12th International Symposium on Green and Sustainable Technologies for Materials Manufacturing and Processing: Sustainable Manufacturing from Metal and Ceramics based Precursor Materials
Sponsored by: ACerS Engineering Ceramics Division
Program Organizers: Surojit Gupta, University of North Dakota; Rajiv Asthana, University of Wisconsin; Mritunjay Singh, Ohio Aerospace Institute; Tatsuki Ohji, AIST; Enrico Bernardo, University of Padova; Zhengyi Fu, Wuhan University of Technology; Hisayuki Suematsu, Nagaoka University of Technololgy; Tatami Junichi, Yokohama national university; Yiquan Wu, Alfred University; Allen Apblett, Oklahoma State University
Wednesday 8:00 AM
November 4, 2020
Room: Virtual Meeting Room 20
Location: MS&T Virtual
Session Chair: Allen Apblett, Oklahoma State University; Catherine Bishop, University of Canterbury
8:00 AM Invited
Amino Acid-based Single Source Precursors for Bimetallic Molybdates: Allen Apblett1; Fahad Alqahtani1; 1Oklahoma State University
Bimetallic molybdenum-containing oxides have a wide range of applications including numerous catalytic reactions. Previous work has shown that the preparation method has a marked influence on the physical and chemical properties of these kinds of metal oxides. Accordingly, a facile, low-temperature synthetic approach for the preparation of molybdenum-containing nanocrystalline bimetallic oxide catalysts as powders or on supports via the pyrolysis of water-based bimetallic single-source precursors will be reported. The precursors result from the reaction of aqueous solutions of first row transition metal salts of amino acids. They crystalize with the exact ratio of divalent metal to molybdenum for formation of MMoO4. TGA and XRD analysis has shown that the thermal decomposition of these single source bimetallic precursors produces the target materials. Several potential green catalytic reactions will be discussed including oxidative dehydrogenation reactions, photocatalytic destruction of dyes, and production of petrochemicals via pyrolysis of biomass
8:40 AM
Development of a Separation Process of NBR/HNBR Rubber from Metal Substrate: Sarah Scardelatto1; Mariana Nascimento2; 1Zanaflex; 2Fundação Santo André
The objective of this project consists in the development of a process for separating the rubber NBR/ HNBR from the metal substrate. The methodology will consist in choosing, presentation, separation, identification and classification of the material; performing cryogenic and solubility tests, record the results, quantitative and economic survey, data processing, analysis and discussion of the results and preparation, structuring and presentation of the report and the thesis. The results showed that a bath in polar acetic acid, above room temperature, followed by a wash in a basic pH bath and further drying, generates the expected results, with complete separation of the parts without attack the steel and with little change on the structure of rubbers. With this, the process becomes attractive because, in addition to the considerable decrease in the volume of discarded material, the by-products can be reused in the process itself, with recycling and reuseof materials.
9:00 AM Invited
Ceramics for the Circular Economy: Monica Ferraris1; Milena Salvo1; Elham Sharifikoloui1; 1Politecnico di Torino – Italy
The continuous growth of the global economy has led to mass-production of short-lived products, over-exploitation of scarce resources and generation of huge amounts of waste. The Circular Economy, has the goal of reducing resource consumption through reuse, and recycling of materials and maximizing energy efficiency. Ceramics play a significant role in it: after recovery of recyclable materials, incineration is often used to recover part of the energy and to reduce municipal solid waste mass and volume. However, incineration generates by-products such as bottom and fly ash which is subjected to environmental. Thermal treatment, and in particular, vitrification is proved to be effective in reducing their leachability. Nevertheless, vitrification is a costly process. In an attempt to adapt to the circular economy, we aim to utilize vitrified bottom ash and fly ash in the construction industry to bring added value after the costly vitrification while confirming their environmental safety.
9:40 AM
Conditions for electrolytic reduction of titanium from binary mixed-oxide melt: Catherine Bishop1; Nic Weaver1; Samuel Martin-Treceno1; Aaron Marshall1; Matthew Watson1; 1University of Canterbury
Molten oxide electrolysis has the potential to be a more efficient method to produce metals with near zero CO2 emissions compared to traditional methods. If metals can be produced from industrial by-products, such as steelmaking slags, then the environmental and sustainability benefits are considerable. In previous work, we demonstrated the reduction of Ti from a pseudo-quinary metal oxide melt. That showed that ionic transport in the melt was sufficient without the addition of a salt, such as the calcium chloride required for the FFC Cambridge process. In this work, we demonstrate that Ti can be reduced from sodia-titania melts under conditions predicted by FactSage. This operating window would not be predicted using ideal solution models. Based on this work, we discuss the characteristics of high temperature electrolytic melts that allow for the extraction of metals.