EVSC 1080 Study Guide - Midterm Guide: Gas Natural, Asphalt, Energy Returned On Energy Invested
21 May 2016
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Releases greenhouse gases (mainly co2) into the atmosphere. Low net energy yield making them not cost effective. Releases co2 & other air pollutants when produced and burned. High water use and severe land disruption. Oil sand contains bitumen: oil that is too heavy or thick to flow or be pumped without being diluted or heated. Natural gas (mixture of gasses 50-59 percent methane- ch4) Liquid natural gas has low net energy yield. Production and delivery emits more co2 and ch4 per unit of energy than coal. Fracking uses and pollutes a lot of water. Hydraulic fracturing = chemically treated water and sand under high pressure used to fracture rocks (stimulates production and increases permeability of the rocks) Shale gas- natural gas that is trapped within shale formations. Shales are fine-grained sedimentary rocks that can be rich resources of petroleum and natural gas.
