Life cycle inventory for thermal treatment of waste solvent from chemical industry: a multi-input allocation model |
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| Institution: | 1. Laboratory of Technical Chemistry, Swiss Federal Institute of Technology, ETH Hönggerberg, CH-8093 Zürich, Switzerland;2. EAWAG/ETH Department W+T, CH-8600 Dübendorf, Switzerland;1. Institute of Pharmaceutical Sciences, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany;2. University of Vienna, Department of Analytical Chemistry, Währinger Strasse 38, A-1090 Vienna, Austria;1. Environmental Research Institute, National University of Singapore, Singapore;2. Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore;3. School of Mechanical Engineering, Shanghai Jiao Tong University, China;1. Johann Radon Institute for Computational and Applied Mathematics, Austrian Academy of Science, Altenberger Str. 69, 4040 Linz, Austria;2. Research Institute for Symbolic Computation, Johannes Kepler University Linz, Schloss Hagenberg, 4232 Hagenberg, Austria;3. Unit Geometry and CAD, University of Innsbruck, Technikerstr. 13, 6020 Innsbruck, Austria;1. State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy & Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, PR China;2. Department of Environmental Science & Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, PR China |
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| Abstract: | Waste solvent incineration is an important issue in life cycle assessments (LCAs) dealing with chemical products and/or processes. Nearly all chemical products and processes involve organic solvents, and incineration is often the favoured solution to waste solvent treatment as it can deal with a large variety of solvent types and quantities. At present, there are no generic models for waste solvent incineration which allow integrating this technology as a unit process in LCA. As waste solvents as a rule are incinerated as a mixture of several solvents, an allocation problem occurs: measurements of the consumption of ancillaries and energy carriers, and of emission of pollutants and generation of co-products, always refer to the mixture of waste solvents. However, in LCAs usually waste specific data is needed. To solve this problem we developed a multi-input allocation model of the incineration process. A comprehensive case study on a waste solvent incineration plant from chemical industry provided the necessary data. The results from the multi-input allocation modelling are consumption and emission factors which facilitate the calculation of solvent specific life cycle inventory results. |
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