{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "\n", "*This notebook contains course material from [CBE20255](https://jckantor.github.io/CBE20255)\n", "by Jeffrey Kantor (jeff at nd.edu); the content is available [on Github](https://github.com/jckantor/CBE20255.git).\n", "The text is released under the [CC-BY-NC-ND-4.0 license](https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode),\n", "and code is released under the [MIT license](https://opensource.org/licenses/MIT).*" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "\n", "< [Process Flows and Balances](http://nbviewer.jupyter.org/github/jckantor/CBE20255/blob/master/notebooks/03.00-Process-Flows-and-Balances.ipynb) | [Contents](toc.ipynb) | [CO2 Production by Automobiles](http://nbviewer.jupyter.org/github/jckantor/CBE20255/blob/master/notebooks/03.02-CO2-Production-by-Automobiles.ipynb) >
"
]
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{
"cell_type": "markdown",
"metadata": {
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"id": "m5jzNcaMcDIL"
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"source": [
"# Global CO2 Budget"
]
},
{
"cell_type": "markdown",
"metadata": {
"colab_type": "text",
"id": "m5jzNcaMcDIL"
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"source": [
"## Summary\n",
"\n",
"This [Jupyter notebook](http://jupyter.org/notebook.html) provides an analysis of global CO2 emissions go by solving a mass balance."
]
},
{
"cell_type": "markdown",
"metadata": {
"colab_type": "text",
"id": "t4lKF0WBcDIP"
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"source": [
"## Problem Statement\n",
"\n",
"The total global emissons of CO2 is estimated by the [Netherlands Environmental Assessment Agency](http://www.pbl.nl/en/publications/trends-in-global-co2-emissions-2013-report) to be 34.5 billion metric tons from all sources, including fossil fuels, cement production, and land use changes. [As measured by NOAA](http://www.esrl.noaa.gov/gmd/ccgg/trends/global.html), in recent years the atmospheric concentration of CO2 is increasing at an annual rate of about 2.4 ppmv (parts per million by volume).\n",
"\n",
"\n",
"\n",
"Assuming these numbers are accurate and that the atmosphere is well mixed, what fraction of global CO2 emissions are being retained in the atmosphere?"
]
},
{
"cell_type": "markdown",
"metadata": {
"colab_type": "text",
"id": "ivgLNbWFcDIR"
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"source": [
"## Solution\n",
"\n",
"This problem requires us to perform a material balance for CO2 in the atmosphere. We'll perform the using a 10 step approach outlined in the textbook."
]
},
{
"cell_type": "markdown",
"metadata": {
"colab_type": "text",
"id": "ivgLNbWFcDIR"
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"source": [
"### Step 1. Draw a diagram.\n",
"\n",
""
]
},
{
"cell_type": "markdown",
"metadata": {
"colab_type": "text",
"id": "ivgLNbWFcDIR"
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"source": [
"### Step 2. Define the system of interest.\n",
"\n",
"The system of interest is the global atmosphere which we assume is well mixed and of uniform composition."
]
},
{
"cell_type": "markdown",
"metadata": {
"colab_type": "text",
"id": "ivgLNbWFcDIR"
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"source": [
"### Step 3. Choose components and define stream variables.\n",
"\n",
"The chemical component to model is CO2. The stream variables are the mass flowrates of CO "
]
}
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