Search

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The potassium halide additive was added through kneading process to modify the activated coke. The scanning electron microscope and X-ray photoelectron spectroscopy were used to analyze the surface morphology, the kind of oxygen-containing functional groups and the relative content of oxygen-containing functional groups of the prepared activated coke. Using simulated flue gas, the mercury removal performance of the prepared activated coke samples was evaluated. The analysis found that the partial decomposition of potassium halide additive can improve the degree of activation, optimize the pore structure of the activated coke. Also, the potassium halide additive increases the relative content of the C—O functional groups in the activated coke. Compared with the blank sample of the activated coke, the relative content of the C—O functional groups in the three kinds of modified activated coke samples increase 13. 2%, 15. 2%, 15. 7% respectively. The mercury performance evaluation found that with the relative content of the C—O functional groups, the mercury removal performance of the activated coke is strengthened. Preparation of the modified activated coke by using potassium halide additive can effectively improve its mercury removal efficiency. [ABSTRACT FROM AUTHOR]

The experiments of desulfurization-regeneration (D-R) with commercial activated coke on a fixed-bed reactor in the simulated flue gas were conducted for ten cycles. The desulfurization capability of the activated coke was determined and calculated. Surface chemistry and morphology of the activated coke before and after regeneration were characterized by XPS (X-ray Photoelectron Spectroscopy) and SEM (Scanning Electronic Microscopy), respectively. Adsorption/desorption isotherm of nitrogen at 77 K of the activated coke was plotted, and thus the BET specific area and pore volume of the activated coke were obtained. Results show that with the proceeding of D-R cycle the BET specific area and pore volume of the activated coke are on a rising trend, increasing from 312.3 to 441.4 m2/g and from 0.147 9 to 0.203 0 cm3/g, respectively, meanwhile a gradual increase of oxygen content from 15.63% to 19.09% on surface of the activated coke can be observed; an unfavorable decrease of the desulfurization capability from 101.29 to 22.56 mg/g accompanied the increase of pore volume, BET specific area and surface oxygen content. During the first six D-R cycles there is an inverse relationship between the desulfurization capabilities and surface oxygen content on the surface of the activated coke. It is the enhancement of acidity of surface that inhabits SO2 chemisorptions on the active sites, which results in the progressive loss of desulfurization ability. [ABSTRACT FROM AUTHOR]