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.
Highlights
The effects of climate change are one of today’s highest environmental challenges
The experimental results revealed that the augmentation of the operating temperature increases the pyrolysis gas yields formation, due to the agricultural residues bond breaking
The influence of temperature on the low temperature pyrolysis rape straw residues is presented in the first part of the study
Summary
The greenhouse gas (GHG) emissions are the primary cause of warming effects that negatively impact the ecosystems. It is estimated that 25-28% of the GHG results from heat and electricity generation [1,2]. To overcome this adversity, over the last decades several efforts have been made by important key stakeholders in research, industry, business, and environmental policy. More ambition binding targets must be met until 2030: GHG emissions reduction of 40% compared to 1990s levels, a share of 27% of renewable energy sources in EU’s final energy consumption and a 27% increase in energy efficiency (compared to projections) [4]
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