Title:
Hydrothermal Conversion of Manure up to Near-Critical Conditions: A Thermodynamic Equilibrium Approach
Author(s):
Yakaboylu, O., Harinck, J., Smit Gerton, K.G., de Jong, W.
Document(s):
Paper
Abstract:
This study aims to investigate the behaviour of elements on compound and phase basis during the hydrothermal conversion of mixed pig-cow manure up to near critical temperatures and critical pressures. The software program FactSage 5.4.1 with a user-defined database has been used for thermodynamic equilibrium calculations. The temperature interval and the moisture content of the manure have been chosen as 120 °C - 360 °C and 80%, respectively. The results show that three phases are formed for this temperature interval: gas, liquid and solid. In addition to water vapor, CO2, CH4, N2 and H2 are the main gas products of the gas. The liquid phase is composed of an aqueous solution composed of stable ionic compounds such as HCO3 , K+, Na+ and Cl -and dissolved CH4 and N2. The solid phase compounds are mainly composed of C, Ca, Mg and P. The influence of moisture content and pressure on gas composition has also been investigated. The results show that working above 340 °C would result in good carbon gasification efficiency under equilibrium conditions as the solid carbon completely disappears.
Keywords:
modelling, thermochemical conversion, manure
Topic:
R&D on Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Gasification for power, CHP and polygeneration
Event:
20th European Biomass Conference and Exhibition
Session:
2BV.2.11
Pages:
1038 - 1043
ISBN:
978-88-89407-54-7
Paper DOI:
10.5071/20thEUBCE2012-2BV.2.11
Price:
FREE
