what does green mean?

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What does Green Mean?. “In every deliberation, we must consider the impact on the seventh generation” – The Constitution of the Iroquois Nations, ca 1100. Sustainability. “To meet the needs of the present without compromising the ability of future generations to meet their own needs.” - PowerPoint PPT Presentation

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What does Going Green Mean?

SustainabilityTo meet the needs of the present without compromising the ability of future generations to meet their own needs. Brundtland Commission, United Nations, 1987

In every deliberation, we must consider the impact on the seventh generation The Constitution of the Iroquois Nations, ca 1100

Humankind has begun to play dice with the planet, without knowing all the rules of the game. McNeil

2

The era of procrastination, of half-measures, of soothing and baffling expedients, of delays is coming to its close. In its place we re entering a period of consequences. Winston Churchill

Why Is Sustainability Important?Humankind has begun to play dice with the planet, without knowing all the rules of the game. McNeil

3Disposable Society140 million cell phones disposed in US in 2007, 10% recycled

5.1 billion lbs PET bottles/jars used by US in 2009, 28% recycledBatteriesComputers4Chemical Exposure & Environmental ContaminationChapter 3How are chemicals released into the environment?What are the impacts on the environment?The list of potentially hazardous compounds is large BUT many organic compounds are not harmfulVolatility (inhalation)Solubility (particularly water)Volatile Organic Compounds (VOCs)Solvents, plasticizers, cleaners, air deodorants, paints, smoking, drivingEmissionsAir, water, and soil pollution

UNLESS someone like you cares a whole awful lot, nothing is going to get better. Its not. The Lorax

Humankind has begun to play dice with the planet, without knowing all the rules of the game. J.R. McNeil

So, what can we do?Humankind has begun to play dice with the planet, without knowing all the rules of the game. McNeil

6Coffee Decaffeination

Sustainable Innovation is a stepwise process

7DetergentsSustainable Innovation is a stepwise process

8Fuel & GrassSustainable Innovation require thinking outside the box

9Millau Bridge in FranceSustainable Innovation requires merging technology & nature

10Understand & Be Aware of Environmental Contamination & Chemical ExposureTraditional vs Green ApproachesSustainability is a way of thinkingWe need to change the culture/mindsetWe must educate society in order to stimulate changeMeasuring Greenness? Creating a Sustainable CultureSystems Thinking

Insanity is doing the same thing over and over again and expecting different results. Albert Einstein

Sustainability is a mindsetProduct vs Production12The Role of Green ChemistryGreen Chemistry is a tool for a Sustainable FutureIncorporation of sustainable thinking in experimental designWe must educate students about GC in a way that encourages application of their knowledge

13Introduction to Green ChemistryChapter 5How do we deal with Chemical Exposure?Traditional ApproachesMinimize risk by limiting exposure & reducing quantities usedscrubbersTreatment of waste waterIncinerationChemical treatmentWaste minimizationGreen Chemistry StrategiesMinimize risk by striving to eliminate or reduce use & generation of hazardous substancesRisk = f(exposure, hazard)

12 Principles of Green Chemistry and EngineeringWaste PreventionAtom EconomyLess Hazardous Chemical SynthesisDesigning Safer Products Safer Solvents and AuxiliariesDesign for Energy EfficiencyUse of Renewable FeedstocksReduce DerivativesCatalysisDesign for DegradationReal-time Analysis for Pollution PreventionAccident PreventionPrevention Instead of TreatmentInherent Rather Than CircumstantialDesign for SeparationMaximize EfficiencyOutput-Pulled Versus Input-PushedConserve ComplexityDurability Rather Than ImmortalityMeet Need, Minimize ExcessMinimize Material DiversityIntegrate Material and Energy FlowsDesign for Commercial AfterlifeRenewable Rather Than Depleting

The Role of this ClassGreen Chemistry Experience VS Green Chemistry Labs Incorporated labs to teach techniques and green chemistrySolventless AldolAcid/Base ExtractionBiosynthesis of EthanolFriedel-Crafts AcetylationIsolation of Spearmint Oil Components3-step green synthesis where YOU apply previous knowledgeAnalyze greenness of current experimentsPercent Yield, Atom Economy, Atom Efficiency, Effective Mass Yield, E-FactorSuggest revisions to experimentsGreen Chemistry MetricsPercent (Chemical) Yield

Atom Economy

How much of the reactants remain in the final productDoes not account for solvents, reagents, reaction yield, and reactant molar excessAtom Efficiency

Green Chemistry Metrics (cont)Effective Mass Yield

What is benign? Who decides?Ignores stoichiometry

E-Factor

Typically split into 2 sub-categories: organic & aqueous wasteSmaller is better