Download presentation
Presentation is loading. Please wait.
Published byJames Badham Modified over 9 years ago
1
Ammonia Jeff Roberge (Helmenstine)
2
Introduction Hazardous Waste A solid material that poses a threat to human and environmental health (increase in mortality, irreversible illness) due to physical characteristics Causes environmental degradation in large quantities Due to improper treatment of wastes 80,000 chemicals used in industry worldwide
3
Introduction Types of hazardous wastes Ignitable- liquid with flashpoint under 140 degrees F, flammable gas, or easily ignited solid Corrosive- aqueous waste with pH less than or equal to 2, greater than or equal to 12.5, liquid waste that corrodes steel.25 inch/yr
4
Introduction Types (Cont.) Reactive- solid that is unstable, or reacts violently with water, makes toxic gas in combination with other materials Toxic- waste containing certain substances above a maximum safe concentration (“Waste Labels”)
5
Uses Ammonia- NH 3 used in: Cleaning agents Rocket fuel Drinking water purifiers Fertilizers Stack Emission Control Systems (neutralize sulfur oxides) Feeds yeast in beverage companies pH control in wastewater treatment plants Industrial refrigeration systems Pulping of paper Extraction of metals from their ores Explosives (USA)
6
Uses Farming Up to 200 lbs of ammonia used per acre in 1 growing season Used in liquid solutions (ammonia, ammonium nitrate, urea, aqua ammonia) Selective Catalytic Reduction Ammonia is the reducing agent in the stack stream flow-causes 80 to 90% emission reductions of NOx (“Selective”)
7
Manufacturing Manufacturing process Burrup Ammonia Plant: http://www.youtube.com/watch?v=wjfcZ1T_ QyY. http://www.youtube.com/watch?v=wjfcZ1T_ QyY http://www.youtube.com/watch?v=wjfcZ1T_ QyY A plant can produce 1854 tons a day (“Ammonia”)
8
Manufacturing Haber-Bosch process Typical plant turns natural gas (methane, LPG) into hydrogen in gas form through steam reforming Then combined with nitrogen in air to form liquefied anhydrous ammonia Byproducts CO, CO2, CH4, uses natural gas, heating processes use gas H2 + RSH → RH + H2S(gas) H2S + ZnO → ZnS + H2O CH4 + H2O → CO + 3H2 CO + H2O → CO2 + H2 CO + 3H2 → CH4 + H2O CO2 + 4H2 → CH4 +2H2O 3H2 + N2 → 2NH3
9
Manufacturing (“Ammonia Production”) 2002- 2,000 tons H2 was produced in Iceland Uses hydrolysis to split water to get hydrogen
10
Side Effects It is a corrosive substance Only harms areas exposed to it At high levels, causes burns on contact Can cause blindness, lung disease, death, or chemical discolorations No proof it causes cancer Its ions are more mild No evidence of birth defects
11
Side Effects Effects In environment, alkaline plants uptake ammonia as a source of Nitrogen At 5 ppm, it is toxic to fish Bacteria Convert Ammonia into ions in ground and it is recycled It occurs naturally- 1-5 ppb in air, <6 ppm in water Ammonia lasts 1 week in air In Haz. waste sites: 1-1000 ppm in soil, up to 16 ppm in water >50 ppm you can smell in the air 35 ppm you can taste in liquid Solutions 25% or higher are corrosive (“The Nitrogen”)
12
Side Effects Causes plant growth due to fertilizer Up to 3,000 ppm in farm soil after applied Fish and aquatic animals burned Quickly recycled when in ground In body, turned into safe chemicals and urinated out after a few days (The Oscar Spot) NH3 burns on eyes
13
Regulations State regulations Handler of material must have completed an anhydrous Ammonia training program every 3 years All storage areas need eyewash, shower or 150 gallons of water nearby Transfer hoses can be only a max of 30 ft Transfer vehicles and tanks have a max load of 6,000 gallons Holding tank minimum distance of 200 feet from property line
14
Regulations EPA, Occupational Safety and Health Administration (OSHA), Food and Drug Administration (FDA) regulate 100 lbs spill of NH3 needs to be reported 1000-5000 lbs spill ammonium salt needs to be reported Suggested 8-hr exposure limit at 25 ppm 25 min at 35 ppm 5 min at 50 ppm
15
Regulations Occupational Safety and Health Act (OSHA) Equipment must meet OSHA standards Can be inspected at anytime with 24 hours notice 5 gallons of water mounted on equipment Goggles, gloves required
16
Areas Impacted Ammonia found in 137 of 1647 National Priority List sites Naturally- 1-5 ppb in air Farm land up to 200 lbs per acre (3000 ppm) CT River- Watersheds Naturally found in urine and body Does not bioaccumulate Found in microorganisms, plants, bacteria Fish, humans, mammals that ingest are injured
17
Areas Impacted Found in food Ammonium bicarbonate 0.04-3.2% (in baked goods, snacks) Ammonium carbonate 2.0% (in gelatins) Ammonium chloride 0.001% (baked goods) Ammonium hydroxide 0.6-0.8% (cheeses, gelatin) 0.012% in condiments
18
Areas Impacted Oil burned to produce high temps. to make reaction CO2, CO, CH4, Sulfur emissions Electricity needed for electrolysis-uses oil (“Process Plants”)
19
Conclusion Natural material only deadly in large quantities Necessary for nitrogen cycle and plant nitrogen uptake As long as it is properly handled, there is no real problem
20
Hazardous Wastes What- Collection of hazardous materials Where- CRERPA Rte. 9, Exit 4, Dump Road, Essex, CT When- Oct 11, Oct 25, Nov 1 9am-1pm Includes- Paint stripper, turpentine, transmission fluid, unfinished aerosols, pesticides, herbicides, paints, insecticides, drain cleaners, brake fluids, batteries, cleaning solvents… Ammonia- a hazardous waste common in every household in cleaning solvents and some refrigerants. It can cause burns, blindness and lung complications so deserves proper disposal. For More Info (860) 388-3497
21
Works Cited “Ammonia.” John Matthey Catalysts. 2007. 2 Oct 2008. “Ammonia Production via a 2-Step Al2O3/AlN Thermochemical Cycle.” ETH. 2 Oct. 2008. Helmenstine, Anne Marie. “Ammonia.” 2008. 2 Oct. 2008. “Highlights of the New Anhydrous Ammonia Regulations.” Department of Agriculture. 2 Oct. 2008. “Household Hazardous Waste Facility.” 2008. CRERPA. 2 Oct. 2008. “The Nitrogen Cycle.” 16 Aug. 2006. Hach. 2 Oct. 2008. The Oscar Spot. 2007. 2 Oct. 2008. “Process Plants.” 1 Feb. 2003. Shiraz Petrochemical Complex. 2 Oct. 2008. R.M. Technologies. 2003. 2 Oct. 2008. “Selective Catalytic Reduction (SCR).” De-Nox Technologies. 2 Oct. 2008. USA Detergents. 2 Oct. 2008. “Waste Labels.” 2006. Imperial Irrigation District. 2 Oct. 2008. “What is Hazardous Waste?” Think Quest. 2 Oct. 2008.
Similar presentations
© 2024 SlidePlayer.com Inc.
All rights reserved.