In order to choose one elixir from three anti-scaling inhibitors A, B and C that most suits for the circulating cooling water in thermal power plants under certain water condition, we used the dynamic simulation test method in this paper. Under high concentration rate (4.0), we comprehensively analyzed the three elixirs from the factors of their anti-scaling, corrosion and economical performances. According to the results, it was confirmed that elixir B displayed the relevant good properties for the water condition of the power plant. Meantime, the elixir components of the three elixirs were analyzed, and the results showed that all the indexes of them were in conformity with the national standards.
Phase pure Li4Ti5O12/C composite was synthesized by sol-gel method using lithium acetate CH3COOLi•2H2O and tetrabutyl titanate [Ti(OC4H9)4] as starting materials, oxalic acid as chelating agent and sucrose as an additional carbon source. The as-prepared samples were characterized by means of TG-DTA, XRD and SEM. The electrochemical properties were investigated in terms of constant-current charge/discharge cycling and high-rate dischargeability. SEM analysis indicated that the prepared Li4Ti5O12/C composite using sucrose and oxalic acid as carbon source showed a spongy nano-particle aggregate structure, with average nano-particle size of 80-100 nm. Electrochemical results showed that the Li4Ti5O12/C composite prepared in the presence of sucrose exhibited better electrochemical performance with specific discharge capacities of 204.7, 171.6, 155.3 and 154.6 mAh/g at 0.2C, 1C, 2C, and 5C rates, respectively. And the discharge capacity could still reach 143.9mAh/g after 80 cycles at 1C rate, exhibiting excellent cycling performance.
Phase pure Li4Ti5O12/C composite was synthesized by solid-state method using Li2CO3and anatase TiO2as starting materials, and glucose, citric acid and oxalic acid as carbon sources, respectively. The effects of different carbon sources and various glucose amounts on the microstructure and electrochemical properties were systematically investigated. The as-prepared samples were characterized by means of XRD, SEM and particle size analysis. The electrochemical properties were investigated in terms of constant-current charge/discharge cycling tests. The results showed that the Li4Ti5O12/C composite with 2wt% glucose exhibited the optimal electrochemical performance with a specific discharge capacity of 190.8mAh/g at 0.2C rate. The discharge capacity could still reach 151.0mAh/g after 80 cycles at 1C rate, exhibiting excellent cycling performance.
In this paper, we made the nano-TiO2/glass composite electrode through the sol-gel method by using tetrabutyl titanate and anhydrous alcohol as the raw materials and the ITO conductive glass as the carrier. With the help of the photoelectric catalytic effect of TiO2 and the strong oxidation of Na2S2O8 as well as the computer application technology, we decomposed rapidly of the organophosphorous compounds and detected the total phosphorous (TP) on-line accurately. And then we characterized the TiO2 particles by SEM and analyzed the factors which influenced the decomposition and detection of TP by this method. The results show that the optimum experimental conditions of this method should be as follow: the concentration of Na2S2O8 is 0.03mol/L, UV illuminating time is 10 min, electrode voltage is 8V and the pH value should be in the alkaline zone. At last, it is validated the method is reliable and accurate for the decomposition of the organophosphorous by the recovery experiments and the comparative experiments between this method and national standard method.
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