3 Technologies For Waste Tire Disposal = Turn them into simpler organic compounds
The magic of gasification, liquification or pyrolysis can convert waste tires that are filling our landfills into its useful simpler organic compounds. Let's explore these conversions since many people don't understand how all of this works. The information provided here is from the Environmental Factors of Waste Tire Pyrolysis, Gasification, and Liquefaction Final Report presented to the California Integrated Waste Management Board in July 1995 by CalRecovery.
Pyrolysis involves heating organic materials without oxygen to break them down to simpler organic compounds. When organic wastes (e.g., waste tires) are the feedstock, products of the process include char or carbon char, oil, and gas. For example, pyrolysis can convert wood to charcoal and a low-Btu gas.
Gasification of organics occurs at operating conditions between the complete absence of oxygen and stoichiometric (i.e., sufficient oxygen to complete the oxidation reaction). Gasification involves drying and pyrolyzing a feedstock, and oxidizing the solid char to heat the reaction and provide carbon monoxide (CO) to the gas. In the early 1980s, the waste industry saw gasification as promising. Gasification processes maximized the effect of carbon-hydrogen ratios. Furthermore, the product gas was suitable for use in existing boilers.
Liquefaction is the thermochemical conversion of an organic solid into a petroleum-like liquid. Liquefaction typically involves the production of a liquid composed of heavy molecular compounds from a pyrolytic gas stream. The liquid has properties similar, but not identical, to those of petroleum-based fuels. Essentially, liquefaction is manipulation of the pyrolysis process in order to produce a liquid with characteristics similar to petroleum-based liquids (e.g., fuel oils).
The typical composition of shredded domestic tires were found by the same study to be 82% carbon, 8% hydrogen, 2% sulfur, 7% Fe, and 1% other.
Pyrolysis involves heating organic materials without oxygen to break them down to simpler organic compounds. When organic wastes (e.g., waste tires) are the feedstock, products of the process include char or carbon char, oil, and gas. For example, pyrolysis can convert wood to charcoal and a low-Btu gas.
Gasification of organics occurs at operating conditions between the complete absence of oxygen and stoichiometric (i.e., sufficient oxygen to complete the oxidation reaction). Gasification involves drying and pyrolyzing a feedstock, and oxidizing the solid char to heat the reaction and provide carbon monoxide (CO) to the gas. In the early 1980s, the waste industry saw gasification as promising. Gasification processes maximized the effect of carbon-hydrogen ratios. Furthermore, the product gas was suitable for use in existing boilers.
Liquefaction is the thermochemical conversion of an organic solid into a petroleum-like liquid. Liquefaction typically involves the production of a liquid composed of heavy molecular compounds from a pyrolytic gas stream. The liquid has properties similar, but not identical, to those of petroleum-based fuels. Essentially, liquefaction is manipulation of the pyrolysis process in order to produce a liquid with characteristics similar to petroleum-based liquids (e.g., fuel oils).
The typical composition of shredded domestic tires were found by the same study to be 82% carbon, 8% hydrogen, 2% sulfur, 7% Fe, and 1% other.
Tags: alternative, fossil, fuel, fuels, gasification, landfill, liquefaction, organic, petroleum, pyrolysis
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