removal of ammonium hydroxide from ethanol
TRANSCRIPT
Salvaging Ethanol from a Stober Process Waste Stream
May 27th, 2016Project Manager: Robin Ihnfeldt
Group 09:Alan Tam Reiko Liu
Joseph Guarnes Melissa Nguyen
Project Statement
Stober Reaction: Si(OC2H5)4 + 2 H2O → SiO2 + 4 C2H5OH
90% Ethanol<2% Water<2% Ammonium Hydroxide<1% TEOS & Organics/Alcohols
GOAL: < 0.50% NH3
★ ~85% of the material cost accounts for ethanol
1.Distillation Column
< 99% NH3 removal10% EtOH Loss 3% Water
< 0.1% NH3 left96% EtOH~ 3% Water
T = 31 oCP = 1.2 atm
T = 78 oCP = > 1 atm
EtOH 95%Water 3%NH3 2%
T = 25 oCP = 1 atm
Distillation Cost & Material
2. Bubble Bed
& Carbon BedAIR
~ 0.5% NH396.5% Ethanol~ 3% Water
~ 1.0% NH396% Ethanol~ 3% Water
Temp28oC
Temp40oC
FEED
Bubble Bed’s Specifications Bubble Size = 0.5 cmContact time = 10s
Bubble Distributor
4 mm
5 ft
6 in
Cost and Material for Bubble Bed & Carbon Bed
➢ Plexiglass
➢ Temperature (28oC, 40oC)
➢ Observe the bubble formation for future adjustment
➢ Simple Design and Construction
➢ Activated Carbon $8.70/kg of C
Estimated Cost = < $10,000
Safety Consideration
Environmental Impact 1. Incineration 2. Repurpose
for fuel3. Repurpose for fertilizer
Potential Impact
I M I x M
I M I x M
I M I x M
Noise 2 2 4 2 1 2 2 1 2
Odor 2 2 4 2 2 4 2 1 2
Air pollution
4 3 12 4 3 12 4 2 8
Water pollution
5 1 5 5 1 5 5 2 10
Land pollution
3 0 0 3 0 0 3 1 3
Totals 25 23 25
Future Work & Recommendations
➢ Cost & Economic Analysis
➢ Find a method to accurately determine the amount of NH3 left in the solution
➢ Dr. Russ
➢ Dr. Fakhimi
Thanks for Listening!
Questions?
➢ Dr. Ihnfeldt
➢ Wesley Appleget, Melissa Averina & Danh Nguyen
Acknowledgements