The Chartherm process,what’s in the name? |
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Authors: | L Helsen |
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Institution: | 1. KTH Royal Institute of Technology, Division of Surface and Corrosion Science, Stockholm 100 44, Sweden;2. Swerea KIMAB, Kista 164 40, Sweden;3. Vattenfall AB, Stockholm 169 92, Sweden;1. Agricultural and Food Engineering Department, IIT Kharagpur, 721302, India;2. Department of Experimental Statistics, Louisiana State University, Baton Rouge, LA 70803, USA;3. Uttar Banga Krishi Viswavidyalaya, Cooch Behar 736165, India;4. IRDM Faculty Centre, Ramakrishna Mission Vivekananda University, Kolkata 700103, India;5. Department of Plant and Soil Science, Texas Tech University, Lubbock, TX 79409, USA |
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Abstract: | Earlier research has identified the Chartherm process (Thermya, France) as a candidate for the best available technology to treat chromated copper arsenate (CCA) impregnated wood waste. This paper presents the working principle, the characteristics and the current state-of-knowledge related to the process, illustrating clearly the differences with pyrolysis and carbonisation processes. To emphasise the specific nature of the process, it has been given its own name ‘chartherisation’. The avoidance of tar and dioxin release, the role of the solid matrix in the metal behaviour and the separation process are described. Furthermore, the possible benefits of working at elevated pressure are discussed, based on the experience with charcoal production from coal and biomass. This paper shows that more fundamental research is needed to understand and model all mechanisms contributing to the characteristic nature of chartherisation, in order to control the dynamic behaviour and tune the operating conditions in the reactor on the quality of the products requested. |
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