Energy Technologies: CO2 Management and Sustainable Metallurgical Processes
Sponsored by: TMS Extraction and Processing Division, TMS Light Metals Division, TMS: Energy Committee, TMS: Pyrometallurgy Committee
Program Organizers: Lei Zhang, University of Alaska Fairbanks ; Jaroslaw Drelich, Michigan Technological Univ; Neale Neelameggham, IND LLC; Donna Guillen, Idaho National Laboratory; Nawshad Haque, CSIRO; Jingxi Zhu , Carnegie Mellon University; Ziqi Sun, Queensland Univ of Tech; Tao Wang, Nucor Steel; John Howarter, Purdue University; Fiseha Tesfaye, Åbo Akademi University

Thursday 8:30 AM
March 2, 2017
Room: 13
Location: San Diego Convention Ctr

Session Chair: Donna Guillen, Idaho National Laboratory; Cong Wang, Northeastern University; Fiseha Tesfaye, Åbo Akademi University

8:30 AM  Invited
Large Scale Energy Storage through Heat Balance Shifts at Aluminium Smelters: Mark Taylor1; 1University of Auckland
    Aluminium smelters and other industries have increasingly suffered in recent years from an inflexibility in regard to the quantum of power required continuously in their operation. A need to reduce electricity supply by 10-20% at a smelter causes major disruption or interruption, including to its customers and surrounding communities. This applies equally to smelters whatever their size and technology because of the uncontrolled heat dissipation from each smelting cell. A patented technology for regulating heat dissipation now exists for smelters. This technology allows extraction of more heat from cells, but also controlled insulation if the cell heat dissipation must be reduced. The opportunity to turndown amperage in response to changing power availability, or in response to changing power or metal prices now exists. The practicality and degree of the heat balance shift required to achieve this turn down (and turn up) capability is explored in this paper.

9:00 AM  Invited
Transforming the Way Electricity is Consumed during the Aluminium Smelting Process: Mark Dorreen1; Linda Wright2; Geoff Matthews3; Pretesh Patel4; David Wong1; 1Light Metals Research Centre, The University of Auckland; 2One World Consulting Limited; 3Energia Potior Limited; 4Auckland Uniservices Limited
    This paper examines the potential impact the newly developed EnPot aluminium smelter technology could have on the sustainability and economics of primary aluminium production. It also explores how the EnPot technology can be used to help the aluminium smelting industry to be part of the solution of accommodating increased intermittency in our future renewable energy generation, post COP 21. The EnPot system provides for the first time, dynamic control of the heat balance of aluminium smelting pots across the potline, so that energy consumption and aluminium production can be increased or decreased by as much as plus or minus 30% almost instantaneously. This enables a new way of thinking to emerge when considering the relationship the aluminium smelter plays in connection to the power grid.

9:20 AM  Invited
Disordered 3D Multi-layer Graphene Anode Material from CO2 for Sodium-Ion Batteries: Hui (Claire) Xiong1; Kassiopeia Smith1; Wei Wei2; Yun Hang Hu2; 1Boise State University; 2Michigan Technological University
    We report the application of disordered 3D multi-layer graphene material, synthesized directly from CO2 gas via its reaction with Li at 550 ˚C, as an anode for sodium-ion battery for a sustainable and greener future. Furthermore, the intercalation of sodium into the defective graphene structure is discussed through electrochemical characterization, Raman spectroscopy, and small-angle X-ray scattering experiments. The disordered multi-layer graphene electrode demonstrated a promising rate capability and cyclibility. The novel approach to synthesize disordered 3D multi-layer graphene from CO2 gas make it attractive not only as an anode material for sodium-ion batteries but also to mitigate CO2 emission.

9:40 AM  
Power Generation Using Combined In-situ Combustion with CO2 Separation and Sequestration: Subodh Das1; Jeff Saey2; 1Phinix,LLC; 2University of Kentucky
     The current practice of producing electricity by transporting underground fossil fuels (coal mining, oil and natural gas drilling) above ground; followed by above ground combustion and subsequent underground CO2 sequestration; has historically presented cost and environmental problems for handling, processing and disposing large quantities of undesirable CO2 emissions and ash. The proposed transformational and marketplace disruptive technology, leaves CO2 and ash generated from in-situ combustion of fossil fuels underground for subsequent local separation and sequestration, transports thermal energy from the underground combustion to above ground, for power generation. It is expected that the proposed concept will be more cost effective and energy efficient than the conventional process while eliminating CO2 emissions. If successfully implemented, this concept may have impact similar to horizontal mining and hydraulic fracturing on enhancing U.S. energy security. This paper will discuss some of the preliminary calculations.

10:00 AM Break