Bio-Gaseous Fuels from Agricultural Waste Pyrolysis (Part I)

Abstract

The study, presented in two parts, puts in discussion the experimental results of low and high temperature pyrolysis on agricultural residues using a tubular batch reactor. During the experiment, nitrogen was used both as reaction environment and gas products carrier. The work focusses mainly on the pyrolysis gas analytical composition resulted from the process. The first part of the research is dedicated to the effect of process low temperature on rape straw pyrolysis. The experiments were conducted at 300°C, 400°C and 500°C to observe the solid – gas transformation at relative low temperatures. The main results revealed that, by balancing the amount of the nitrogen, the rape straw pyrolysis gas distribution varies by average between: 72%-77% CO2, 22%-24% CO, 1%-4% H2. The density of the gas in the devolatilization stage varies by average between 1.6-1.7 kg/m3, while its higher heating value ranges from 4 MJ/Nm3 - 8 MJ/Nm3.

Flammability Properties of the Pyrolysis Gas Generated from Willow Wood

“…The experiments were carried out in a fed-batch reactor under nitrogen atmosphere. The data referring to experimental pyrolysis methods applied to the current research study have already been detailed by Ionescu et al [32]. Therefore, here, only the obtained results concerning the gaseous phase (obtained following the process of the pyrolysis of willow wood at a temperature of 800 • C) will be presented and discussed.…”

The Effect of Pyrolysis Temperature on the Heat Value of Pyro-Oil Using Plastic Waste

“…Pyrolysis gases from agricultural waste were investigated at different temperatures. The result of the rape straw residues pyrolysis conversion demonstrated that high temperatures determine an important increase of H2 content in the gas phase, this strongly affecting the energy potential of the pyrolysis gas [13]. The physical properties of the liquid production from pyrolysis of waste plastic bag compared favorably with diesel oil, which shows that it can be used as diesel oil substitution [14].…”