13th Symposium on Green and Sustainable Technologies for Materials Manufacturing and Processing: Novel Approaches to Sustainable Manufacturing II
Sponsored by: ACerS Engineering Ceramics Division
Program Organizers: Surojit Gupta, University of North Dakota; Rajiv Asthana, University of Wisconsin; Hisayuki Suematsu, Nagaoka University of Technology; Mritunjay Singh, Ohio Aerospace Institute; Enrico Bernardo, University of Padova; Yiquan Wu, Alfred University; Zhengyi Fu, Wuhan University of Technology; Allen Apblett, Oklahoma State University; Tatsuki Ohji, National Institute of Advanced Industrial Science and Technology
Tuesday 2:00 PM
October 19, 2021
Room: A212
Location: Greater Columbus Convention Center
Session Chair: Surojit Gupta, University of North Dakota
2:00 PM
Now On-Demand Only - A Comparative Study of Vibration Signatures of FDM 3D Printers under Different States of Operation: Roshan Mishra1; Kunal Kate1; 1University of Louisvillle
In this study, the vibration analysis of four commercially available fused deposition modeling (FDM) 3D printers under different states of operation is investigated. Using an accelerometer attached at convenient locations near the nozzle mounts, the vibration signals are collected from five machine states, namely, normal extrusion, blocked nozzle, semi-blocked nozzle, material runout, and loading/unloading. Analyzing the signal metrics like root mean square (RMS), amplitude and peak frequency, the difference in vibration signature is observed for the different machine states. Furthermore, a comparative analysis of the 3D printers demonstrates the varying degrees of suitability of this monitoring approach. Results from this study show that vibration monitoring is an effective tool in the manufacturing process by providing insight into the machine condition during 3D printing.
2:20 PM
A Sustainable and Energy-efficient Electrochemical Technology for Dewatering of Cellulosic Nanomaterials: Huong Le1; Santosh Vijapur1; Timothy D. Hall1; E. Jennings Taylor1; Maria Inman1; Stephen Snyder1; Kim Nelson2; 1Faraday Technology; 2AVAPCO LLC
Cellulose is an abundantly available natural resource that can be utilized for a variety of industrial applications. Although cost-effective to produce, a need has been identified by manufacturers to develop energy-efficient dewatering of cellulosic nanomaterials, as cellulosic nanomaterials are not economical to ship long distances while containing significant water content (>95 wt.%). An electrochemically-assisted sustainable and energy efficient dewatering technology is currently under development by Faraday. Innovative reactor designs are utilized to demonstrate the feasibility of a cost-effective, industrially viable, and energy efficient ElectroDewatering approach capable of generating >50 wt.% final solid content for both cellulose nanocrystals (CNC) and cellulose nanofibers (CNF). The material properties (structure, particle size) were maintained through dewatering, and materials with ~25-30 wt.% final solids were successfully rehydrated and redispersed via vortexing. The pulse process approach reduced the energy use by at least 50% compared to thermal drying at similar dewatering performance.
2:40 PM
Low-cost Ceramic Composite Membranes for Ultrafiltration of Produced Water: Christine Watson1; Pankaj Sarin1; V. V. Rohit Bukka1; 1Oklahoma State University
Produced water, a waste product of the oil extraction process, is commonly disposed in underground injection wells due to its high oil and salt concentrations. The filtration and recycling of produced water has the potential to dramatically impact the environment by not only reducing the need for disposal wells, but by enhancing water security around the world. With their robust thermal and chemical stability as well as long lifespans, ceramic membranes are ideal for environmental waste applications such as produced water. A novel low-cost environmentally-friendly porous ceramic composite membrane has been developed using geopolymer with zeolite filler. The composition of the membrane was optimized for microstructure and filtration performance, while porosity was studied using scanning electron microscopy, mercury intrusion porosimetry, and MicroCT. Results from filtration studies confirmed the removal of particulate and dissolved impurities from produced water. Strategies for improving filter design and performance will be discussed.