A Kinetic Study on Combustible Coastal Debris Pyrolysis via Thermogravimetric Analysis

Abstract

Coastal debris has recently emerged as a serious environmental pollution problem. Coastal debris can be treated using pyrolysis because it consists mainly of combustible materials like plastics (e.g., polyethylene (PE), polypropylene (PP), nylon) and wood. In this study, the pyrolysis characteristics of coastal debris were fully utilized by applying their basic data to fuel production. The initial temperature increased from 330 °C to 380 °C for the nylon fishing net coastal debris sample, from 405.01 °C to 430.08 °C for the PE fishing net coastal debris sample, from 395.01 °C to 419.96 °C for the PP rope coastal debris sample, and from 114.95 °C to 115.02 °C for the wood (bamboo) coastal debris sample. The activation rate of the global activation energy and the pre-exponential factors rose with the increasing heating rate, complementing the reduction rate constant due to the larger growth of the exponential term due to the kinetic models used.

Parametrization of a Modified Friedman Kinetic Method to Assess Vine Wood Pyrolysis Using Thermogravimetric Analysis

“…In this case, the activation energy was obtained by taking the logarithm of Equation (12) and rearranging the resultant mathematical expression. Thus, E values are associated with Equation (13).…”

“…To implement calculations and as a result of the observed lag in the decomposition of cellulose and lignin, Equations (12) and (13) were used with different α values for both NL-B and L-B samples for zones in which a single pseudo-component was decomposing. The resulting activation energy values are presented in Figure 6, which shows a lag in the conversion degree of 0.05 in L-B with respect to NL-B.…”

“…Thermogravimetric analysis (TGA) has become a widely recognized technique by which biomass pyrolysis can be studied. This approach entails measuring the biomass weight over time at different heating ramps [7,12,13]. Once the data are obtained, biomass pyrolysis is studied by calculating common kinetic parameters.…”

“…Common E with the Friedman method with a delay of α = 0.05 in both samples by using Equation(13).If E values are associated with α ranges, the following results apply: moisture release at 0.03 ≤ α≤ 0.08 (NL-B) and (0.03 + ∆α) ≤ α ≤ (0.08 + ∆α) (L-B); cellulose pyrolysis at 0.73 ≤ α ≤ 0.8 (NL-B) and (0.73 + ∆α) ≤ α ≤ (0.8 + ∆α) (L-B); and lignin decomposition at 0.82 ≤ α ≤ 0.89 (NL-B) and (0.82 + ∆α) ≤ α ≤ (0.89 + ∆α) (L-B).…”

Physical and Chemical Properties of Waste from PET Bottles Washing as A Component of Solid Fuels

“…The peak temperatures are widely used as a measure of reactivity [33]. Song et al [34] obtained a similar temperature distribution range from 330 • C to 535 • C in thermogravimetric studies for plastic coastal debris. The third peak on the DTG curve with a maximum of 602 • C is associated with thermal decomposition reactions of Ca(OH) 2 , which take place at temperatures of 480-620 • C [35].…”