Thermogravimetric and kinetic analysis of energy crop Jerusalem artichoke using the distributed activation energy model

Abstract

Jerusalem artichoke has great potential as future feedstock for bioenergy production because of its high tuber yield (up to 90 t ha -1 ), appropriate biomass characteristics, low input demand, and positive environmental impact. The pyrolytic and kinetic characteristics of Jerusalem artichoke tubers were analyzed at heating rates of 5, 10, 20 and 30°C min -1 . TG and DTG curves in an inert (nitrogen) atmosphere suggested that there were three distinct stages of mass loss and the major loss occurs between about 190-380°C. Heating rate brought a lateral shift toward right in the temperature. And, it not only affects the temperature at which the highest mass loss rate reached, but also affect the maximum rate of mass loss. The distributed activation energy model (DAEM) was used to study the pyrolysis kinetics and provided reasonable fits to the experimental data. The activation energy (E) of tubers ranged from 146.40 to 232.45 kJ mol -1 , and the frequency factor (A) changed greatly corresponding to E values at different mass conversion.

Thermal characteristics and fate of heavy metals during thermal treatment of Sedum plumbizincicola, a zinc and cadmium hyperaccumulator

“…It was observed that the weight loss during combustion was even greater than that during pyrolysis in the third step, which indicates that oxidation of inorganic ingredients of the sample might occur during combustion. The TG curve of combustion of S. plumbizincicola was similar to that of other energy crops, wood or municipal solid wastes [18][19][20][21] and appropriate biomass characteristics, low input demand and positive environmental impact. S. plumbizincicola is thus a potential renewable energy source and a substitute for the declining supply of fossil fuel resources.…”

Thermogravimetric and kinetic analysis of Spirulina wastes under nitrogen and air atmospheres

“…3A), which was similar with the pyrolysis of several biomass, such as Phragmites australis (Zhao et al, 2012), Dunaliella tertiolecta (Zou et al, 2010) and Jerusalem artichoke tuber (Li et al, 2013). Li et al (2013) has given a clear explanation about the whole pyrolysis stages. TG and DTG curves under oxygen atmosphere suggested that there were four distinct stages of mass loss (Fig.…”

Pyrolysis of Sedum plumbizincicola, a zinc and cadmium hyperaccumulator: pyrolysis kinetics, heavy metal behaviour and bio-oil production

“…In the present study, thermal conversion process of S. plumbizicicola under an inert atmosphere is composed of a set of irreversible single (first-order) reactions occurring successively (Cheng et al 2015;Li et al 2013). The model is expressed as follows (Miura 1995…”