IR spectroscopic study of Pt/Kl zeolites using adsorption of CO as a molecular probe

FTIR spectra of CO adsorbed on Pt/KL catalysts show that the relative band intensities and the total dispersion markedly depend on the catalyst preparation method (ion exchange, incipient wetness impregnation or co-impregnation with KCl). The CO stretching frequency of the dominant band for linear CO is shifted to higher wavenumbers, parallel with the proton concentration in the reduced catalyst, which is derived independently from the intensity of the IR bands of the OH groups. The results are in accordance with the model that electron-deficient platinum particles are platinum-proton adducts.On leave from: N.D. Zelinsky Institute of Organic Chemistry, Academy of Sciences, Moscow, USSR.     

天然高分子吸附剂研究Ⅱ．镍离子模板壳聚糖树脂的合成及特性

以镍离子为模板剂，合成了乙醇双环氧丙基醚交联的壳聚糖树脂，研究了其对Ｃｕ（Ⅱ）、Ｎｉ（Ⅱ）、Ｃｏ（Ⅱ）离子的吸附性能。结果表明，该法合成的树脂对Ｎｉ（Ⅱ）离子具有较强的“记忆”和“识别”能力，其对Ｃｕ（Ⅱ）、Ｎｉ（Ⅱ）、Ｃｏ（Ⅱ）的吸附量分别达２．２１、２．１３、１．４０ｍｍｏｌ／ｇ树脂。     

多层气敏薄膜表面吸附及界面扩散的研究

制备了ＳｎＯ３／ＺｎＯ及ＺｎＯ／ＳｎＯ３多层结构的气敏薄膜，用能谱结合氩离子刻蚀的方法及Ｘ射线衍射法，对薄膜的表面吸附。膜间的相互与组成等进行了研究，结果表明：薄膜表面存在少量的吸附多层膜中锌的扩散远比锡一个模型，对吸附现象作了初步的解释，讨论了造成锌锡扩散的原因。     

清洁汽油的研究与生产技术Ⅱ. 生产清洁汽油的非加氢精制技术进展

对国内外生产清洁汽油的非加氢精制技术，如异构化、烷基化、吸附脱硫、生物催化脱硫、碱性抽提脱硫等进行了综述．介绍了汽油清净剂及乙醇汽油的开发使用情况。针对国内清洁汽油生产技术现状，提出了增强自主创新能力，加快间接烷基化技术、催化裂化汽油吸附脱硫工艺及高选择性降硫助剂研发力度的建议。     

淮南矿区煤的甲烷吸附性研究

以淮南矿区Ｃ１３、Ｂ１１ｂ、Ｂ１０、Ｂ４ｂ和Ａ３煤为研究对象，从中精选出精煤、壳质暗煤、惰性暗煤及构造煤，采用重量法，分别测定它们的甲烷吸附量，研究煤的甲烷吸附性。     

N_2/Fe(100)相互作用的动力学研究

用准经典轨迹法对N2－Fe（100）系统进行了研究，分析了氮分子在Fe（100）面上的直接散射和离解性吸附等过程中的能量传递和重新分配，阐明了表面催化的机理。作为准经典轨迹法更为深入的应用，研究了主要LEPS势参数和势特性对初始离解吸附几率（S0）的影响，得出了S0随势特性变化的规律。     

SMF-425树脂吸附和解吸铼的研究

研究了SMF-425型阴离子交换树脂在弱酸体系中吸附、解吸铼的性能和机理，结果表明，[H^ ]在0.1～1.0mol/L范围内，对铼的吸附有利，吸附平衡服从Freundish吸附等温式，吸附反应吸热，温度越高越有利于吸附。每g干树脂对铼的静态和动态饱和吸附容量分别为169.31mg、175.43mg。用2mol/L硫氰酸铵作淋洗剂，流速为2mL/min时，淋洗效果较好，结果令人满意。     

