Upgrading of Diammonium Hydrogen Phosphate on Wood and High-Value as an Efficient Derived Carbon

The coupling of DAP (2.9-29 wt%) and pre-carbonization (300 ?, 1 h) of a woody biomass waste (fast growing) was aimed to improve the carbon yield for pyrolysis technology. After the pretreatment, the pyrolysis experiment was performed at 500-900 ? under hypoxic conditions. The introduction of DAP (2.9%) could enhance the solid yields 2 times for biomass, and the calorific value was elevated from 22.57 kJ/kg for the carbonized biomass to 24.67 kJ/kg in carbonization. The further pyrolysis results showed that the comparable solid yield (85%), gas yield (4.1%), and liquid yield (21%) of CPDP were obtained by the above modification of biomass. The phenolic and toluene compounds of the tar were reduced by 37.3% and 7%, the temperature of the main gas precipitation peaks was decreased by 78 ?, and the released of methane was more than 3 times. This work for the first time proves the effectiveness of improving the carbon fixation and deoxidation performance from biomass via the pretreatment by DAP impregnation and the carbonization.

Automated summary

The coupling of DAP and pre-carbonization was conducted to improve the carbon yield for pyrolysis of woody biomass waste. The introduction of DAP enhanced solid yields and calorific value. The modified biomass showed comparable yields and reduced phenolic and toluene compounds in the tar.