for part a) can someone show how we get from 35265405 moles to 564.24tonne/year 2. [landfills, reduction of GWP emissions] A paper mill landfills 50 metric tonnes per day of solid wastecomposed primarily of sludge/solids from wastewater treatment plant, ash, and other miscellaneous wastetypical of a kraft mill. The mill generates solid waste for 350 days a year. The landfill has been in use for20 years and remains active. The decay of the solid waste in the landfill produces a biogas rich in methane.The amount of methane generated can be estimated by using the simplified first order decay equationgiven in the supplementary information.a) The landfill does not have a collection and recovery system for the biogas and the methane is releasedto the atmosphere. Calculate the amount of greenhouse gases emitted to the atmosphere due to themethane release from the landfill. Use the most recent GWP value for methane (IPCC AR5 value) inyour calculations and answer in tonnes of CO2 equivalents per year, t CO₂e/y.[Ans: = 15,780 t CO₂e/y]b) Consider that the landfill is fitted with a "collection + combustion" system to harness the calorific valueof the generated methane and reduce CH4 emissions. The system has a collection efficiency of 75%and 10% of the uncollected meth is oxidised before escaping to the atmosphere. collectedmethane is burned.i. Calculate the amount of greenhouse gases emitted solely due to the methane that still escapesfrom the landfill.[Ans: = 3,550 t CO2e/y]ii. Assuming perfect combustion of the collected methane, calculate the percentage net reduction ingreenhouse gas emissions that is attained by fitting the "collection + combustion" system.[Ans: = 70% net reduction in GHG emissions]Supplementary information:• Assume that the methane is generated and collected or released/emitted always at 0°℃ and 1atm.• CH₁ generated from waste in landfill (m³/year) = R L₁ (e-kC – e-kT)with: R = average amount of waste sent to landfill per year (t/y)Lo = ultimate methane generation potential = 100 m³ of CH4/t of wastek = methane generation rate constant = 0.03 y¹C = time since landfill stopped receiving waste (y)T = time since landfill opened (y)R = 8.31446 J K-¹ mol1¹ = 0.082057 L atm K-1 mol¹; 1 atm = 101325 Pa. сниper year (m³/year) - RL. (eke e-kr)C = 0T= 20 years17500R= 50x35017500 X100 (1-0-5488)idedgas equationماLa = 100-789579.63 m ²³ / year0.5488) = 789579-63PV = nRT101325 x 789579.68 = nx8.31x273n = 35265405 moles.564.24 T/yearGWP value of methane over 20 years = 28Tonne esuivalent of co= 28x 564-24 = 15780-15798.72

Using the molar mass, molar mass:Methane has a molar mass .Using the molar mass, convert to convert…

2. [landfills, reduction of GWP emissions] A paper mill landfills 50 metric tonnes per day of solid waste composed primarily of sludge/solids from wastewater treatment plant, ash, and other miscellaneous waste typical of a kraft mill. The mill generates solid waste for 350 days a year. The landfill has been in use for 20 years and remains active. The decay of the solid waste in the landfill produces a biogas rich in methane. The amount of methane generated can be estimated by using the simplified first order decay equation given in the supplementary information. a) The landfill does not have a collection and recovery system for the biogas and the methane is released to the atmosphere. Calculate the amount of greenhouse gases emitted to the atmosphere due to the methane release from the landfill. Use the most recent GWP value for methane (IPCC AR5 value) in your calculations and answer in tonnes of CO2 equivalents per year, t CO₂e/y. [Ans: = 15,780 t CO₂e/y]

2. [landfills, reduction of GWP emissions] A paper mill landfills 50 metric tonnes per day of solid waste composed primarily of sludge/solids from wastewater treatment plant, ash, and other miscellaneous waste typical of a kraft mill. The mill generates solid waste for 350 days a year. The landfill has been in use for 20 years and remains active. The decay of the solid waste in the landfill produces a biogas rich in methane. The amount of methane generated can be estimated by using the simplified first order decay equation given in the supplementary information. a) The landfill does not have a collection and recovery system for the biogas and the methane is released to the atmosphere. Calculate the amount of greenhouse gases emitted to the atmosphere due to the methane release from the landfill. Use the most recent GWP value for methane (IPCC AR5 value) in your calculations and answer in tonnes of CO2 equivalents per year, t CO₂e/y. [Ans: = 15,780 t CO₂e/y]

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter4: Energy And Chemical Reactions

Section: Chapter Questions

Problem 123QRT

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