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Pyrolysis of woody biomass to obtain pyroliginous acid was started hundreds of years ago, which has versatile applications. ... Bricka M, Smith F, Yancey B, Mohammad J. Sorption of arsenic, cadmium, and lead by chars produced from fast pyrolysis of wood and bark during bio‐oil production. Journal of Colloid and Interface Science. 2007; 310:57 ...
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Synergistic effects of Co-pyrolysis on the immobilization and transformation of lead (Pb), chromium (Cr), nickel (Ni), and fluorine (F) in phosphogypsum-biomass mixtures ... (CS), cellulose (C), lignin (L), glucose (G). Co-pyrolysis occurred at varying temperatures (600 °C, 700 °C, 800 °C, and 900 °C) and different addition ratios (10%, 15% ...
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The decrease in the H/C and O/C ratios with increasing pyrolysis temperature can be explained by progressive dehydration, pyrolysis, decarboxylation reactions, and formation of structures …
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Thermally induced chemical decomposition of organic materials in the absence of oxygen is defined as pyrolysis. This process has four major application areas: (i) production of carbon materials ...
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Here we propose a synergistic pyrolysis strategy to recover valuable metals by thermally treating LiNi1/3Co1/3Mn1/3O2 and polyethylene terephthalate. ... Stage 3 could lead to a mass loss of 5.3% ...
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Elevated level of lead (Pb) in water is a health concern that can cause reproductive and immunological defects. Pyrolyzed carbon-rich material (biochar) has been reported to be …
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Co-pyrolysis of alkali-fused fly ash and corn stover to synthesize biochar composites for remediating lead-contaminated soil ... 10:2, and 10:5 (AB500-1, AB500-2, and AB500-5), was used to remediate lead (Pb)-contaminated soil. Compared with pristine biochars (BCs), ABs were enriched with oxygen-containing functional groups (Si-O-Si and Si-O ...
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Effect of different pyrolysis temperatures on physico-chemical characteristics and lead ... Biochar is a carbon-rich product produced by the pyrolysis of various waste materials including wood, poultry litter, and crop residues. 10–13 Biochar possesses a …
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The calculation of pyrolysis heat consumption in the coal coking process is based on a fixed empirical formula and the empirical value of heat consumption relies on the size of the coke oven [9]. However, changes in coal types and pyrolysis conditions can lead to variations in the pyrolysis reaction.
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The aim of this study was to remediate lead (Pb), cadmium (Cd) and zinc (Zn) from contaminated soil and stabilize to pyrolysis solid product. To accomplish this, phytoremediation of soil contaminated with Pb, Cd and Zn by different plants (sunflower, corn and rape) was performed with and without ethylenediaminetetraacetic acid (EDTA).
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Pyrolysis can be operated at atmospheric pressure. Hence, the conversion of biomass into a liquid fuel via pyrolysis has attracted great interest. Pyrolysis of biomass is categorised to slow and fast pyrolysis, according to the heating rate during pyrolysis. ... It is mainly composed of oxygenated compounds, which lead to the high thermal ...
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Higher residence times and higher fuel partial pressures lead to faster pyrolysis with respect to temperature, thus resulting in a lower T thres for each fuel. For example, for CH 4 the T thres lowers by ~70 K when the fuel partial pressure is increased from 0.04 to 0.5 bar for a residence time of 3.25 ms.
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Pyrolysis of Lead tree wood is carried out in an Iwasaki kiln by courtesy of Energy Ashram: Appropriate Technology Association (Nakhon Ratchasima, Thailand). The components are illustrated in ...
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A twin-fluid atomization spray pyrolysis technique has been used to produce lead zirconate titanate (PZT) powders from a sol–gel precursor solution. Samples were removed from ports sited along the reactor in order to examine particle development at progressive stages of pyrolysis. The total time in the reactor was 2.6 s.
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Batch sorption experiments were carried out to determine the sorption capacity of the biochars for lead (Pb) in aqueous solutions. Results showed that the cation exchange …
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The change of crystal structure confirmed that precipitation was the main mechanism of lead adsorption and that the tobacco stem biochar obtained at 700 °C for around 2 h was excellent adsorbent for lead clearance, since high temperature pyrolysis could promote the formation of carbonates but they would be decomposed under long-time exposure.
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The technological factors such as pyrolysis temperature can be controlled to achieve the desired sorption capacities in preparation of biochars [9], [10].Since biochars are obtained through pyrolysis of feedstocks at a wide range of temperatures [11], the peak pyrolysis temperature is a key factor determining the physicochemical properties of biochars [2], [3].
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In this study, we investigated the impact of biochar, produced at diferent temperatures, on the behavior of arsenic (As) and lead (Pb) in leached sediments. Before leaching, we combined …
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Analytical pyrolysis is currently showing tremendous potential for investigating biomass conversion into chemicals and biofuels, of which the most notable is the pyrolyzer coupled with the gas chromatography/mass spectrometry (Py-GC/MS) technique. ... For example, the sensitivity and limit of detection of GC/MS can lead to accuracy issues when ...
