Biochar as potential sustainable precursors for activated carbon production: Multiple applications in environmental protection and energy storage

Tan, Xiaofei; Liu, Shaobo; Liu, Yunguo; Gu, Yanling; Zeng, Guangming; Hu, Xinjiang; Wang, Xin; Liu, Shao-heng; Jiang, Luhua

doi:10.1016/j.biortech.2016.12.083

Cited by 526 publications

(199 citation statements)

References 97 publications

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“…[3,28] C The process additionally includes self-activated reactions of carbonaceous materialw ith release of H 2 Oa nd CO 2 [Reactions (1)-(3)], which accelerate the decomposition of tars and disorganized carbon and thus promote formation of the porous structure.…”

Section: Preparation Of Activated Carbon:a Ctivation Processmentioning

confidence: 99%

“…[3,28] The chemical activation approach is based on the use of KOH as an activator.I na ddition to the high-temperature Reactions (1)-(3), it includes KOH-induced Reactions (4)- (8), which effectively accelerate formation of the porouss tructure. [3,28,68] According to the generally accepted mechanism, the key role of KOH involves etching of the carbon matrix by K-containing speciest hrough the reactions (6)- (8), which usually produce abundant micro-and mesopores, whereas gaseous CO 2 and H 2 Op articipate in the carbon gasification and developp orosity. [3,28,31,68] In addition, metallic Ki ntercalates into the carbon lattice.S ubsequentr emoval of the intercalated Kc ompounds by washing produces enhanced microporosity.…”

Section: Preparation Of Activated Carbon:a Ctivation Processmentioning

confidence: 99%

“…[3,28,31,68] In addition, metallic Ki ntercalates into the carbon lattice.S ubsequentr emoval of the intercalated Kc ompounds by washing produces enhanced microporosity. [3,28,31,68] Scheme2.Various strategies for the preparation of ACs from huminsu sed in the study. ChemSusChem 2018, 11,3599 -3608 www.chemsuschem.org 2018 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim…”

Section: Preparation Of Activated Carbon:a Ctivation Processmentioning

confidence: 99%

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Sustainable Utilization of Biomass Refinery Wastes for Accessing Activated Carbons and Supercapacitor Electrode Materials

et al. 2018

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Biomass processing wastes (humins) are anticipated to become a large-tonnage solid waste in the near future, owing to the accelerated development of renewable technologies based on utilization of carbohydrates. In this work, the utility of humins as a feedstock for the production of activated carbon by various methods (pyrolysis, physical and chemical activation, or combined approaches) was evaluated. The obtained activated carbons were tested as potential electrode materials for supercapacitor applications and demonstrated combined micro- and mesoporous structures with a good capacitance of 370 F g (at a current density of 0.5 A g ) and good cycling stability with a capacitance retention of 92 % after 10 000 charge/discharge cycles (at 10 A g in 6 m aqueous KOH electrolyte). The applicability of the developed activated carbon for practical usage as a supercapacitor electrode material was demonstrated by its successful utilization in symmetric two-electrode cells and by powering electric devices. These findings provide a new approach to deal with the problem of sustainable wastes utilization and to advance challenging energy storage applications.

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Section: Preparation Of Activated Carbon:a Ctivation Processmentioning

confidence: 99%

Section: Preparation Of Activated Carbon:a Ctivation Processmentioning

confidence: 99%

Section: Preparation Of Activated Carbon:a Ctivation Processmentioning

confidence: 99%

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Sustainable Utilization of Biomass Refinery Wastes for Accessing Activated Carbons and Supercapacitor Electrode Materials

et al. 2018

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“…It exhibits some desirable properties such as a large surface area, good ion exchange capacity, and high porosity, and has abundant oxygen functional groups and an aromatic surface . Recently, there have been various reports on the utilisation of BC for wastewater treatment and remediation of contaminated soil, owing to its cost‐effectiveness for the removal of chemical contaminants, namely, heavy metals and organic contaminants . There have also been several interesting proposals for the use of BC as a stabiliser of nano‐sized metal oxides which tend to aggregate because of their high surface energy and strong magnetic attraction, leading to reduced effective surface area and contact area when used for the removal of pollutants .…”

