Synthesis of biogas-residue-based mesoporous carbons via one-step template-free method for organic and inorganic pollutants removal

Qian, Hongliang; Yin, Donghang; Qin, Beichen; Li, Licheng; Zhu, Jiahua; Mu, Liwen; Li, Caolong; Dong, Bin; Huang, Dechun; Lü, Xiaohua

doi:10.1016/j.fuel.2021.122516

Cited by 8 publications

(5 citation statements)

References 62 publications

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“…Therefore, the activated carbon preparation from low-valued biomass not only has the advantage of resource utilization but also achieves the purpose of energy conservation and emission reduction. 4,5 It is well known that the BET area and yield are usually the two key indexes to evaluate the performance of activated carbon acquired from biomass and its derivatives. Meanwhile, the requirements for activated carbon must be per the variation of the adsorption objects and their properties.…”

Section: Introductionmentioning

confidence: 99%

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Machine Learning Prediction of the Yield and BET Area of Activated Carbon Quantitatively Relating to Biomass Compositions and Operating Conditions

Wang

Jiang

et al. 2023

Ind. Eng. Chem. Res.

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Although activated carbon’s yield (quantity index) and BET area (quality index) are crucial to its application, the two indexes must be accurately predicted. Herein, biomass compositions (ultimate analysis, proximate analysis, and chemical analysis), operating conditions (mass ratio, carbonization time, carbonization temperature, activation time, and activation temperature) under physical activation (CO2 and steam), and chemical activation (H3PO4, KOH, and ZnCl2) conditions as input parameters were used to predict the two indexes of activated carbon simultaneously through the random forest (RF) method for the first time. In total, the samples (>1500 data) identified from experiments in the literature were used to train, validate, and test the RF models. The results show that the model built on ultimate analysis is more suitable for predicting the BET area and yield of activated carbon prepared by both physical and chemical activation. Therein, the R 2 values of activated carbon’s yield and BET area under the H3PO4 activation condition were the highest, which were 0.98 and 0.97, respectively. In addition, the influence of various factors and interactions on the target variables was analyzed. The results show that the hydrogen content has a large impact on the yield under physical activation conditions, and the mass ratio has the most contribution to the BET area under chemical activation conditions. This study affords achievable hints to the quantitative prediction of porous materials affected by multiple compositions of raw materials and different operating conditions.

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Section: Introductionmentioning

confidence: 99%

“…If it cannot be utilized effectively, it will also give rise to pollution of the environment accordingly. Therefore, the activated carbon preparation from low-valued biomass not only has the advantage of resource utilization but also achieves the purpose of energy conservation and emission reduction. , …”

Section: Introductionmentioning

confidence: 99%

Machine Learning Prediction of the Yield and BET Area of Activated Carbon Quantitatively Relating to Biomass Compositions and Operating Conditions

Wang

Jiang

et al. 2023

Ind. Eng. Chem. Res.

Self Cite

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“…Meanwhile, the reactive metal is usually introduced to the porous carbon carrier by wet impregnation These methods usually require a large amount of solvent together with a long drying process. In addition to the wet method, the solid‐state synthesis of mesoporous carbon materials such as statically solvent‐free method, [20] manually grinding, [21] or ball milling, [22] has been put forward during the past few years. However, there are still many problems in the mechanochemical method that need to be solved, such as the limitation of continuous production and the poor control of processing temperature [23] .…”

Section: Introductionmentioning

confidence: 99%

Processing Poly (ethylene terephthalate) Waste into Functional Carbon Materials by Mechanochemical Extrusion

Duan

Zhang

et al. 2022

ChemSusChem

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With the plastic pollution becoming worse, the upcycling of plastic waste into functional materials is a great challenge. Herein, a mechanochemical extrusion approach was developed for processing poly(ethylene terephthalate) (PET) waste into porous carbon materials. The essence of the cyclic extrusion approach lies in the solvent‐free mixing of thermoplastic PET with pore‐directing additive (e. g., silica or zinc chloride) at the molecular level. PET waste could be upcycled into functional carbon with high surface area (up to 1001 m2 g−1), specific shapes, and preferred mechanical strength, after cyclic extrusion and carbonization. Moreover, metal species could be well dispersed onto porous carbons through solvent‐free extrusion, different from traditional loading methods (impregnation method, deposition‐precipitation method). In this manner, mechanochemical extrusion provides an alternative for upcycling plastic waste into value‐added materials.

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“…13,14 However, it is a batch process and needs excessive time for solvent evaporation and a large number of organic solvents. 15 In the past few years, solid-state synthesis such as statically solvent-free method, 16 manually grinding, 17,18 ball milling 19,20 have been applied in the synthesis of the mesoporous carbon-supported metal catalysts. However, those mechanochemical methods still suffer from several problems, such as the limitation of continuous production, the poor control of processing temperature, and the lack of related chemical law models.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Extrusion Synthesis of Mesoporous Carbon-Supported Metal Catalysts for Selective Hydrogenation

Zhang

Hou

et al. 2022

Preprint

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The mesoporous carbon-supported metal catalysts are important materials in heterogeneous catalysis. From the standpoint of process intensification, the current synthesis methods still suffer from several issues, such as the excessive use of toxic solvents, the time-consuming self-assembly process, and the difficulty of continuous production. Herein, we report a solvent-free and continuous route to synthesize mesoporous carbon-supported metal catalysts. Interestingly, the use of cyclic extrusion could promote the mixing, coordination, and assembly of catalyst precursors (tannin-metal salts-additives) by shearing and squeeze force. The as-made mesoporous carbon-supported nickel showed high surface areas (up to 512m2g-1), narrow pore size distribution (~10 nm), and good performance in the selective hydrogenation of nitrobenzene to aniline (Conv.>99%; Sel.>99%). In addition, the fluid property of catalyst precursors and the geometry of the twin-screw extrusion channel were studied, and the essence of this cyclic extrusion process is also discussed.

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Synthesis of biogas-residue-based mesoporous carbons via one-step template-free method for organic and inorganic pollutants removal

Cited by 8 publications

References 62 publications

Machine Learning Prediction of the Yield and BET Area of Activated Carbon Quantitatively Relating to Biomass Compositions and Operating Conditions

Machine Learning Prediction of the Yield and BET Area of Activated Carbon Quantitatively Relating to Biomass Compositions and Operating Conditions

Processing Poly (ethylene terephthalate) Waste into Functional Carbon Materials by Mechanochemical Extrusion

Cyclic Extrusion Synthesis of Mesoporous Carbon-Supported Metal Catalysts for Selective Hydrogenation

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