Kinetic study of the energetic reuse from torrefied sewage sludge and urban pruning blends

Nozela, Weverton Campos; Nozela, C. F. V.; Silva, F. R.; Dias, D. S.; Almeida, Sônia de; Ribeiro, Clóvis Augusto; Crespi, Marisa Spirandeli

doi:10.1007/s10973-018-7534-y

Cited by 8 publications

(4 citation statements)

References 24 publications

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“…The kinetic study (ASTM E698, Friedman and Flynn-Wall-Ozawa methods) was carried out on the main decomposition step that took place between 190 and 310 • C while using the AKTS Thermokinetics Software Version 5.2 (AKTS AG TechnoArk, Siders, Switzerland). The mathematical background and importance of using isoconversional kinetic methods have been extensively reported in the literature [41][42][43][44][45][46]. The decomposing mechanism of CC and solid pharmaceutical formulation CCTAB was evaluated by using the modified NPK method by a protocol that has been previously reported by our research group [47][48][49][50][51][52].…”

Section: Kinetic Investigationsmentioning

confidence: 99%

Solid State Stability and Kinetics of Degradation for Candesartan—Pure Compound and Pharmaceutical Formulation

et al. 2020

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The aim of this work was to assess the impact of an excipient in a pharmaceutical formulation containing candesartan cilexetil over the decomposition of the active pharmaceutical ingredient and to comparatively investigate the kinetics of degradation during thermolysis in an oxidative atmosphere under controlled thermal stress. To achieve this, the samples were chosen as follows: pure candesartan cilexetil and a commercial tablet of 32 mg strength. As a first investigational tool, Universal attenuated total reflection Fourier transform infrared (UATR-FTIR) spectroscopy was chosen in order to confirm the purity and identity of the samples, as well as to check if any interactions took place in the tablet between candesartan cilexetil and excipients under ambient conditions. Later on, samples were investigated by thermal analysis, and the elucidation of the decomposition mechanism was achieved solely after performing an in-depth kinetic study, namely the use of the modified non-parametric kinetics (NPK) method, since other kinetic methods (American Society for Testing and Materials—ASTM E698, Friedman and Flynn–Wall–Ozawa) led to inadvertencies. The NPK method suggested that candesartan cilexetil and the tablet were degraded by the contribution of two steps, the main being represented by chemical degradation and the secondary being a physical transformation. The excipients chosen in the formulation seemed to have a stabilizing effect on the decomposition of the candesartan cilexetil that was incorporated into the tablet, relative to pure active pharmaceutical ingredient (API), since the apparent activation energy for the decomposition of the tablet was 192.5 kJ/mol, in comparison to 154.5 kJ/mol for the pure API.

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Section: Kinetic Investigationsmentioning

confidence: 99%

Solid State Stability and Kinetics of Degradation for Candesartan—Pure Compound and Pharmaceutical Formulation

et al. 2020

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“…The elemental composition of biomass directly influences its energy potential since a variation of around 1.0% in the contents of carbon and/or ash can significantly change the calorific value of the sample of the order of 0.4 MJ kg −1 and 0.2 MJ kg −1 , respectively [50]. Table 1 shows the percentage values of carbon, hydrogen, nitrogen, sulfur, and oxygen provided by ultimate analysis for pure samples and blends and the minimum formula (C a H b N c O d S e ) obtained by dividing the quantified percentage of chemical elements by their respective atomic weights [51].…”

Section: Proximate Ultimate and Heating Value Analysesmentioning

confidence: 99%

Evaluation of the Bioenergy Potential of Blends (Green Coconut Shells and Fish Scales) as a Feedstock in Thermochemical Processes for Clean Energy Production

