Producer gas containing least amount of tar is produced by the_________________?
Correct answer: B. Partial combustion of large size (< 50 mm) coke
- A. Partial combustion of coal
- B. Partial combustion of large size (< 50 mm) coke
- C. High pressure gasification of coal (e.g. in Lurgi gasifier)
- D. Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier)
Explanation
Gasifying large coke produces very little tar because coke contains little volatile matter, the main source of tar. Coal gasification, especially under pressure, can yield appreciable tar and other condensable hydrocarbons.
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