The dynamic adsorption of benzene vapor on the ACF activated by phosphoric acid

The dynamic adsorption behaviors of benzene vapor on phosphoric acid‐activated carbon fiber (ACF‐P) were investigated by gas chromatography. The experimental results showed that ACF‐P that was activated at >350^°C, like steam‐activated carbon fiber (ACF‐W), has good dynamic adsorption properties for benzene vapor. However, the saturation adsorption capacities of ACF‐P and ACF‐W are different. The dynamic adsorption conditions apparently do not affect the effluent concentration before the breakthrough point, but do change the operation loading and usage efficiency. The adsorbed ACF‐P can be regenerated, and good dynamic adsorbability can be recovered by heating treatment. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 1841–1847, 2002     

富氢气氛中CO的选择性氧化——碱金属助剂对Pt/γ-Al2O3催化剂性能的影响

研究了碱金属助剂对Pt/γ-Al₂O₃催化剂选择性氧化富氢气氛中CO性能的影响。结果表明，碱金属助剂的引入对Pt/γ-Al₂O₃的催化性能有不同程度的改变，其中添加Na和K后，能明显提高低温下的CO转化率。     

The effect of protein binding on ibuprofen adsorption to activated carbons

The potential of a range of polymer-based activated carbons to remove a non-steroidal anti-inflammatory drug ibuprofen from protein containing and protein-free solutions was studied. The adsorption capacity of five activated carbons produced from phenol-formaldehyde resin precursors (MAST Carbon Ltd) was compared to a cellulose coated activated carbon Norit RBX used in a commercial Adsorba^®300C haemoperfusion column (Gambro).Ibuprofen adsorption was studied in batch experiments over 24 h at pH=7.6 and 25 °C and adsorption equilibrium data were correlated with the Langmuir and Freundlich equations.Results showed that uncoated mesoporous MAST carbons can remove ibuprofen from model solutions both in the presence and absence of serum albumin. Ibuprofen is a highly protein-bound drug and the presence of serum albumin significantly affects the adsorption of ibuprofen by cellulose-coated microporous carbon used in Adsorba^®300C column.     

Lead recovery from aqueous environment by using porous carbon of citrus fruits waste: equilibrium,kinetics and thermodynamic studies

ABSTRACT

The mixture of citrus fruits (orange, grapefruit, mandarin, and lemon) wastes was utilized to obtain high surface area activated carbon (AC) by H₃PO₄ activation. The production conditions were optimized and the optimum conditions were determined. The optimal-activated carbon (CFWAC) was characterized by various physicochemical techniques. CFWAC was also used as a sorbent for Pb (II) ions from water. Batch experiments were performed to explore the adsorption capacity and mechanism. The Langmuir isotherm and pseudo-second-order kinetic model showed good fitness to the experimental data. The maximum Pb (II) adsorption capacity of CFWAC was found to be 163.93 mg/g.     

Influence of volatile matter and deposited carbon on coke yield from coals

The relations between coke yields and the volatile matter content of 30 individual and 30 blended coals were investigated. Coke yields and deposited carbon related to volatile matter content can be expressed in the following equations: CY (%) = 97.89?0.86 VMch+VMc; and DC (%)= ?2.24+0.16 VMch; where: CY=real coke yield; VMch = volatile matter content of charging coal; VMc=volatile matter content of coke, and in the case of <2%; DC = deposited carbon. The test results show excellent correlation with practice.     

由二氧化碳出发合成有机碳酸酯

对以二氧化碳为原料合成有机碳酸酯的环氧路线、酯交换和直接合成方法作了综合评述 ,认为直接合成是最佳的合成路线。碳酸酯的直接合成可在均相及多相催化体系中进行 ,负载金属、金属甲氧基化合物及碱均可作为催化剂。直接法研究的关键在于高性能催化剂的开发、由二氧化碳对金属 -氧键插入反应导致的催化循环的构筑及耦合反应的应用。     

活性炭吸附法处理麦麸膳食纤维废水的研究

采用活性炭吸附的方法来处理麦麸膳食纤维废水。实验结果表明,当活性炭的投入量为160 g/L,接触时间为20 m in,温度为55℃,pH值在小于5的条件下能有效处理该废水,CODC r的去除率最高达96.89%,BOD5的去除率最高达96.61%。     

High resolution XPS characterization of chemical functionalised MWCNTs and SWCNTs

High resolution XPS analysis of chemical functionalised multi-wall carbon nanotubes (MWCNTs) and single wall carbon nanotubes (SWCNT) was done with ESCA300 (overall instrument resolution of 0.35 eV). Information to the degree of functionalisation was ascertained by argon ion bombardment of the samples followed by XPS analysis to detect the functional groups, the percentage atomic concentration of various elements present and whether or not the detected functional groups imposed a chemical shift on the CNT atoms. The results show that true chemical functionalisation was achieved and by argon ion bombardment these functional groups can be altered relative to the C 1s carbon atoms of the CNT. The choice of chemicals used for functionalisation, the techniques employed and the types of nanotubes treated are important factors in chemical characterisation. The carbon atom on the nanotube ring to which the functional group (atom) is bonded, the chirality of the CNT, the electronegativity of the functional group, the bond type and whether the CNT is single-wall or multi-wall, or cut (short) could play a role in determining the chemical shift on the CNTs atoms. These investigations are relevant to chemical functionalisation of carbon nanotubes for various applications for example DNA sensors and other biomedical sensors.     

纳米碳酸钙/炭黑并用对丁苯橡胶性能的影响

研究了纳米碳酸钙／N330炭黑并用比对丁苯橡胶性能的影响。结果表明，随着CaCO3／N330并用比的改变，材料的强度有了显著的提高，特别是CaCOa／N330并用比为20／30(质量份)时复合材料的拉伸强度达到了20MPa以上，同时材料具有较好的弹性和较低的硬度；两种处理剂相比，树脂酸处理的碳酸钙具有较好的性能；表面处理的纳米炭酸钙与炭黑并用，可以降低炭黑填充橡胶的动态滞后，表面处理的纳米碳酸钙的加工性能比纳米炭黑好，可以通过并用纳米碳酸钙来改善炭黑胶料的加工性能。