The effect of mineral matter on the physical and chemical activation of low rank coal and biomass materials

Vamvuka, Despina; Troulinos, S.; Kastanaki, Eleni

doi:10.1016/j.fuel.2006.03.005

Cited by 129 publications

(61 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1), demonstrating a low efficiency in fats removal and protein mineralization in the system. Although increments in the mineral content of digestates are known to redound in an increase of the burn out temperature of the samples (Rubiera et al 2002;Vamvuka et al 2006), in the present study samples with higher mineral content showed lower burn out temperatures (SHW-50 and SHW-36), which may be probably due to the higher content of lipids and N-compounds of digestates with the reduction in the HRT.…”

Section: Thermogravimetric Analysiscontrasting

confidence: 60%

Anaerobic digestion of solid slaughterhouse waste: study of biological stabilization by Fourier Transform infrared spectroscopy and thermogravimetry combined with mass spectrometry

et al. 2009

View full text Add to dashboard Cite

In this paper, Fourier Transform infrared spectroscopy (FTIR) along with thermogravimetric analysis together with mass spectrometry (TG-MS analysis) were employed to study the organic matter transformation attained under anaerobic digestion of slaughterhouse waste and to establish the stability of the digestates obtained when compared with fresh wastes. Digestate samples studied were obtained from successful digestion and failed systems treating slaughterhouse waste and the organic fraction of municipal solid wastes. The FTIR spectra and TG profiles from well stabilized products (from successful digestion systems) showed an increase in the aromaticity degree and the reduction of volatile content and aliphatic structures as stabilization proceeded. On the other hand, the FTIR spectra of non-stable reactors showed a high aliphaticity degree and fat content. When comparing differential thermogravimetry (DTG) profiles of the feed and digestate samples obtained from all successful anaerobic systems, a reduction in the intensity of the low-temperature range (approximately 300 degrees C) peak was observed, while the weight loss experienced at high-temperature (450-550 degrees C) was variable for the different systems. Compared to the original waste, the intensity of the weight loss peak in the high-temperature range decreased in the reactors with higher hydraulic retention time (HRT) whereas its intensity increased and the peak was displaced to higher temperatures for the digesters with lower HRT.

show abstract

Section: Thermogravimetric Analysiscontrasting

confidence: 60%

Anaerobic digestion of solid slaughterhouse waste: study of biological stabilization by Fourier Transform infrared spectroscopy and thermogravimetry combined with mass spectrometry

et al. 2009

View full text Add to dashboard Cite

show abstract

“…The content and composition of ashes presented in the organic matter are known to delay the combustion process. Rubiera et al (2002) and Vamvuka et al (2006) reported that demineralized samples presented lower burn-out temperatures than those of their parent fuels. In the thermal analysis of concentrated olive mill wastewater, with a high mineral content, an increase in the burn-out temperature was reported by Miranda et al (2008).…”

Section: Thermal Analysismentioning

confidence: 99%

Digestion of cattle manure under mesophilic and thermophilic conditions: characterization of organic matter applying thermal analysis and 1H NMR

et al. 2010

View full text Add to dashboard Cite

Digestion of cattle manure collected from a livestock farm together with bedding material (straw) has been studied under mesophilic and thermophilic conditions in batch reactors. The digestion was carried out for a prolonged period with the aim of evaluating the changes undergone by the organic matter. The mesophilic digestion carried out revealed a greater capacity to produce gas and transform organic matter, while a higher conversion rate, but a lower gas yield, was obtained under thermophilic conditions. Degradation of the organic matter was evaluated by means of thermal analysis and (1)H NMR. Stabilisation through anaerobic digestion (either mesophilic or thermophilic) resulted in an increase in the quality of the organic matter, as characterised by an enrichment in thermostable compounds, and an accumulation of long chain aliphatic materials. The experiments performed demonstrated the transformation of organic matter into complex materials under anaerobic conditions with an accumulation of aliphatic components under both types of conditions tested. Degradation through mesophilic digestion, in comparison to the thermophilic process, resulted in a greater destruction of straw particles.

show abstract

“…(d) The fourth stage was above 780 ∘ C, and the total weight loss was accounting for about 6.25%. As shown in Table 2, this was mainly due to the following: the partly decomposition of mineral salts such as combinations of SiO 2 and other oxides (mostly metal oxide) [20] and then SiO 2 and C reacted to produce SiC and CO at high temperature. As for at the heating rate of 20 ∘ C/min, three stages were considered.…”

Section: Tga Analysis and Kinetic Parameter Frommentioning

confidence: 99%

Pyrolysis Characteristics and Kinetic Analysis of Sediment from the Dianchi Lake in China

Luo

2018

International Journal of Chemical Engineering

View full text Add to dashboard Cite

Pyrolysis properties and kinetic analysis of lake sediment, as well as evolution characteristics of the gaseous products at 5 ∘ C/min, 10 ∘ C/min, and 20 ∘ C/min, were investigated by TG-FTIR. Comparison to the TG and DTG curves at different heating rates, the pyrolysis process at 10 ∘ C/min could describe the sediment pyrolysis characteristics better than at 5 ∘ C/min and 20 ∘ C/min; thus the process of sediment pyrolysis could be considered as four stages. From the kinetics analysis, the nth-order chemical reaction model was suitable to describe the sediment pyrolysis reaction well. The values of n were within 2.55-3.42 and activation energy was ranged from 15.83 KJ/mol to 57.92 KJ/mol at different heating rates. The gaseous products of H 2 O, CO 2 , CO, CH 4 , and SO 2 and several functional groups (C-H, C=O, and C-O) could be found from the IR spectrum. From the evolution characteristics with the temperature, there were two evolution peaks for CO 2 and one peak for CH 4 and SO 2 . However, the evolution of CO always increased. Besides, the evolution peak for CO 2 , CH 4 , and SO 2 all shifted to the low temperature region with the decrease of heating rate. The results could provide theoretical basis for harmless treatment and resource utilization of lake sediment.

show abstract

The effect of mineral matter on the physical and chemical activation of low rank coal and biomass materials

Cited by 129 publications

References 24 publications

Anaerobic digestion of solid slaughterhouse waste: study of biological stabilization by Fourier Transform infrared spectroscopy and thermogravimetry combined with mass spectrometry

Anaerobic digestion of solid slaughterhouse waste: study of biological stabilization by Fourier Transform infrared spectroscopy and thermogravimetry combined with mass spectrometry

Digestion of cattle manure under mesophilic and thermophilic conditions: characterization of organic matter applying thermal analysis and 1H NMR

Pyrolysis Characteristics and Kinetic Analysis of Sediment from the Dianchi Lake in China

Contact Info

Product

Resources

About