PHYSICAL PRETREATMENT OF BIOMASS - Biomass as a Sustainable Energy Source for the Future - page 262

SHORT-ANSWER QUESTIONS

8.1 What techniques are available for harvesting switchgrass?
8.2 Survey the literature concerningwhich part of the strawis (tobe) left on the fields.

8.3 Why would debarking be advantageous when the wood will be burned for
energy recovery?

8.4 Mention the pros and cons of indoor storage of grass in a barn.

8.5 Give an example of smart blending in a biomass-to-energy supply chain; which
purpose(s) can it serve?
8.6 Why does a higher original moisture content of biomass cause higher losses of
dry matter?

8.7 What is accomplished by biomass washing? For which types of biomass do
you think this is relevant? List advantages and disadvantages of washing as
a pretreatment technique.

8.8 Which particle properties change when size reduction is applied?

8.9 List advantages and disadvantages of direct comilling of biomass with coal.
Is this always possible?
8.10 Which size reduction equipment would you select to mill sugarcane to enable
pulverized fuel combustion?
8.11 How can particle size distributions be determined? Which average particle
sizes can you name? Why are they needed?

8.12 In practice, is screening always needed for biomass processing?

8.13 Miao et al. (2011) show a correlation between the bulk density of biomass and
the screen size as a power law expression. Why is the correlation characterized
by a negative sign in the power of the characteristic size?
8.14 What are compaction techniques for straw? Is size reduction needed for the
devices involved?

8.15 What are advantages and disadvantages of compacting biomass?

8.16 What are limits in the application of mechanical dewatering of biomass?

8.17 List advantages and disadvantages of direct and indirect drying techniques.

8.18 Describe the pros and cons of direct drying using flue gas and steam.

8.19 Is microwave heating an economically viable option for large-scale drying of
biomass for heating purposes?
8.20 Which factors cause emissions of VOCs to increase when using direct drying
techniques?