Biomass Gasification Overview Lecture 36

Flashcards created for review on Biomass Gasification, covering types of gasifiers, their processes, advantages, and key outputs.

What is the primary output of biomass gasification?

Syngas, which consists primarily of CO and H2.

What type of gasifier has high thermal efficiency and tolerates high moisture content?

Updraft gasifier.

In an updraft gasifier, which zone experiences drying?

The drying zone is between 100-200°C.

What is a major disadvantage of an updraft gasifier?

It produces low-quality syngas with high tar content.

Which gasifier design minimizes tar cleanup by converting tarry products into gas?

Downdraft gasifier.

What are the benefits of using a bubbling fluidized bed gasifier?

High throughput, good mixing, and high carbon conversion rates.

What is a significant limitation of downdraft gasifiers?

They require the solid fuel to be pelletized or briquetted.

What is a key characteristic of crossdraft gasifiers?

They are ideal for charcoal but have poor syngas quality.

What is the composition of conditioned syngas produced in gasification?

Typically includes CO, CO2, CH4, H2, and N2 in varying percentages.