Monroe,

Silva,

Melo

et al. 2024

Processes

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Brazil is among the world’s largest producers of green coconut, which contributes to inappropriate disposal and socioenvironmental impacts. Concomitantly, some of its coastal cities produce a great diversity of fish and large amounts of solid waste. This paper reports on the use of samples of fish scales (100FS) and green coconut shells (100GCS) and their mixtures in 75%FS:25%GCS (B25), 50%FS:50%GCS (B50), and 25%FS:75%GCS (B75) proportions and quantification of their Higher Heating Values (HHV) and Lower Heating Values (LHV), and Ultimate (UA) and Proximate Analyses (PA). Their thermal behavior was investigated by thermogravimetry (TG/DTG) and differential scanning calorimetry (DSC), whereas scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and Fourier transformed infrared (FTIR) were employed for analyses of their physicochemical and morphostructural properties. When compared to in natura samples, SEM images of the blends detected a structural disorder and a highly fibrous structure with an elongated chain and surface roughness. HHV were superior in samples with 100GCS (16.64 MJ kg−1), B75 (15.80 MJ kg−1), and B50 (14.98 MJ kg−1), and lower in B25 (14.16 MJ kg−1) and 100FS (13.03 MJ kg−1), with acceptable values for different biomasses. TG/DTG and DSC curves showed similarities among the samples, with the detection of their main thermoconversion stages. According to the data, the samples can be applied as renewable energy sources to mitigate socioecological illnesses and social vulnerabilities resulting from the archaic and inadequate management of solid waste.

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“…Until now, several related sludge studies were executed by some researchers on the basis on disparate views. Plenty of scholars have investigated sewage sludge reuse directions, such as material angles (Yuchi et al 2020;Zhi-Xiang et al 2019), agricultural perspective (Mirko et al 2019;Cassio et al 2019;Bo et al 2019), health effects (Choudri and Yassine 2019), the biological perspective (Patrick et al 2019;Agata et al 2019), land application (Liping et al 2019), chemical angles (Xueya et al 2019;Jialin et al 2020), Urban field (Nozela et al 2018), life cycle assessment (LCA) perspective (Raphael et al 2018;Domagoj Nakic 2018), and systematic assessment framework (Ferrans et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Comparative environmental sustainability study of an improved sewage sludge treatment and sludge reuse system based on emergy analysis in China

Zhang

2021

Appl Water Sci

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As the significant residuals in the sewage treatment system, sludge treatment and reuse play a pivotal impact on the environmental sustainability study in China. In this paper, two sewage sludge treatment systems have been investigated, calculated, and analyzed, including the conventional treatment system (Scenario A) and improved reuse system (Scenario B), respectively. The results demonstrate that (1) Compared to Scenario A, Scenario B is a comprehensive system, which integrates a sewage sludge treatment system and a brick production system for sludge recycling. (2) After considering the brick system (scenario B), on the one hand, the sludge treatment capacity has been enhanced and raised sludge utilization; on the other hand, negative influences have also generated due to the non-renewable resources input and several outputs. (3) In Scenario A and Scenario B, the input resources part reflects the main impact (about 59.6% in the entire emergy value). (4) In this new paper, the UEVs are 2.73E + 11sej/kg and 6.29E + 11sej/kg in Scenario A and Scenario B, respectively. (5) The emergy sustainability indexes (ESI) are 0.012292 and 0.00848, which express the weak comprehensive effects in Scenario A and Scenario B. (6) Scenario B has a more extensive range of change than Scenario A because of the more resource input for the sensitivity analysis. Given the all discussions, there are two effective approaches to be used for perfecting environmental sustainability in the Scenario A system and Scenario B system.

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Kinetic study of the energetic reuse from torrefied sewage sludge and urban pruning blends

Cited by 8 publications

References 24 publications

Solid State Stability and Kinetics of Degradation for Candesartan—Pure Compound and Pharmaceutical Formulation

Solid State Stability and Kinetics of Degradation for Candesartan—Pure Compound and Pharmaceutical Formulation

Evaluation of the Bioenergy Potential of Blends (Green Coconut Shells and Fish Scales) as a Feedstock in Thermochemical Processes for Clean Energy Production

Comparative environmental sustainability study of an improved sewage sludge treatment and sludge reuse system based on emergy analysis in China

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