Section: Introductionmentioning

confidence: 99%

Titanium dioxide‐coated biochar composites as adsorptive and photocatalytic degradation materials for the removal of aqueous organic pollutants

Cai

Jiang

Liu

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND This article reports the synthesis and characterisation of titanium dioxide‐coated biochar composites (TBCs) by pyrolysing titanium dioxide‐treated biomass prepared by a modified sol–gel method. Their adsorptive and photocatalytic activities were evaluated based on the removal of safranine T (ST) from an aqueous solution with/without UV‐light irradiation. RESULTS Characterisation studies suggested that TiO2 was successfully loaded on the biochar substrate. The biochar and TiO2 contents of the composite significantly affected its performance. The ST removal capabilities of the TBCs with 1, 1.5, 2, and 2.5 g of the biomass are 1.7, 2.3, 7.2, and 2.3 times better than that of the raw biochar, respectively. Thus, the optimum amount of biomass in TBC‐x was determined to be 2 g, with the corresponding sample exhibiting excellent stability, effectiveness over a wide pH range, and a maximum ST removal capacity of 226.7 mg g‐1. CONCLUSION The loading of TiO2 significantly enhanced the adsorption performance of biochar and the high specific surface area of the biochar synergistically promoted the photocatalytic activity of TiO2. Both adsorption and photocatalytic degradation were confirmed to contribute to the decolourisation of the aqueous solution because of the removal of ST, with the effect of adsorption being slightly higher than that of photocatalysis. The synthesised composite is a promising alternative material for removing chemical contaminants. © 2017 Society of Chemical Industry

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“…Diverse biomasses for the production of activated carbon have been studied: beer lees waste [6], plane tree seeds [7], biochar [8], peanut shells [9], olive stones and walnut shells [10]. There are precedents for the use of biomass ashes in the construction industry, with different biomass ashes being studied for use in cement-based building materials [11]- [15].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Utilization of Charcoal and Ashes From Biomass-Energy Processes in Construction Materials

Quaranta¹,

Caligaris²,

Pelozo³

et al. 2017

WIT Transactions on Ecology and the Environment

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Biomass-energy processes are those used to obtain energy by the burning or biochemical converting of any organic matter to be used for fuel. In recent years, some materials used as a source for biomass energy have been obtained from the discards of agricultural activities. These include wood, sawdust, corn, sugarcane and rice husks, among others. The processes for converting biomass into energy are numerous. The most commonly used are combustion, co-firing process and pyrolysis. The residual endproducts obtained from these processes are highly dependent on the process conditions, especially temperature, pressure and atmosphere. Char and ashes are the most commonly obtained materials. The objective of this work is to analyse the feasibility of reusing these discards of biomass-energy processes, as additions in clay mixtures for the production of ceramic materials for civil construction. For this purpose, charcoal and ashes obtained from various biomasses have been characterized by SEM, EDS, DTA-TGA, XRD, etc. These results, and the determination of the theoretical sintering temperatures by the use of ternary diagrams, lead to the establishment of the feasibility of using these discards in current ceramic industry processes. Charcoal and ashes from sunflower husks, brewery waste and pine sawdust are the materials studied.

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Biochar as potential sustainable precursors for activated carbon production: Multiple applications in environmental protection and energy storage

Cited by 526 publications

References 97 publications

Sustainable Utilization of Biomass Refinery Wastes for Accessing Activated Carbons and Supercapacitor Electrode Materials

Sustainable Utilization of Biomass Refinery Wastes for Accessing Activated Carbons and Supercapacitor Electrode Materials

Titanium dioxide‐coated biochar composites as adsorptive and photocatalytic degradation materials for the removal of aqueous organic pollutants

Feasibility of Utilization of Charcoal and Ashes From Biomass-Energy Processes in Construction Materials

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