[en] In order to accelerate the regeneration, steam and easily desorlable substances are first removed at 100⁰C from the activated carbon. This is followed by treatment with one or several solvents such as a mixture of, e.g., N- methyl-2-pyrrolidone (NMP) and triethanol amine (TEA) or 2-pyrrolidone, NMP and TEA. These solvents can then be blown out by inert gases at high temperatures of 200⁰C, at which the solvents do not decompose. (DG)

[en] The absorbing capacity of activated carbon can be considerably improved upon by heating in an inert atmosphere to 50-300⁰C and then quenching to below -66⁰C. The method is explained in 18 examples. The quenching takes place by cooling with indirect heat exchange on the wall of a cooling chamber, the treated coal thus maintains its hardness and does not break. (UWI)

No abstract available

[en] Activated carbon is produced from carbonaceous source materials by a complex physicochemical process. It is extensively used as a high adsorptive product for purification, deodorization, and decolorization in the chemical industry and in drinking water treatment plants. In 2017, the global activated carbon market accounted for $4 billion and is expected to reach $14.21 billion by 2026.

[en] There are two reasons for measurement of radon concentration. On one hand, it causes grave health hazards to not only uranium miners but also people living in normal houses and buildings. On the other hand it helps in mineral exploration, earthquake prediction, study of volcanic activities, and search for geothermal energy sources. In this paper we have investigated possibilities of radon detection using passive detectors based on domestic industry activated charcoal and their relative detection efficiency is determined in comparison to commercial EPA detector. Also, minimum detectable activity for measuring radon is determined, effect on water gain, exposure time and counting efficiency. (author)

[en] This invention relates to a rechargeable particulate filter for adsorption of radioactive contamination from a nuclear containment structure in the event of a nuclear power plant design basis or loss of coolant accident. More particularly, this invention relates to a rechargeable charcoal filter which permits loading and unloading of the particulate granules while limiting exposure of personnel to radioactivity. The present invention could also be utilized in heating and air conditioning systems. (author)

[en] We propose a recycling system that can recover the useful water from the spent water soluble coolant by using a surfactant and powdered activated carbon. The processing of about 70 liters of actual spent water soluble coolant yielded about 60 liters of clear water with 6.7 of pH and 0.0 of Brix value. About 120 liters of recycle water-soluble coolant was prepared by diluting an emulsion type cutting fluid 20 times with the recycle water. The recycle coolant has been showing the very similar Brix value and pH changes as those of virgin coolant until 100 days usage. The recycle coolant also showed the same potential to inhibit the progress of flank wear as that of virgin coolant. These facts indicate that the recycled water can be utilized as a dilutor of renewal water-soluble coolant

[en] This invention relates to a rechargeable gasketless charcoal filter which can adsorb radioactive constituents, especially iodine and methyl iodide, at an efficiency of better than 99.9% even should a design basis or loss of coolant accident occur

[en] The bibliography contains worldwide citations pertaining to the uses of activated charcoal in industry as well as in the laboratory, including its use in air pollution, chemical adsorption, radioactive waste adsorption, electrochemistry, industrial waste treatment, and the mining industry

[en] N-Alkyl imidazoles have been prepared by sonochemical irradiation of imidazole and 1-bromobutane using alkaline promoted carbons. Under the experimental conditions, N-alkyl imidazoles can be prepared with a high activity and selectivity. It is observed that imidazole conversion increases in parallel with increasing basicity of the catalyst. For comparison, the alkylation of imidazole has also been performed in a batch reactor system under thermal activation