Analysis of thermal processing applied to contaminated soil for organic pollutants removal

Bulmau, Cora; Mărculescu, Cosmin; Lu, Shengyong; Qi, Zhifu

doi:10.1016/j.gexplo.2014.08.005

Cited by 39 publications

(12 citation statements)

References 7 publications

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“…High temperatures conduct to a high rate of polyaromatic hydrocarbons (PAHs) degradation by pyrolysis. In case of 650 °C, the thermal process efficiency is about 80% for PAHs pyrolysis during 30 min . Finally, the change observed between 640 °C and 720 °C (zone C) may correspond to high molecular weight component desorption initialized by pyrolysis.…”

Section: Resultsmentioning

confidence: 94%

Identification of the coke deposited on 13X industrial zeolite molecular sieves during mercaptan removal process

Asl

Sargolzaei

Moosavi

2015

Asia-Pacific J Chem Eng

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Industrial Z10-13X zeolite was deactivated by coking during the sequenced pressure and temperature swing mercaptan removal unit at the conditions of 40°C and 68 bar in adsorption mode and 300°C and 8 bar in regeneration mode. In this study, detailed coke features inside industrial molecular sieves, in terms of molecular structure and also some other brief properties, have been obtained for the first time by combining numerous techniques including gas chromatography coupled with mass spectrometry, thermogravimetric analysis, Brunauer-Emmett-Teller analysis, energy-dispersive X-ray spectroscopy, X-Ray diffraction pattern, and also CO 2 and N 2 adsorption/desorption isotherms of fresh and coked molecular sieves. The coke species were identified and classified into more than 40 different components following their alkylation and cyclization mechanisms. The coke includes polyaromatic hydrocarbons, and it was much alkylated especially with methyl and ethyl fragments. It is mainly compounded of derivatives of benzene located within the zeolite pore, which could grow into polyaromatic compounds constituted up to four aromatic rings with different guest polar elements.

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Section: Resultsmentioning

confidence: 94%

Identification of the coke deposited on 13X industrial zeolite molecular sieves during mercaptan removal process

Asl

Sargolzaei

Moosavi

2015

Asia-Pacific J Chem Eng

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“…The design of the FCW air gasification process in the batch tubular reactor is shown in Figure 1. A detailed presentation of the reactor main geometrical characteristics and potential configurations and runs, along with the transitory regime's mechanism are presented in previous papers of the authors [31][32][33][34]. Briefly, in the experimental runs the batch reactor (1.)…”

Section: Methodsmentioning

confidence: 99%

“…Air gasification process experimental set-up (adopted after[30][31][32][33][34] 1. Externally heated batch reactor; 2.…”

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confidence: 99%

Experimental study of Food Court Waste air gasification process performances in a batch reactor

et al. 2019

Self Cite

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The paper presents the experimental results of Food Court Waste air gasification using a batch reactor. This type of waste is generated mainly in the food court areas of services spaces, shopping centers, airports and malls and is generally composed of paper & cardboard, plastic, organic, wood, metal and glass waste. The process operating parameters were: temperatures between 650°C and 850°C and an equivalent ratio of 0.25 and 0.4 respectively. The study focused on the influence of process parameters on the energy conversion rate considering the cold gas and hot gas efficiency correlated with the feedstock carbon conversion rate. The recorded instantaneous concentrations of sampled gas species were plotted in time dependent graphs for accurate variation curves of gases concentrations. The results can be used to isolate the startup stage of the gasification process and to establish the optimal process parameters for increased overall energy efficiency. In conclusion, considering the current setup, operational parameters and process energy efficiency, the optimal temperature for the air gasification of Food Court Waste is 850ºC with an equivalent ratio of 0.40.

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“…In addition to various heating types, there are many other factors influencing the performance of the thermal desorption (TD) system, for instance, heating temperature, heating rate, physical and chemical properties of soil, initial concentration of contaminants, and so on [15][16][17][18]. Bulmau et al [19] studied the effect of heating temperature on soils polluted by polycyclic aromatic hydrocarbons (PAHs) and indicated that the removal efficiency increased from 5% at 350 • C to 80% at 650 • C when processed for the same time. Qi et al [20] found that the removal efficiencies after heating at 600 • C for 20 min, 40 min and 60 min are 20.86%, 64.47% and 95.7% respectively.…”

Section: Introductionmentioning

confidence: 99%

Planned Heating Control Strategy and Thermodynamic Modeling of a Natural Gas Thermal Desorption System for Contaminated Soil

Gao

et al. 2020

Energies

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This paper presents a planned heating control strategy applied for a natural gas thermal desorption system for polluted soil to achieve the dynamic adjustment of the heating time and energy consumption. A lumped-parameter model for the proposed system is established to examine effects of the natural gas mass flow rate and the excess air coefficient on the heating performance of the target soil. The control strategy is explored to accomplish the heating process as expected with constant temperature change rate or constant volumetric water content change rate at different phases by adapting the natural gas flow. The results demonstrate that the heating plan can be realized within the scheduled 36 days and the total natural gas consumption can be reduced by 24% (1487 kg) compared to that of the open-loop reference condition, which may be widely applied for other thermal remediation systems of the polluted soil.

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Analysis of thermal processing applied to contaminated soil for organic pollutants removal

Cited by 39 publications

References 7 publications

Identification of the coke deposited on 13X industrial zeolite molecular sieves during mercaptan removal process

Identification of the coke deposited on 13X industrial zeolite molecular sieves during mercaptan removal process

Experimental study of Food Court Waste air gasification process performances in a batch reactor

Planned Heating Control Strategy and Thermodynamic Modeling of a Natural Gas Thermal Desorption System for Contaminated Soil

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