Abstract
Like oil and natural gas, coal is a fossil resource and as such is not what first comes to mind when considering sustainable fuel sources. Coal contributes to sustainability as a complement to maintaining continuous availability of sufficient fuel to meet growing global demand[3].
This chapter was originally published as part of the Encyclopedia of Sustainability Science and Technology edited by Robert A. Meyers. DOI:10.1007/978-1-4419-0851-3
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Abbreviations
- Coal-to-liquids (CTL):
-
The conversion of coal to liquid fuels and/or chemicals
- Coprocessing (of coal):
-
The simultaneous conversion of coal and waste carbonaceous feedstocks such as petroleum-based residual oil or tar, plastics, or rubbers via once-through direct liquefaction into liquid, solid, and gaseous hydrocarbonaceous materials intended primarily for use as fuel.
- Direct coal liquefaction (DCL):
-
The conversion of coal to liquids via dissolution and/or hydroprocessing, without first gasifying the coal.
- DOE:
-
United States Department of Energy.
- Fischer–Tropsch reaction:
-
The catalytic conversion of synthesis gas to primarily hydrocarbons, the discovery being credited to Franz Fischer and Hans Tropsch.
- Gasification (of coal):
-
The conversion of coal to primarily synthesis gas plus ash at elevated temperature and pressure of oxygen and steam.
- Indirect coal liquefaction (ICL):
-
The conversion of coal to liquids via the intermediacy of synthesis gas.
- Light distillate:
-
A distillation cut of low molecular weight and low boiling range, obtained from refining of hydrocarbonaceous feedstocks, used to produce liquefied petroleum gas (LPG), gasoline, and naphtha.
- Middle distillate:
-
A distillation cut of mid-range boiling point, obtained from refining hydrocarbonaceous feedstocks, containing hydrocarbons ranging from C5 through about C20 or C22. When further distilled, the portion of middle distillates containing C5 through about C15 is often referred to as naphtha, and the portion containing C16 through up to C22 is referred to as diesel. The naphtha is often distilled further to produce gasoline and kerosene/jet fuel, or can be used as feed for a naphtha cracker unit to make light olefins. (Less commonly, the gasoline cut is initially collected along with the light distillates).
- Pyrolysis (of coal):
-
A mild gasification process wherein coal is heated in the absence of oxygen at sufficiently mildly elevated temperature as to produce a mixture of hydrocarbonaceous gases, liquids, and solids suitable for use as chemical precursors or fuel.
- Synthesis gas (syngas):
-
A mixture of primarily hydrogen and carbon monoxide produced by gasification or reforming of hydrocarbonaceous materials, used to synthesize fuels or chemicals.
- Water gas shift reaction:
-
The chemically reversible, catalyzed conversion of water and carbon monoxide to hydrogen and carbon dioxide.
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Asaro, M., Smith, R.M. (2013). Coal to Liquids Technologies. In: Malhotra, R. (eds) Fossil Energy. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-5722-0_11
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