Pyrolysis and gasification of macroalgae Enteromorpha prolifera under a CO₂ atmosphere using the thermogravimetry–Fourier transform infrared spectroscopy technique

Abstract

Non-isothermal pyrolysis and gasification of Enteromorpha prolifera (also known as Ulva prolifera) under a CO2 atmosphere were investigated by thermogravimetry analysis. The gaseous products were measured online with Fourier transform infrared spectroscopy coupled with thermogravimetry. The kinetic parameters of pyrolysis and gasification reactions were obtained using the Coats–Redfern method. The experimental results showed that Enteromorpha prolifera had two derivative thermogravimetry peaks centered at 240 and 800°C, indicating the pyrolysis of organics and gasification of char, respectively. Carboxylic acids, ethers, and alcohols were the dominating condensable products generated from pyrolysis between 230 and 300°C. H2O, CH4, and aliphatic hydrocarbons were also formed in this temperature range, and they were also continuously released at higher temperatures, indicating further polymerization of the freshly generated pyrolytic char. CO was mainly produced between 700 and 900°C, and its yield was much higher than that of the pyrolytic gaseous products. The Ginstling equation (the D4 model) proved to be the most probable mechanism function for both the pyrolysis and gasification stages, with activation energies of 138.30 and 93.43 kJ mol−1, respectively.

Research on the Damping Performance of Mining Highly Efficient Water-Retaining Colloidal Material Against the Spontaneous Combustion of Coal

“…In the non isothermal experimental process in thermal equilibrium, the mass of the sample is regarded as a function of temperature. According to Arrhenius formula [36] and law of mass action, the decomposition rate of the sample can be expressed as:…”

Facile preparation of magnetic porous carbon monolith from waste corrugated cardboard box for solar steam generation and adsorption

“…Kinetic study is important for the design of large-scale reactors to achieve practical production. Coats-Redfern method was used in this study to determine the kinetic parameters of Fe-WCCB and H 2 O-WCCB [26].…”