Adsorption of CO2 onto Activated Carbons Prepared by Chemical Activation with Metallic Salts

Acevedo, Sergio; Giraldo, Liliana; Moreno–Piraján, Juan Carlos

doi:10.1515/ijcre-2017-0198

Cited by 3 publications

(2 citation statements)

References 22 publications

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“…A raw version of activated carbons obtained from African palm shell (Elaeis guineensis) was modified chemically by impregnation with salts of CaCl 2 (GC2), MgCl 2 (GM2), and Cu(NO 3 ) 2 (GCu2) at 2% wt / v in a thermostat bath at 358 K for 48 h. The carbonization of the samples was carried out in a CARBOLITE ® horizontal tubular furnace (Carbolite-Gero, Hope, UK) in CO 2 atmosphere (110 mL × min −1 ) with a 5 K × min −1 heating ramp for 6 h at 1173 K [38,39]. Subsequently, these were washed with HCl 5% and water to remove remain salts until the pH was constant.…”

Section: Methodsmentioning

confidence: 99%

Parabens Adsorption onto Activated Carbon: Relation with Chemical and Structural Properties

2019

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Parabens (alkyl-p-hidroxybenzoates) are antimicrobial preservatives used in personal care products, classified as an endocrine disruptor, so they are considered emerging contaminants. A raw version of activated carbons obtained from African palm shell (Elaeis guineensis) modified chemically by impregnation with salts of CaCl2 (GC2), MgCl2 (GM2) and Cu(NO3)2 (GCu2) at 2% wt/v and carbonized in CO2 atmosphere at 1173 K was prepared. The process of adsorption of methyl (MePB) and ethylparaben (EtPB) from aqueous solution on the activated carbons at 18 °C was studied and related to the interactions between the adsorbate and the adsorbent, which can be quantified through the determination of immersion enthalpies in aqueous solutions of corresponding paraben, showing the lowest-value carbon GM2, which has a surface area of 608 m2 × g−1, while the highest values correspond to the activated carbon GCu2, with a surface area of 896 m2 × g−1 and the highest content of surface acid sites (0.42 mmol × g−1), such as lactonic and phenolic compounds, which indicates that the adsorbate–adsorbent interactions are favored by the presence of these, with interaction enthalpies that vary between 5.72 and 51.95 J × g−1 for MePB adsorption and 1.24 and 52.38 J × g−1 for EtPB adsorption showing that the process is endothermic.

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Section: Methodsmentioning

confidence: 99%

Parabens Adsorption onto Activated Carbon: Relation with Chemical and Structural Properties

2019

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“…The process of activation generally leads to the formation of porous structures which can enhance the SSA. and property are largely influenced by the type of activators used like alkali, 149 metallic salts, 150 alkali metal carbonates, 151 and acids. 152 The role and comparison of different activators (i.e., CaCl 2 , ZnCl 2 and CuCl 2 ) for the preparation of porous carbon nanosphere were studied by Yu et al The methods of carbonization and activation were used for the synthesis of porous carbon nanospheres from the cellulose of corn straw.…”

Section: Cellulose and Lignin-derived Carbon For Batteriesmentioning

confidence: 99%

Review and Perspectives of Sustainable Lignin, Cellulose, and Lignocellulosic Carbon Special Structures for Energy Storage

et al. 2023

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Advancements to tackle the 21st-century energy crisis are being made focusing majorly on sustainability. Lignin and cellulose comprise major parts of biomass and have plenty of advantages such as abundance, eco-friendliness, cost effectiveness, sustainability, and renewability. Utilizing them as precursors for electrode materials for supercapacitors and batteries is promising. The present review discusses extensively the exploitation of tunable features of different special structures of carbons derived from components of lignin, cellulose, and lignocellulose, and their transformations as electrode materials for supercapacitors and battery applications. The structures have been categorized into carbon nanosheets, carbon nanofibers, hierarchically porous carbon, and heteroatom-doped carbon. Their performance studies with various electrochemical optimizations for energy storage have been discussed comprehensively with a significant emphasis on the structural morphologies of the discussed materials. As the materials also have some limitations, the review highlights a few gaps and challenges to be encountered for further developments with a future perspective in energy storage.

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A Review on the Removal of Carbamazepine from Aqueous Solution by Using Activated Carbon and Biochar

et al. 2021

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Carbamazepine (CBZ), one of the most used pharmaceuticals worldwide and a Contaminant of Emerging Concern, represents a potential risk for the environment and human health. Wastewater treatment plants (WWTPs) are a significant source of CBZ to the environment, polluting the whole water cycle. In this review, the CBZ presence and fate in the urban water cycle are addressed, with a focus on adsorption as a possible solution for its removal. Specifically, the scientific literature on CBZ removal by activated carbon and its possible substitute Biochar, is comprehensively scanned and summed up, in view of increasing the circularity in water treatments. CBZ adsorption onto activated carbon and biochar is analyzed considering several aspects, such as physicochemical characteristics of the adsorbents, operational conditions of the adsorption processes and adsorption kinetics and isotherms models. WWTPs usually show almost no removal of CBZ (even negative), whereas removal is witnessed in drinking water treatment plants through advanced treatments (even >90%). Among these, adsorption is considered one of the preferable methods, being economical and easier to operate. Adsorption capacity of CBZ is influenced by the characteristics of the adsorbent precursors, pyrolysis temperature and modification or activation processes. Among operational conditions, pH shows low influence on the process, as CBZ has no charge in most pH ranges. Differently, increasing temperature and rotational speed favor the adsorption of CBZ. The presence of other micro-contaminants and organic matter decreases the CBZ adsorption due to competition effects. These results, however, concern mainly laboratory-scale studies, hence, full-scale investigations are recommended to take into account the complexity of the real conditions.

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Adsorption of CO2 onto Activated Carbons Prepared by Chemical Activation with Metallic Salts

Cited by 3 publications

References 22 publications

Parabens Adsorption onto Activated Carbon: Relation with Chemical and Structural Properties

Parabens Adsorption onto Activated Carbon: Relation with Chemical and Structural Properties

Review and Perspectives of Sustainable Lignin, Cellulose, and Lignocellulosic Carbon Special Structures for Energy Storage

A Review on the Removal of Carbamazepine from Aqueous Solution by Using Activated Carbon and Biochar

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