铂与氢、水和苯分子相互作用的量子化学研究

采用量子化学程序Gaussian98(A.9)从头算的B3LYP方法，全优化计算铂对氢、水和苯的化学吸附作用，得到了3种相关络合物PtX、PtXX和Ptxxx(X=H，H2O或C6H6)的平衡几何构型和电子结构信息，并探讨了这些络合物的成键性质，以及苯环与铂原子之间的分子轨道作用性质。结果表明，苯环与铂原子之间有很强的成键作用，并随着游离氢原子和水分子的参与，作用强度有很大变化。苯分子吸附在金属铂上，它的芳香性得到不同程度的降低，苯环被活化，苯环与铂原子之间形成η^2型π键络合物；水参与作用后，苯环与铂原子之间形成σ络合物；氢和水同时参与作用后，苯环与铂原子之间仅有很弱的π轨道作用。     

Adsorption des acides humiques sur charbon active en poudre. Influence du triphosphate de sodiumAdsorption of humic acids onto powdered activated carbon. The influence of sodium triphosphate

The use of activated carbon beds for the removal of natural humic and fulvic substances found in water supplies, has recently received considerable attention in water treatment operation (Lee et al., 1980; Le Cloirec et al., 1983). Moreover, the use of carbon adsorption for the reduction of haloform precursors (Anderson et al., 1981) and trihalomethanes produced by chlorination process, has contributed to a comprehensive investigation of adsorption characteristics of natural organic compounds (McCreary and Snoeyink, 1981). Many recent works showed the influence of adsorption system characteristics, such as pH, salt type, salt concentration and ionic heterogeneity in multicomponent adsorption systems, on the removal efficiency of humic and fulvic substances by activated carbon (McCreary and Snoeyink, 1980; Randtke and Jepsen, 1982; Weber et al., 1983). The purpose of this study is to examine the effect of a main component of domestic detergents, sodium triphosphate (STP), on the adsorptive capacities of powdered activated carbon (PAC) for commercially supplied humic acids, at different pH values in distilled water. Also, the effect of STP concentration and pH on the adsorption affinity of the PAC for humic acids, is discussed in relation with electrokinetic properties of carbon particles (zeta potential measurements).A first batch equilibrium study (Figs 1 and 2), showed an effective enhancement of adsorption capacity for humic acids as a function of STP concentration, in a non buffered media (pH of distilled water, close to 5.0). For example, visible absorption analysis of humic acids indicates an increase of 93% (500 mg l^?1 PAC) and 133% (1000 mg l^?1 PAC) in the carbon adsorption efficiency for a STP concentration from 0.2 to 1.0mM. A second batch equilibrium study (Figs 3 and 4) led to adsorption isotherms for humic acids in distilled water, as a function of STP concentration and initial pH value of the non buffered multicomponent system. Freundlich isotherms showed an increase in the adsorption capacity of the PAC for humic acids, with a decrease in pH and an increase in STP concentration. However, the adsorption capacity for humic acids is quite reduced at high pH values in presence of STP, in comparison with results obtained with distilled water.Electrokinetic measurements on PAC suspensions (Fig. 5) indicates that both humic acids and STP induce a negative variation of the zeta potential of carbon particles. In such a binary system, the zeta potential is a linear function of the pH; the negative surface charge of the carbon increasing with an elevation of pH (Fig. 6). Therefore, it appears that some adsorption of triphosphate polyanion from solution could occur, contributing then to the apparent negative surface charge of PAC particles.It has been previously showed that the type of anion in sodium salts, had little effect on the enhancement of adsorptive capacities of activated carbon for humic substances (Lafrance and Mazet, 1985), due to Na⁺ ions. However, adsorption of TP anions on the carbon surface may produce a source of repulsive charges, unfavourable to the co-adsorption of humic acids as the pH of the binary system reach more basic conditions. The influence of possible electrostatic interactions between adsorbates at the carbon surface, on the adsorption efficiency for humic acids, could then be studied by zeta potential measurements of PAC particles during the adsorption process.     

氯化氢浸渍活性炭净化汞蒸气的研究

用氯化氢对吸附汞热气用的活性炭进行浸渍处理是一种新的偿试。用氯化氢浸渍后的活性炭，对汞的吸附效率和吸附容量与没有浸渍的活性炭相比，均有很大的提高，同时，与其它吸附汞用的浸渍剂相比，具有价格低，来源广的优点，对汞的吸附效率平均在９５％以上。