Un processo a zero emissioni per produrre syngas

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

Process integration of green hydrogen: Decarbonization of chemical industries

Integrated water electrolysis is a core principle of new process configurations for decarbonized heavy industries. Water electrolysis generates H2 and O2 and involves an exchange of thermal energy. In this manuscript, we investigate specific traditional heavy industrial processes that have previously been performed in nitrogen-rich air environments. We show that the individual process streams may be holistically integrated to establish new decarbonized industrial processes. In new process configurations, CO2 capture is facilitated by avoiding inert gases in reactant streams. The primary energy required to drive electrolysis may be obtained from emerging renewable power sources (wind, solar, etc.) which have enjoyed substantial industrial development and cost reductions over the last decade. The new industrial designs uniquely harmonize the intermittency of renewable energy, allowing chemical energy storage. We show that fully integrated electrolysis promotes the viability of decarbonized industrial processes. Specifically, new process designs uniquely exploit intermittent renewable energy for CO2 conversion, enabling thermal integration, H2 and O2 utilization, and sub-process harmonization for economic feasibility. The new designs are increasingly viable for decarbonizing ferric iron reduction, municipal waste incineration, biomass gasification, fermentation, pulp production, biogas upgrading, and calcination, and are an essential step forward in reducing anthropogenic CO2 emissions