Preparation of activated carbon from Canadian coals using a fixed-bed reactor and a spouted bed-kiln system

Dalai, Ajay K.; Zaman, Jasimuz; Hall, Eric S.; Tollefson, Eric L.

doi:10.1016/0016-2361(95)00228-6

Cited by 16 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, for the removal of small molecular organic substances (such as naphthalene, acenaphthene, and phenanthrene) from aqueous solution, iodine number as an index can indicate the performances of carbon better than specific surface area and amount of methylene blue sorption. This was also supported by the results of Dalai et al (1996) and Suzuki et al (2007). Moreover, the molecular length of phenanthrene (1.17 nm) is larger than 1 nm, so the correlation ( R 2 = 0.840) weakened.…”

Section: Resultssupporting

confidence: 69%

Removal of Polycyclic Aromatic Hydrocarbons from Aqueous Solution on Soybean Stalk–based Carbon

Kong

Gao

et al. 2011

J of Env Quality

View full text Add to dashboard Cite

Soybean [ (L.) Merr.] stalk-based carbons were prepared by phosphoric acid activation at different carbonization temperatures. Characteristics of the prepared carbon, including specific surface area, iodine number, and amount of methylene blue sorption, were determined. Experiments on phenanthrene, naphthalene, and acenaphthene, as representatives of polycyclic aromatic hydrocarbons (PAHs), removal from aqueous solution by the prepared carbon were conducted at different levels of carbon addition. The results indicated that the specific surface area, iodine number, and amount of methylene blue sorption increased with an increase of carbonization temperature. The maximum values were observed at 700°C and were 287.63 m g, 508.99 mg g, and 90.14 mg g, respectively. The removal efficiencies of phenanthrene, naphthalene, and acenaphthene tended to increase with increasing carbon amounts and carbonization temperature. The optimal removal performance was obtained under the experimental conditions of carbon concentrations of 0.04 g 32 mL and carbonization temperature of 700°C, and the removal efficiencies of phenanthrene, naphthalene, and acenaphthene were 99.89, 100, and 95.64%, respectively. The performance of the prepared carbon was superior to that of commercial activated carbon. Additionally, for the same carbon concentrations, the removal efficiency of PAHs on prepared carbons followed the order: phenanthrene > naphthalene > acenaphthene. Results obtained from this work provide some insight into the reuse of an agricultural residue, and also provide a new application for the treatment of PAHs in contaminated water utilizing activated carbon prepared from agricultural residues.

show abstract

Section: Resultssupporting

confidence: 69%

Removal of Polycyclic Aromatic Hydrocarbons from Aqueous Solution on Soybean Stalk–based Carbon

Kong

Gao

et al. 2011

J of Env Quality

View full text Add to dashboard Cite

show abstract

“…This caused enhancing weight loss of mulberry branches. Additionally, previous publications (Dalai et al, 1996;Suuberg and Aarna, 2007) indicated that both the pyrolysis/activation temperature and the burnoff rate had a significant effect on porous texture of products-namely, better porosity was usually obtained at higher temperature and burnoff rate, which corresponds with results shown in this study.…”

Section: Resultssupporting

confidence: 89%

Preparation of Mulberry Branch Biomass Char and Its Usage in Wastewater Treatment

Wu¹,

Wang²,

Zhang³

et al. 2012

Water Environment Research

View full text Add to dashboard Cite

Biomass char was prepared from mulberry branches by physical activation. An examination by Fourier transform infrared spectroscopy (FTIR) indicated that the functional groups of Si-O were mostly burnt out, significantly decreasing the ash content. Analysis of data from a scanning electron microscope (SEM) and a Brunauer-Emmett-Teller (BET) test also revealed increased surface roughness and pore structure, which improved the adsorption capacity of biomass char after preparation. The optimum conditions for preparation were found to be pyrolysis at 700 °C for 30 minutes, and then activation at 750 °C for one hour, with 3.4% steam content for the activating agent. The prepared biomass char was then employed to adsorb ammonium, copper(II) actetate [Cu(II)] and hexavalent chromium [Cr(VI)] in a solution. The results indicated that the prepared biomass char had a better adsorptive performance than the raw material. Moreover, the removal of determinands increased along with the dosage, and the highest adsorption efficiency of ammonium, copper(II) acetate [Cu(II)] and hexavalent chromium [Cr(VI)] were found to be 20%, 100% and 50%, respectively. The adsorptions of ammonium and hexavalent chromium [Cr(VI)] can be simulated by a pseudo-second order model, while the adsorption of copper(II) acetate [Cu(II)] is better simulated by a pseudofirst order model. The adsorption isotherms of copper(II) acetate [Cu(II)] by biomass char were also investigated, and the Langmuir isotherm was found to best describe the adsorption process. Water Environ. Res., 84, 2060Res., 84, (2012.

show abstract

“…MB molecule has been estimated that the minimum pore size it can enter is 1.3 nm [28] and can be used to indicate the capacity of a carbon for sorption of medium-sized molecules. The iodine molecule provides information about the surface area that is contributed by pores larger than 1 nm [29], and the iodine number provides a good indication of the capacity of a carbon for sorption of small molecules [30]. The average pore width of KOH-activated CAC was approximately 2.8 nm in Table 2, which was a sufficiently large pore width to allow MB and iodine molecules to pass through for a large amount of adsorption.…”

Section: Effects Of Activatormentioning

confidence: 99%

Preparation of activated carbon from Xinjiang region coal by microwave activation and its application in naphthalene, phenanthrene, and pyrene adsorption

Xiao

Liu

Yan

et al. 2015

Journal of the Taiwan Institute of Chemical Engineers

View full text Add to dashboard Cite

show abstract

Preparation of activated carbon from Canadian coals using a fixed-bed reactor and a spouted bed-kiln system

Cited by 16 publications

References 7 publications

Removal of Polycyclic Aromatic Hydrocarbons from Aqueous Solution on Soybean Stalk–based Carbon

Removal of Polycyclic Aromatic Hydrocarbons from Aqueous Solution on Soybean Stalk–based Carbon

Preparation of Mulberry Branch Biomass Char and Its Usage in Wastewater Treatment

Preparation of activated carbon from Xinjiang region coal by microwave activation and its application in naphthalene, phenanthrene, and pyrene adsorption

Contact Info

Product

Resources

About