Biomass as a renewable source can be converted into solid, liquid and gaseous biofuels for generating bioenergy. The use of lignocellulosic materials are widely due to the low cost and high yield in products such as gas and bio-oil however these feedstocks show often lower yield if compared with algal biomasses [1]. In fact, algae-based fuels are considered to be the most sustainable, renewable, effective and environment friendly response to climate change and food-feed security. Pyrolysis is a promising process for to convert biomass mainly into liquid fuel (bio-oil) and solid material (bio-char). These products can be used directly or after processing as fuel or they can be used as source for chemicals and value-added products. In this context, authors first investigated on the feasibility to convert a Mediterranean sea-plant (Posidonia Oceanica) into bio-oil and bio-char by slow pyrolysis process of in the range temperature: 400-600 °C [2]. Yields of bio-char and bio-oil resulted comparable with those obtained by woody biomass. Furthermore, chemical-physical characteristics of bio-char resulted very interesting for soil application due to its characteristics of stability and alkalinity (pH = 10.75 at Tpyrol. = 500 °C). Successively, the effect of different "home-made" catalytic materials (HZSM-5, CeO2, Ni-based catalyst) on pyrolysis process was evaluated in order to produce high-quality bio-oil. Results highlighted that the bio-oil produced in presence of catalyst has a lower content of acids, oxygen and high hydrocarbons than that obtained with a blank test. In particular, using CeO2 catalyst were recorded an i) high bio-oil yield (51.15 wt.%) and ii) low oxygen content (6.87 wt.%). On the other side, the system Ni/HZSM-5 resulted the suitable catalyst in terms of bio-oil hydrocarbons content (about 34.18 %). References [1] S. Cheng, L. Wei, X. Zhao, Y. Huang, D. Raynie, C. Qiu, J. Kiratu, Y. Yu, AIMS Energy 2015:3:227 [2] V.Chiodo, G. Zafarana, S. Maisano, S. Freni, F. Urbani, Fuel 2016:164:220
Mediterranean sea-plant pyrolysis for bio-fuels production
Vitaliano Chiodo;Susanna Maisano
2017
Abstract
Biomass as a renewable source can be converted into solid, liquid and gaseous biofuels for generating bioenergy. The use of lignocellulosic materials are widely due to the low cost and high yield in products such as gas and bio-oil however these feedstocks show often lower yield if compared with algal biomasses [1]. In fact, algae-based fuels are considered to be the most sustainable, renewable, effective and environment friendly response to climate change and food-feed security. Pyrolysis is a promising process for to convert biomass mainly into liquid fuel (bio-oil) and solid material (bio-char). These products can be used directly or after processing as fuel or they can be used as source for chemicals and value-added products. In this context, authors first investigated on the feasibility to convert a Mediterranean sea-plant (Posidonia Oceanica) into bio-oil and bio-char by slow pyrolysis process of in the range temperature: 400-600 °C [2]. Yields of bio-char and bio-oil resulted comparable with those obtained by woody biomass. Furthermore, chemical-physical characteristics of bio-char resulted very interesting for soil application due to its characteristics of stability and alkalinity (pH = 10.75 at Tpyrol. = 500 °C). Successively, the effect of different "home-made" catalytic materials (HZSM-5, CeO2, Ni-based catalyst) on pyrolysis process was evaluated in order to produce high-quality bio-oil. Results highlighted that the bio-oil produced in presence of catalyst has a lower content of acids, oxygen and high hydrocarbons than that obtained with a blank test. In particular, using CeO2 catalyst were recorded an i) high bio-oil yield (51.15 wt.%) and ii) low oxygen content (6.87 wt.%). On the other side, the system Ni/HZSM-5 resulted the suitable catalyst in terms of bio-oil hydrocarbons content (about 34.18 %). References [1] S. Cheng, L. Wei, X. Zhao, Y. Huang, D. Raynie, C. Qiu, J. Kiratu, Y. Yu, AIMS Energy 2015:3:227 [2] V.Chiodo, G. Zafarana, S. Maisano, S. Freni, F. Urbani, Fuel 2016:164:220I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
