby obtaining a mixture consisting essentially of CO2; d) carrying out an electrolysis of a steam stream in a solid oxide electrolytic cell (SOEC), whereby steam is split into oxygen gas and hydrogen gas according to the following reaction scheme: H2O(g)→ H2+1/2O2 e) separating and drying hydrogen gas f) carrying out a reverse water gas shift reaction between CO2 coming from step c) with H2 coming from step (e) according to the following scheme: [3] CO2+ H2→ CO+H2O. With this process it is possible to produce high quality syngas with zero flue gases emissions and without conducting the endothermal steam reforming reactions.
2022
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1213333
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