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Meeting Materials Science & Technology 2020
Symposium Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
Presentation Title Microwave-assisted Hydrothermal Carbonization of Switchgrass and Low Rank Coals for Solid Fuel Production
Author(s) Pranjali Muley, Christina Wildfire, Dushyant Shekhawat
On-Site Speaker (Planned) Pranjali Muley
Abstract Scope Hydrothermal carbonization is a thermochemical process used to convert biomass to carbon materials and solid fuels. Switchgrass biomass and low rank coals (lignite) were treated by co-hydrothermal carbonization to produce hydrochars using advanced microwave heating. We studied one coal to biomass ratios (50% biomass loading) at three different processing temperatures (220, 240, 250C) and reaction times (20, 30 and 40 min) in tap water as solvent in a batch microwave reactor. The resulting liquid and solid products were analyzed for yields and quality. Co-HTC results in high carbon containing hydrochar. Mass hydrochar yields decrease with increasing temperature but carbon content of char increases as temperature and processing times increase. Addition of coal has a synergistic effect during co-HTC, enhancing the rate of carbonization. Microwave heating reduced the processing times compared to conventional heating and promotes high-value hydrochar production.


Deforming Polycrystalline Ceramics by Dislocation Based Plastic Deformation
Engineering Far-from-Equilibrium Materials Using Electromagnetic Fields
Ionic and Mixed Ionic Electronic Conductor Oxides for Microwave Active Catalysis
Laser Ablation & Passivation of Aluminum Alloys
Laser Processing Cokes and Chars
Microwave-assisted Hydrothermal Carbonization of Switchgrass and Low Rank Coals for Solid Fuel Production
Recent Developments In Microwave-metal Discharge Based Machining Process and Associated Challenges
Study of Mechanical Properties of Microwave Processed Biodegradable Metal Composites
The Effect of Microwave Sintering on Additively Manufactured Ceramics
The Use of Alternate Electromagnetic Fields to Control Biofilm

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