Abstract
Alkali metals have detrimental effects on fast pyrolysis
process for bio crude. In this thesis, a new process for
the removal of these alkalis was designed. In this way,
the yield, quality and profitability of pyrolysis process
could be enhanced.
The design of the unit included testing the wash process
in laboratory and pilot scale, choosing the suitable
equipment, drawing the flow chart including the control
instruments, writing the operating instructions,
calculating the mass balances, defining the technical
values for the equipment. The economic potential of the
unit was studied by searching the current prices for the
equipment, calculating the fixed capital investment and
the operating costs based on the balances and power
consumption of equipment and comparing these to the grown
sale incomes. Sensitivity analysis was performed for the
fixed capital investment and the prices of chemicals:
nitric acid and sodium hydroxide.
In this Thesis, a process including the following phases
was designed: The forest residue biomass is crushed into
a finer particle size (to
| Original language | English |
|---|---|
| Qualification | Master Degree |
| Awarding Institution |
|
| Place of Publication | Espoo |
| Publisher | |
| Publication status | Published - 2016 |
| MoE publication type | G2 Master's thesis, polytechnic Master's thesis |
Keywords
- process design
- biomass alkali removal
- washing process
- fast pyrolysis
- bio-oil
- rotary vacuum drum washer
- reverse osmosis
- mass balance
- sizing
- cost evaluate
- sensitivity analysis
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Cite this
Renkonen, S. (2016). Removal of alkali metals for the enhancement of fast pyrolysis process: Master's thesis. Aalto University. http://urn.fi/URN:NBN:fi:aalto-201610124920