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Introduction. Biochar is a carbon (C)-rich material produced by thermal decomposition of biomass in an oxygen-limited environment (Al-Wabel et al. 2013).Biochar typically has a high sorption capacity for contaminants, and on a long-term basis, it may also sequester C (Zhang et al. 2014; Dong et al. 2015).Due to its large specific surface area (SSA), a variety of surface functional …
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Lead exists in the form of PbS (s) before 500°C, and gradually transforms into PbS (g) and Pb (g) with the increase of temperature. To study the behavior of arsenic (As) and lead …
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The pyrolysis process allows the anaerobic thermochemical decomposition of plastic waste at high temperature with or without the presence of a catalyst to obtain biofuels, ... In the case of PE, it is easier at high heating rates, as moving to the area of higher energy would lead to greater bond breakage, as it is a linear structure . 4 ...
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The results showed that compared with SS pyrolysis alone, co-pyrolysis of SS with various organic components of RHW lead to a higher derivative weight increased from 1.4 to 17.5%/min and more COx and CHm gas yielded and accounted for the mos. Meanwhile, the pilot-scale tests of co-pyrolysis were conducted by monitoring the temperature ...
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Herein, a multitude of characterization studies are done to probe into the debromination efficiency of lead oxide (PbO) during its co-pyrolysis with TBBPA-DAE via products (char, gas and condensates) analyses. The thermogravimetric analysis suggested a pyrolytic run up to 600 °C. The GCMS analysis showed that the release of brominated ...
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Observed hydrogen-substituted products indicate that functional groups with higher hydrocarbon character may lead to more H-abstraction terminated products. Overall findings show that the functional group of a PFAS may decrease or increase its thermal stability and lead to different profiles of pyrolysis products. Graphical Abstract. Download ...
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Lead sulfide is used as a catalyst for pyrolysis, therefore the sulfur compounds of liquid and wax products were determined. The absence of sulfur compounds in liquid and wax products confirmed that the melting point and decomposition temperature of lead sulfide are above 1000 °C.
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A twin-fluid atomization spray pyrolysis technique has been used to produce lead zirconate titanate (PZT) powders from a sol–gel precursor solution. Samples were removed from ports sited along the reactor in order to examine particle development at progressive stages of pyrolysis. The total time in the reactor was 2.6 s. The size and shape of the particles showed …
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The aim of this study was to remediate lead (Pb), cadmium (Cd) and zinc (Zn) from contaminated soil and stabilize to pyrolysis solid product. To accomplish this, phytoremediation of soil contaminated with Pb, Cd and Zn by different plants (sunflower, corn and rape) was performed with and without ethylenediaminetetraacetic acid (EDTA). According to …
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Behavior of chromium, nickel, copper, zinc, cadmium, mercury, and lead during the pyrolysis of sewage sludge
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Phosphorus-rich biochar produced through bean-worm skin waste pyrolysis enhances the adsorption of aqueous lead ... Pyrolysis was proved to be an effective approach in improving the adsorption performance of BWS toward Pb(II). In comparison with BWS, the good buffering ability of BWS-BC due to the higher pH value of the later adsorbent than the ...
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The thermal behavior of the lead-impregnated olive-stone during pyrolysis was investigated via thermogravimetric analysis at different heating rates under an inert atmosphere of nitrogen to study the effect of the metal during the thermal process. Thermogravimetric curves showed a little increase of the degradation temperature of hemicellulose and cellulose because …
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A review of biomass pyrolysis gas: Forming mechanisms, influencing parameters, and product application upgrades. ... This will lead to a reduction in solid products but an increase in gaseous products [71]. As a result, high temperatures are appropriate for gaseous production, particularly when the pyrolysis reaction temperature exceeds 723 K. ...
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The trace elements emission ratios of TXH and SH were lower during fast pyrolysis than slow pyrolysis, especially for cadmium and lead. At 1123 K, all cadmium and 30.5% of lead escaped from SH during slow pyrolysis, while only 49.2% of cadmium and 9.8% of lead emitted during fast pyrolysis. Different from SH and TXH, there were always more ...
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DOI: 10.1016/J.PSEP.2017.11.015 Corpus ID: 85540317; Pyrolysis kinetics of the lead-impregnated olive stone by non-isothermal thermogravimetry @article{MartnLara2018PyrolysisKO, title={Pyrolysis kinetics of the lead-impregnated olive stone by non-isothermal thermogravimetry}, author={M. A. Mart{'i}n-Lara and A. Ronda and Gabriel …
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The pyrolysis of mixed plastics was more complex than that of single plastics due to the interaction of pyrolysis intermediates of different types of plastics, which may lead to lower oil yields depending on the specific mixed plastic components. Pyrolysis of mixed plastics also has its advantages. For example, hydrogen-rich plastics such as PE ...
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Co-pyrolysis of alkali-fused fly ash and corn stover to synthesize biochar composites for remediating lead-contaminated soil. ... (Fig. 2) could react with Pb to form highly insoluble carbonate and lead silicate precipitates, thereby significantly reducing the bioavailability of Pb in the contaminated soil, particularly in ABs produced at high ...
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