Influence of operating parameters on the microwave pyrolysis of rice husk: biochar yield, energy yield, and property of biochar

Sahoo, Diptiprakash; Remya, Neelancherry

doi:10.1007/s13399-020-00914-8

Cited by 52 publications

(24 citation statements)

References 40 publications

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“…The H/C and O/C ratios and (O+N)/C were analysed with a Leco TruSpec CHNS (St. Joseph, MI, USA) elemental analyzer. Based on the chemical compositions of biochars, the higher heating value (HHV) and energy density (ED) [ 25 ] were calculated using:

where C%–the carbon content; H%–the hydrogen content; O%–the oxygen content; S%–the sulphur content.…”

Section: Methodsmentioning

confidence: 99%

Effect of Biochar Modification by Vitamin C, Hydrogen Peroxide or Silver Nanoparticles on Its Physicochemistry and Tetracycline Removal

Tomczyk

Szewczuk-Karpisz

2022

Materials

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Chemical modification of biochars can improve their adsorption capacity relative to antibiotics, posing a serious threat to the environment. Therefore, this research is aimed at the treatment of sunflower husk biochar (BC) by vitamin C, hydrogen peroxide or silver nanoparticles and the impact of this procedure on the biochar porosity, surface chemistry, and ability to remove tetracycline (TC). During the study, BC was produced by pyrolysis of sunflower husks at 650 °C. All solids were characterized using potentiometric titration, nitrogen adsorption/desorption, Fourier transform infrared spectroscopy, etc. The experimental adsorption data was described by kinetics equations: pseudo-first order, pseudo-second order, and particle internal diffusion (IPD) models as well as by isotherms of Langmuir, Langmuir-Freundlich, and Redlich-Peterson. The obtained results indicated that the biochar upgraded by vitamin C (BCV) had the highest ability to attract antibiotic molecules and, as a result, the TC adsorption on its surface was the largest. Furthermore, the TC desorption from this material was minimal. The measured TC adsorbed amounts for the modified BCs were as follows: 47.75% (7.47 mg/g) for BCV, 37.35% (8.41 mg/g)-for biochar treated by hydrogen peroxide (BCH), and 42.04% (9.55 mg/g) for biochar modified by silver nanoparticles (BCA). The lowest adsorption level was noted for non-modified biochar, i.e., 34.17% (6.83 mg/g). Based on the presented results it can be stated that the upgraded biochars had a good potential to improve the tetracycline removal from aqueous media, e.g., groundwater.

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where C%–the carbon content; H%–the hydrogen content; O%–the oxygen content; S%–the sulphur content.…”

Section: Methodsmentioning

confidence: 99%

Effect of Biochar Modification by Vitamin C, Hydrogen Peroxide or Silver Nanoparticles on Its Physicochemistry and Tetracycline Removal

Tomczyk

Szewczuk-Karpisz

2022

Materials

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“…One of the most frequently used second-order designs is central composite design (CCD) (Pagalan et al, 2020;Sahoo and Remya, 2020), which consists of three portions: a factorial (cube) portion (coded as − 1, +1), an axial portion (coded as -α, + α), and n 0 centre points (Benredouane et al, 2016). Screening analysis by PBD showed the significant contribution of pyrolysis temperature (A) and time (B) on most of the responses (Y x ).…”

Section: Methodsmentioning

confidence: 99%

Optimising production of a biochar made from conifer brash and investigation of its potential for phosphate and ammonia removal

Pap

Gaffney²,

Zhao³

et al. 2022

Industrial Crops and Products

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“…In microwave pyrolysis of biomass, the heat transfer is more efficient as the heat is generated within the core of material by the interaction of microwaves with biomass (Foong et al 2020), hence leading to energy saving. The microwave power and interaction of heating time and microwave power positively affected the maximum yield of biochar (Sahoo and Remya 2020). The pyrolysis heating rate greatly depends on the temperature, power of the microwave, microwave absorb ability and pyrolysis feedstock (Lee et al 2020).…”

Section: Microwave-assisted Pyrolysismentioning

confidence: 99%

Advances in preparation, application in contaminant removal, and environmental risks of biochar-based catalysts: a review

Yang

Dai

Zhao

et al. 2022

Biochar

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As a carbon-rich material produced by pyrolysis of biomass, biochar features low cost, large specific surface area, and widely available feedstocks based on the functional diversity and environmental-friendly properties, it has received increasing attention in the fields of pollutant removal due to three win–win effects of water remediation, carbon sequestration and reutilization of wastes. To design excellent biochar-based catalysts for environmental applications, one must understand recent advances in the catalysts for contaminant removal. This review focuses on the current application of biochar-based catalysts in redox systems, Fenton-like systems, sonocatalytic systems and photocatalytic systems. Besides in-depth discussion in effects of preparation conditions on physicochemical characteristics of biochars, the review supplements new preparation technologies of biochar and biochar-based catalysts. Most importantly, the advantages/shortcomings, catalysis mechanisms, as well as the pollutant removal ability of different types of biochar-based catalysts are discussed. The environmental risks of the catalyst applications are also elaborated on. Future research on biochar-based catalyst production and its environmental applications is discussed. The review provides a good overview of the current advances of biochar-based catalysts in pollutant control and the futureresearch directions. Graphical Abstract

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Influence of operating parameters on the microwave pyrolysis of rice husk: biochar yield, energy yield, and property of biochar

Cited by 52 publications

References 40 publications

Effect of Biochar Modification by Vitamin C, Hydrogen Peroxide or Silver Nanoparticles on Its Physicochemistry and Tetracycline Removal

Effect of Biochar Modification by Vitamin C, Hydrogen Peroxide or Silver Nanoparticles on Its Physicochemistry and Tetracycline Removal

Optimising production of a biochar made from conifer brash and investigation of its potential for phosphate and ammonia removal

Advances in preparation, application in contaminant removal, and environmental risks of biochar-based catalysts: a review

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