PI: David W. Mazyck 1 R&D Partners: Angela Lindner 1 and CY Wu 1 Industry Partners: MicroEnergy Systems, Inc., NCASI. University of Florida

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1 An Innovative Titania-Activated Carbon System for Removal of VOC's & HAP's from Pulp, Paper, Paperboard Mills, and Wood Products Facilities with In-Situ Regeneration Capabilities PI: David W. Mazyck 1 R&D Partners: Angela Lindner 1 and CY Wu 1 Industry Partners: MicroEnergy Systems, Inc., NCASI 1 University of Florida 1

2 Project Partners Describe your project partners, include the following for each partner: CY Wu, Ph.D. Activated carbon synthesis Angela Lindner, Ph.D. Biological studies MicroEnergy Systems, Inc. (Rick Sheahan) Pilot scale fabrication and sorbent synthesis NCASI (Ashok Jain) Project coordination and Educated team about pulp and paper mill industry 2

3 Technology Description Incineration of VOCs and HAPs is the most popular control technology, but is costly and results in the release of additional contaminants to the environment Project Goal: Develop a technology that is costeffective and energy-efficient at effectively removing VOCs and HAPs from air streams. Developing two photocatalytic sorbents TiO 2 coated activated carbon Silica-titania composites 3

4 Sorbent Synthesis Activated carbon or silica will adsorb VOCs and HAPs and concentrate these organic compounds close to the photocatalyst (TiO 2 ) Photocatalysis Oxidize organic compounds to CO 2 and H 2 O Hence an environmentally benign process TiO hv Æ e + h + 4

5 Reactor Schematics Rotary valve No. 3 Exhaust hood Bucket elevator Process gas outlet Primary Carbon Bed (holds 2,200 lbs) Rotary Valve No. 1 Process gas inlet FBCR exhaust to baghouse filter & Polisher Fluidized Bed Carbon Regenerator (FBCR) Approx 20 ft Perforated Rotating Plate * Horizontal position = air diffuser * Vertical position = carbon exits Top support rack UV bulb assemblies Bottom support rack Air duct to UV Light housing(s) Fluidizing bed fan Single or multiple UV Light(s) Rotary Valve No. 2 Inlet plenum Bottom screw conveyor Activated Carbon System NOTE: System is drawn to approximate scale based on a carbon adsorption rate of 0.1 lb- methanol per lb. GAC. At realistically higher adsorption rates, the system height could be considerably lower. Silica-Titania System 5

6 Methanol Removal (Bench-scale) Rotameter Water Bubbler Reactor UV Lamp STC Pellets Air cylinder Mass Flow Controller Air with 1000ppm methanol cylinder Chilled Impingers 6

7 Methanol Removal (Bench-scale) 1.0 [MeOH]effluent / [MeOH ] influent 0.8 Adsorption ( No UV) Adsorption and Oxidati on ( UV) Time (days) [MeOH] influent = 50 ppm v RH = 96% Temp = 55 deg. C 7

8 Methanol Removal (Pilot-scale) Temp. TVA 1000B TVA 1000B REACTOR Velocity Static Pressure Pressure Variable Frequency Drive Temp. Methanol/ Water Mix Pump Vaporizer Process Flow Diagram Reactor Photo 8

9 Methanol Removal (Pilot-scale) Experiment Inlet Temperature (deg. F) Effluent Temperature (deg. F) UV Intensity (mw/cm 2 ) Methanol Removal at Steady State Low Intensity (Potentiometer Setting = 22%) 75.6 ± ± ± 5.5% High (Potentiometer Setting = 100%) 72.6 ± ± ± 7% 9

10 Biotransformation of MeOH 10

11 Data Total Reduced Sulfur H2S Remova l efficiency SO4 Conversion Efficiency 80 % AC AC/UV TiO 2 /AC/UV Bed weight (grams) Silica-Titania Composites Removal capacity (ppm) 3.3± ± Removal efficiency (%) 33±6 87±

12 Market and Energy Savings Market: Pulp & paper mills and other generators of VOCs (e.g., paint spray booths) Commercialization Plan: The silica-titania technology is commercial Sorbent is mass produced Commercial units are currently being fabricated Energy Savings: Only power requirement is UV lamps (75 W/bulb) Sorbent lifetime (expected): 5 years 12

13 Other Benefits Low operation and maintenance costs Installation near source of VOCs/HAPs Removes requirement for expensive ductwork Environmentally benign 13

14 Commercialization Potential What commercial advantage(s) does your technology have over other technologies? Does not rely on escalating fuel costs and byproducts are inert What economic and technical criteria must be met for industry to adopt your technology? Willingness to accept new technology Describe market, regulatory, patent, and other commercialization barriers. Patents pending, technology is licensed, and commercial units are being fabricated 14

15 Pilot Reactor 15

16 Commercial System 16

17 Questions? 17