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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.