Which gasifier has a minimum tar converting capability?(a) Counter current gasifier(b) Cross draught gasifier(c) Co-current gasifier(d) Fluidized bed gasifierThis question was addressed to me in an interview for job.The query is from Applications of Biogas & Gasifier topic in chapter Biomass Energy of Energy Engineering

Which gasifier has a minimum tar converting capability?(a) Counter cur

1.	Which gasifier has a minimum tar converting capability?(a) Counter current gasifier(b) Cross draught gasifier(c) Co-current gasifier(d) Fluidized bed gasifierThis question was addressed to me in an interview for job.The query is from Applications of Biogas & Gasifier topic in chapter Biomass Energy of Energy Engineering
Answer» Correct choice is (b) CROSS draught gasifier The best I can explain: A disadvantage of cross draught gasifiers is their minimal TAR converting capacity and the consequent needs for the high quality charcoal. It is because of the UNCERTAINTY of charcoal quality that a number of charcoal gasifiers EMPLOY down draught principle, in order to maintain at least a minimal tar CRACKING capability.

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