Thermal Degradation Kinetics and Lifetime Prediction of Cellulose Biomass Cryogels Reinforced by its Pyrolysis Waste

Abstract

Degradation kinetics is an important tool in order to understand and improve energy conversion and the final application of a material. Cellulose cryogels (CC) are a new class of materials that can be reinforced by several types of particle, including biochar. Apart from it, degradation kinetics and lifetime prediction of biomass cellulose cryogels reinforced by cellulose pyrolysis waste (BC) has been investigated using TG techniques and iso-conversional model free methods. Additionally, the same study was applied to cellulose cryogels reinforced by graphene nanoplatelets (NPG) to compare the behavior of a filler from waste (BC) and a noble filler (NPG). Furthermore, the influence of the addition of the fillers into the cellulose biomass were evaluated in terms of thermal stability and crystallinity. BC and GNP led to higher values of activation energies ( a E ) calculated from modelfree isoconversional methods and all samples degraded in two-steps. Finally, lifetime prediction was successfully applied and the CC cryogel became more stable over time, maintaining almost 80% of the mass for 1 year exposed at 180 °C. The results of this study shown that only cellulose biomass cryogels are more suitable to produce thermal insulators due to it higher thermal stability.

Influence of the pressure on the interaction between stearic acid and Ar-O2 in inductively coupled radio frequency plasma

“…Some authors worked with oil removal from metal surfaces using plasma [5][6][7][8], and other authors [9,10] showed the importance of plasma cleaning in some industry fields, especially aeronautics. The study of the degradation kinetics of organic compounds has received attention given the complexity of reaction paths that can be followed and their influence on the characteristics of the degraded material, either for its use [11] or removal [7,[12][13][14]. The species in the plasma interact chemically and physically with the compounds on the surface [15,16], degrading them and forming volatile compounds that are removed from the vacuum system [10].…”

Kinetic and Mechanism of Cellulose Thermal Degradation

“…Using of cellulosic materials as fuel is the reason of importance of investigating its thermal degradation mechanism by researchers (e.g. Leroy et al, 2010;Burnham et al, 2015;Zheng et al, 2019;Lazzari et al, 2022). In addition, ame retardancy of cellulosic material for safety, res and release of harmful substances during res, waste incineration and recovery of chemical raw materials from cellulosic material refuses, optimization of incineration processes and reduction of energy production from fossil sources and its associated pollution, are the other valuable applications of these materials.…”