title: Impact of torrefaction and low-temperature carbonization on the properties of biomass wastes from Arundo donax L. and Phoenix canariensis.
abstract: The impact of torrefaction and low-temperature carbonization on the properties of biomass wastes from Arundo donax L. and Phoenix canariensis was studied. Thermal treatments were performed at temperatures from 200°C to 350°C during 15 to 90min and temperature was the parameter that more influenced mass and energy yields as well as biochar composition. Torrefaction reduced moisture, volatile matter, O/C and H/C ratios of the biomass, while increasing heating value, ash content and fixed carbon. For torrefaction at 250°C or higher temperatures grindability of the biochars was significantly improved. The low volatile matter contents and high ash contents of these biochars restricts their use as solid fuels but they can be valorized otherwise. Raw biomasses and the biochars torrefied at 200°C could remove methylene blue from an aqueous solution, in fast adsorption test with a contact time of only 3s, with efficiencies higher than 50%.
authors: Mechanical Engineering and Resource Sustainability Center, Department of Science and Technology of Biomass, Faculty of Sciences and Technology, New University of Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal. Electronic address: rjc07189@campus.fct.unl.pt.
authors: Ricardo
authors: R
authors: Correia
authors: Mechanical Engineering and Resource Sustainability Center, Department of Science and Technology of Biomass, Faculty of Sciences and Technology, New University of Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal.
authors: Margarida
authors: M
authors: Gonçalves
authors: Mechanical Engineering and Resource Sustainability Center, Department of Science and Technology of Biomass, Faculty of Sciences and Technology, New University of Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal.
authors: Catarina
authors: C
authors: Nobre
authors: Mechanical Engineering and Resource Sustainability Center, Department of Science and Technology of Biomass, Faculty of Sciences and Technology, New University of Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal.
authors: Benilde
authors: B
authors: Mendes
mesh_terms: D000327:Adsorption; D018533:Biomass; D002244:Carbon / Q000378:metabolism*; D002606:Charcoal / Q000737:chemistry / Q000493:pharmacokinetics; D003080:Cold Temperature; D006358:Hot Temperature; D017745:Incineration; D065749:Phoeniceae / Q000737:chemistry / Q000378:metabolism*; D006109:Poaceae / Q000737:chemistry / Q000378:metabolism*; D013696:Temperature; D014866:Waste Products
chemical_list: D014866:Waste Products; C540010:biochar; D002606:Charcoal; D002244:Carbon
keywords: Arundo donax L. and Phoenix canariensis; Dye adsorption; Grindability; Mass and energy yields; Torrefaction and carbonization