Oberflächenoxyde des Kohlenstoffs

Boehm, H. P.; Diehl, E.; Heck, Wolfgang; Sappok, R.

doi:10.1002/ange.19640761704

Cited by 186 publications

(41 citation statements)

References 35 publications

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“…Specific surface area, pore volume, and mean pore diameter were measured by a specific surface analyzer: NOVA4200e (Yuasa Ionic, Japan). The surface functional groups on the CT samples were measured using the method reported by Boehm et al [18,19]. The amount of pH solution added to the CT samples was measured by an activated carbon test method (JIS K1474).…”

Section: A Materialsmentioning

confidence: 99%

Properties of Carbonaceous Material Produced from Cotton and Its Dye Adsorption Capabilities

Ogata

Tominaga

Kangawa

et al. 2011

e-J. Surf. Sci. Nanotechnol.

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In this study, methylene blue (MB), orange II (ORII), and indigo carmine (IC) were used as adsorbates. Untreated (CT) and treated cotton (CT400, CT600, CT800, and CT1000) were prepared from waste cotton, and their respective physical (i.e., specific surface area, pore volume, and mean pore diameter) and chemical properties (i.e., yield percentage, base consumption, and amount of pH solution added to the adsorbent) were investigated. Scanning electron microscope images of CT, the adsorption rate, and the adsorption isotherm were also analyzed. The specific surface area, pore volume, and mean pore diameter of CT1000 was greater than that of other CT varieties, indicating that the pores on the CT surface were generated by carbonization. Additionally, yield percentage and base consumption decreased because of carbonization. Equilibrium adsorption (i.e., MB, ORII, and IC) was reached within 12 h. The experimental data were fitted to a pseudo-second-order model, suggesting that the adsorption might be a chemisorption process, for which the correlation coefficient, R, equals 1.000. The amount of dye adsorbed onto CT1000 was as follows: IC (290 mg/g) < MB (446 mg/g) ∼ ORII (452 mg/g). These experimental data were fitted to the Freundlich equation. The present study implies that the adsorbent for dye removal can be produced from waste cotton and that it is useful for the purification of dye solution systems.

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Section: A Materialsmentioning

confidence: 99%

Properties of Carbonaceous Material Produced from Cotton and Its Dye Adsorption Capabilities

Ogata

Tominaga

Kangawa

et al. 2011

e-J. Surf. Sci. Nanotechnol.

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“…Functionalization of carbon surfaces with S and N containing groups have been carried out by different methods such as: treatment with sulfur 17 and CS 2 18 at high temperatures, direct reaction of surface COOH groups with H 2 NR compounds 19 and direct surface deposition of pyrazolone derivatives 20 . However, these proposed methods show in general complex procedures with low efficiency.…”

Section: Carbon Surface Functionalizationmentioning

confidence: 99%

Tailoring activated carbon by surface chemical modification with O, S, and N containing molecules

et al. 2003

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In this work the surface of activated carbon was chemically modified in order to introduce O, S and N containing groups. The activated carbon surface was selectively oxidized with concentrated HNO 3 under controlled conditions. Characterization by thermogravimetric analyses, infrared spectroscopy and NaOH titration suggested the formation of mainly -COOH and small amounts of -OH groups, with concentration of approximately 4.10 21 groups/g of carbon. These -COOH functionalized carbons showed high adsorption capacity for metal cations in aqueous solution in the following order: Pb ]. These -COOH surf groups can be reacted with SOCl 2 to produce a surface acylchloride group, -COCl. This surface -COCl group proved to be a very reactive and versatile intermediate for the grafting of different S and N containing molecules onto the carbon surface, such as 1,2-ethaneditiol (EDT-, HSCH 2 CH 2 SH) 1,7-dimercapto-4-thioheptane (DMTH-HSCH 2 CH 2 CH 2 SCH 2 CH 2 CH 2 SH) or 1,2-ethylenediamine (EDA-NH 2 CH 2 CH 2 NH 2 ) and triethyltetraamine, TEA (H 2 NCH 2 CH 2 NHCH 2 CH 2 NHCH 2 CH 2 NH 2 ). The characterization of these materials was carried out by TG, IR and TPDMS (Temperature Programmed Decomposition Mass Spectrometry) experiments suggesting the formation of thioesther and amide surface groups, i.e. -COSR and -CONHR, with yields of approximately 50 and 75% for the reaction with DME and EDA, respectively. Preliminary adsorption experiments showed that these materials can efficiently remove metals such as Pb +2 , Cu +2 and Ni +2 from aqueous medium.

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“…Boehm et al, [1964] and Hofman et al [1950]). These studies have also shown that oxide groups on the surface of a carbon enhance the adsorption of ammonia.…”

Section: Analysis Of Ammonia Adsorption Isothermsmentioning

confidence: 99%

NOx CONTROL OPTIONS AND INTEGRATION FOR US COAL FIRED BOILERS

Bockelie¹,

Cremer²,

Davis³

et al. 2001

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This is the third Quarterly Technical Report for DOE Cooperative Agreement No: DE-FC26-00NT40753. The goal of the project is to develop cost effective analysis tools and techniques for demonstrating and evaluating low NOx control strategies and their possible impact on boiler performance for firing US coals. The Electric Power Research Institute (EPRI) is providing cofunding for this program. This program contains multiple tasks and good progress is being made on all fronts. A Rich Reagent Injection (RRI) design has been developed for a cyclone fired utility boiler in which a field test of RRI will be performed later this year. Initial evaluations of RRI for PC fired boilers have been performed. Calibration tests have been developed for a corrosion probe to monitor waterwall wastage. Preliminary tests have been performed for a soot model within a boiler simulation program. Shakedown tests have been completed for test equipment and procedures that will be used to measure soot generation in a pilot scale test furnace. In addition, an initial set of controlled experiments for ammonia adsorption onto fly ash in the presence of sulfur have been performed that indicates the sulfur does enhance ammonia uptake.

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Oberflächenoxyde des Kohlenstoffs

Cited by 186 publications

References 35 publications

Properties of Carbonaceous Material Produced from Cotton and Its Dye Adsorption Capabilities

Properties of Carbonaceous Material Produced from Cotton and Its Dye Adsorption Capabilities

Tailoring activated carbon by surface chemical modification with O, S, and N containing molecules

NOx CONTROL OPTIONS AND INTEGRATION FOR US COAL FIRED BOILERS

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