Release of P from Pyrolysis, Combustion, and Gasification of Biomass—A Model Compound Study

Phosphorus-rich biomass can cause operational problems in combustion units. Na-phytate, a model compound used to simulate phosphorus biomass, was studied laboratory-scale reactor under temperature and gas atmosphere conditions relevant for pyrolysis, combustion, gasification fixed bed or fluidized reactors understand the P Na release behavior. Solid residues from Na-phytate thermal conversion were analyzed using ICP with optical emission spectrometry order quantify release. The mechanism evaluated based on FTIR spectroscopy analysis of residues, measurement flue CO/CO2 concentration, characterization particles SEM EDS, thermodynamic equilibrium calculations. decomposed several steps nitrogen atmosphere, starting condensation phosphate OH groups, followed by carbonization range 300–420 °C. In process, units detached carbon structure formed cyclic NaPO3. Above 800 °C, C char reacted melted NaPO3 form CO gaseous elemental P. When produced flash pyrolysis at °C 10 min exposed 1% O2, 10% CO2, H2O (in N2), phase 800–1000 around 0–7%. However, an inert holding time 2 h until full had been achieved, increased 4% almost 30% 1000 results indicated that carbothermic reduction reaction is responsible vaporization not dominating temperatures below A small amount released containing gases because these species consumed thereby inhibited