Study of fuel insolubles: Formation conditions and characterization of copper compounds |
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| Affiliation: | 1. Department of Chemistry, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rua Marquês de São Vicente, 225, Gávea, 22453-900 Rio de Janeiro, RJ, Brazil;2. Cenpes/Petrobras, Cidade Universitária, Avenida 1, Quadra 7, Ilha do Fundão, 21910-900 Rio de Janeiro, RJ, Brazil;1. Faculty of Chemical Engineering and Food Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam;2. NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam;3. Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, Ha Noi City, Viet Nam;4. Center of Excellence for Biochemistry and Natural Products, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam;1. Department of Mechanical Engineering, Vel Tech Rangarajan Dr Sagunthala R&D Institute of Science and Technology, Avadi, Chennai, Tamil Nadu, 600062, India;2. Department of Automobile Engineering, VELS Institute of Science, Technology & Advanced Studies (VISTAS), Chennai, Tamil Nadu, India;1. Department of Automobile Engineering, Hindustan Institute of Technology and Science, Chennai, India;2. Department of Computer Science Engineering, Hindustan Institute of Technology and Science, Chennai, India;3. Department of Electronic Communication Engineering, Chaithanya Bharathi Institute of Technology, Gandipet, Hyderabad, India;4. Department of Electronics and Communication Engineering, Mahatma Gandhi Institute of Technology, Gandipet-500057, Telangana, India;5. Department of Research & Development, NoobTron Pvt.Ltd, Chennai, India;1. Department of Mechanical Engineering, Hindustan Institute of Technology & Science, Padur, Chennai, India;2. Department of Research & Development, NoobTron Pvt. Ltd, Chennai 600064, India;3. Department of Mechanical Engineering, GITAM (DEEMED), Visakhapatnam 530045, India;4. Department of Physics, MohsinbhaiJaveri College, Wadsa, Gadchiroli, M.S 441207, India;1. Chemical Engineering Department. Research Institute for Chemical and Environmental Technology (ITQUIMA), University of Castilla La Mancha, 13071 Ciudad Real, Spain;2. Chemical Engineering Department, Faculty of Chemical Sciences and Technology, University of Castilla La Mancha, 13071 Ciudad Real, Spain;1. Department of Mechanical Engineering, DIT University, Dehradun, India;2. Department of Mechanical Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, India |
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| Abstract: | The solids formed in the systems containing copper in different oxidation states, in the presence and absence of hexanoic acid and dodecanethiol, together and separately, at room temperature, were studied. The experiments were performed in a mineral oil matrix, free of sulfur compounds and metals; a diesel oil matrix; and the reagents alone, without any matrix. The deposits formed were analyzed by elemental analysis (EA), infrared spectroscopy (IR), thermogravimetric analysis (TGA) and total copper by inductively coupled plasma-optical emission spectrometry (ICP-OES), for their identification and determination of the probable structures. In samples containing both hexanoic acid and dodecanethiol, when there is copper(I), anhydrous copper(II) hexanoate is preferentially formed, but in samples of copper(II), copper(II) mercaptate is formed first. In samples of metallic copper in mineral oil matrix, no deposit formations occur. In all cases in which deposits were formed, they were the same as in diesel oil matrix. |
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