Comparative study on synergistic effects in co-pyrolysis of tobacco stalk with polymer wastes: Thermal behavior, gas formation, and kinetics

Chen, Rongjie; Zhang, Jianhui; Lun, Liyong; Li, Qinghai; Zhang, Yanguo

doi:10.1016/j.biortech.2019.121970

Cited by 61 publications

(30 citation statements)

References 48 publications

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“…This was also consistent with previous studies that reported high chlorine content worsens the sensory quality of cigarettes, possibly because chlorine inhibits the release of aromatic components such as Maillard products. 26 , 27 …”

Section: Resultsmentioning

confidence: 99%

Quantitative Analysis of Routine Chemical Constituents of Tobacco Based on Thermogravimetric Analysis

et al. 2022

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As the most basic indexes to evaluate the quality of tobacco, the contents of routine chemical constituents in tobacco are mainly detected by continuous-flow analysis at present. However, this method suffers from complex operation, time consumption, and environmental pollution. Thus, it is necessary to establish a rapid accurate detection method. Herein, different from the ongoing research studies that mainly chose near-infrared spectroscopy as the information source for quantitative analysis of chemical components in tobacco, we proposed for the first time to use the thermogravimetric (TG) curve to characterize the chemical composition of tobacco. The quantitative analysis models of six routine chemical constituents in tobacco, including total sugar, reducing sugar, total nitrogen, total alkaloids, chlorine, and potassium, were established by the combination of TG curve and partial least squares algorithm. The accuracy of the model was confirmed by the value of root mean square error for prediction. The models can be used for the rapid accurate analysis of compound contents. Moreover, we performed an in-depth analysis of the chemical mechanism revealed by the result of the quantitative model, namely, the regression coefficient, which reflected the correlation degree between the six chemicals and different stages of the tobacco thermal decomposition process.

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Section: Resultsmentioning

confidence: 99%

Quantitative Analysis of Routine Chemical Constituents of Tobacco Based on Thermogravimetric Analysis

et al. 2022

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“…Tobacco stems are a precious and valuable resource. Some studies have shown that biochar derived from tobacco stems had a better effect in treating heavy metals in wastewater and improving soil amendment [51][52][53]. The preparation of tobacco stems into biochar enhanced its own added value and could be applied in the industry.…”

Section: Engineering Implicationmentioning

confidence: 99%

Facile Synthesis of Magnetic Biochar Derived from Burley Tobacco Stems towards Enhanced Cr(VI) Removal: Performance and Mechanism

et al. 2022

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In this study, ferric-loaded magnetic burley tobacco stem biochar (MBTS) was synthesized via pyrolysis to improve the removal of Cr (VI). The results showed that MBTS had an adsorption capacity of 54.92 mg Cr (VI)/g, which was about 14 times higher than raw burley tobacco stem biochar (i.e., 3.84 mg/g). According to the findings obtained, a three-step mechanism of Cr (VI) removal by MBTS was further put forward, i.e., (1) Cr (VI) exchanged with hydroxyl groups on MBTS, (2) the reduction in Cr (VI) to Cr (III) mediated by oxygen-containing groups, and (3) the chelation of produced Cr (III) with the amino groups on MBTS. FTIR spectra further revealed that C-N, C-H, and C=C groups played an important role in Cr (VI) removal. Furthermore, the adsorption equilibrium and kinetics of Cr (VI) on MBTS could better be described by the Langmuir equation and pseudo-second-order rate equation. This study clearly demonstrated that ferric-loaded biochar derived from burley tobacco stems could serve as a cost-effective magnetic adsorbent for the high-efficiency removal of soluble Cr (VI) from wastewater. Tobacco stem-adsorbed Cr (VI) realized a green path for treating waste by waste.

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“…When HS was mixed with PP, the PP was completely degraded at approximately 500 • C, the original space occupied by the PP formed a pore structure. At the same time, porous effect enhanced heat transfer effect, causing the pyrolysis process more homogeneous as a result [21]; in addition, the synergistic effects during the co-pyrolysis of biomass and plastic are also beneficial for the degradation of feedstock [27]. When the PP blending was more than 20%, the original pore structure was destroyed because the material is ablated during the process, resulting in decrease of specific surface area and pore volume.…”

Section: Surface Area and Pore Analysismentioning

confidence: 99%

Characterization of Biochars Produced by Co-Pyrolysis of Hami Melon (Cantaloupes) Straw Mixed with Polypropylene and Their Adsorption Properties of Cadmium

Huang

Zhang

et al. 2021

IJERPH

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Reuse of waste from Hami melon (cantaloupes) straws (HS) mingled with polypropylene (PP) ropes is necessary and beneficial to mitigate environmental pollution. The objective of this study was to investigate the characteristics and mechanisms of Cd2+ adsorption on biochars produced by co-pyrolysis of HS-PP with various mixing ratios. N2-sorption, scanning electron microscopy (SEM), energy dispersive X-ray spectrometer (EDS), elemental analysis, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermal gravity, and differential thermal gravity (TG/DTG) were applied to evaluate the physicochemical properties of materials. Batch adsorption experiments were carried out for investigating the effects of initial pH, Cd2+ concentration, and adsorption time. It was found that the Langmuir and pseudo-second-order models fitted best for the experimental data, indicating the dominant adsorption of co-pyrolysis biochars is via monolayer adsorption. Biochar derived at 4/1 mixing ratio of HS/PP by weight percentage had the highest adsorption capacity of 108.91 mg·g−1. Based on adsorption isotherm and kinetic analysis in combined with EDS, FTIR, and XRD analysis, it was concluded that the main adsorption mechanism of co-pyrolysis biochar involved the surface adsorption, cation exchange, complexation of Cd2+ with surface functional groups, and chemical precipitation. This study also demonstrates that agricultural wastes to biochar is a sustainable way to circular economy.

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Comparative study on synergistic effects in co-pyrolysis of tobacco stalk with polymer wastes: Thermal behavior, gas formation, and kinetics

Cited by 61 publications

References 48 publications

Quantitative Analysis of Routine Chemical Constituents of Tobacco Based on Thermogravimetric Analysis

Quantitative Analysis of Routine Chemical Constituents of Tobacco Based on Thermogravimetric Analysis

Facile Synthesis of Magnetic Biochar Derived from Burley Tobacco Stems towards Enhanced Cr(VI) Removal: Performance and Mechanism

Characterization of Biochars Produced by Co-Pyrolysis of Hami Melon (Cantaloupes) Straw Mixed with Polypropylene and Their Adsorption Properties of Cadmium

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