Sludge coming from cleaning processes of waste-water, Municipal Solid Waste (MSW), and Refuse Derived Fuel (RDF) can be exploited for producing energy because of their heating value. Cleaning the produced syngas is important because of environmental troubles, which are possible if the concentration of noxious compounds is higher than that fixed by law. Besides, noxious compounds erode the turbine in producing electric energy and both temperature and injected gas speed make this erosion heavier. A two-stage gasifier is resulted able to produce a clean syngas in spite of the presence of PVC or other organic compounds containing sulphur or chlorine in the feeding blend, directly. The thermodynamic analysis could be an useful tool for indicating the best way for optimising the performance of the two-stage gasifier with respect on the heavy metals residues into the produced syngas, taking the presence of a Ni catalyst into account. The main results indicate that preheating is not efficient because not all the heavy metals evaporate during this process because the temperature can not exceed 300 °C to prevent any premature cracking of the feeding blend.
Heavy metals behaviour in a gasification reactor / M., Paolucci; C., Borgianni; DE FILIPPIS, Paolo. - STAMPA. - (2011), pp. 111-114. (Intervento presentato al convegno 4th WSEAS International Conference on Engineering Mechanics, Structures, Engineering Geology, EMESEG'11, 2nd International Conference on Geography and Geology 2011, WORLD-GEO'11, 5th International Conference on EDEB'11 tenutosi a Corfu Island; Greece nel 14 July 2011 through 16 July 2011).
Heavy metals behaviour in a gasification reactor
DE FILIPPIS, Paolo
2011
Abstract
Sludge coming from cleaning processes of waste-water, Municipal Solid Waste (MSW), and Refuse Derived Fuel (RDF) can be exploited for producing energy because of their heating value. Cleaning the produced syngas is important because of environmental troubles, which are possible if the concentration of noxious compounds is higher than that fixed by law. Besides, noxious compounds erode the turbine in producing electric energy and both temperature and injected gas speed make this erosion heavier. A two-stage gasifier is resulted able to produce a clean syngas in spite of the presence of PVC or other organic compounds containing sulphur or chlorine in the feeding blend, directly. The thermodynamic analysis could be an useful tool for indicating the best way for optimising the performance of the two-stage gasifier with respect on the heavy metals residues into the produced syngas, taking the presence of a Ni catalyst into account. The main results indicate that preheating is not efficient because not all the heavy metals evaporate during this process because the temperature can not exceed 300 °C to prevent any premature cracking of the feeding blend.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
