Syngas production by CO2 reduction process

Data di pubblicazione

15-10-2013

Codice

CH.13.016.A

Data di priorità

02-08-2013

Titolare

Politecnico di Milano

Dipartimento

Department of Chemistry Materials and Chemical Engineering

Autori

Flavio Manenti, Sauro Pierucci (Politecnico di Milano), Lucio Molinari

Descrizione

The invention deals with a process to produce synthesis gas (syngas) by means of the reaction of the reduction of CO2 with H2S, which are both generated or separated in purification processes, at a relatively high temperature to allow the partial reduction of CO2 according to the following general reaction R: R: 2CO2+2H2S2CO+2H2+0.5S2+SO2 Since such a reaction R is globally endothermic, it is necessary to supply energy to the reaction system and it can be carried out according to 2 alternatives: • Without the use of O2 or air, in a furnace with one or more coils heated by radiating walls or directly; the reaction R takes place inside the coil • In presence of O2 or air in a thermal or regenerative reactor: In both the cases, the SO2 obtained as by-product from the reaction R can be converted in elemental sulfur by means of conventional Claus technologies, leading to the global reaction R1: R1: CO2+2H2SCO+H2+S2+H2O The invention deals with the chemical procedure as well as with the related production unit to generate syngas and/or sequestrating CO2 and/or H2S.

Campo di applicazione

The invention/apparatus can be applied, but not limited, to: • Syngas production with H2/CO ratio relatively high and, therefore, close to the required feed for chemical compounds such as ammonia, methanol, gas-to-liquid, coal-to-liquid, coal/biomass gasification, power generation, etc. • Sequestration of CO2 and/or H2S with high conversion yield (for natural gas plants, oil refineries, oil wells, desulfurization, gasification).

Vantaggi

• Completely removal of H2S. • Cut of CO2. • Production of syngas from two wastes (CO2 and H2S). • Reduction of environmental impact. • Increase of the performance and profit of sulfur recovery units, coal/biomass gasifiers, and processes that produce/use syngas. • Reduction of energy consumption. • Hydrogen production. • Production of chemical commodities using CO2 as feedstock.

Contatto

licensing.tto@polimi.it