Papers by Keyword: RH

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Authors: Ling Jun Zhu, Wen Wen guo, Hai Xia Wang
Abstract: CO hydrogenation on carbon nanotubes (CNTs) supported Rh catalysts were conducted in a fixed bed reactor. The effect of reaction temperature, pressure and Mn additive on the catalytic performance was studied. The results revealed that temperature influent CO conversion and products selectivity significantly, while the effect of pressure was slightly. The temperature of 300 to 320 °C and a high pressure facilitate to synthesize ethanol with high efficiency. The highest ethanol and alcohol space time yield can be obtained on CNTs supported Rh catalyst containing 1.1% Mn.
Authors: Liang Chen
Abstract: Sulfur is a kind of harmful element in steel, and it is beneficial to molten steel to reduce the content of sulfur. On the basis of research, suitable desulfurizing agent and process parameters were chosen. The results of industrial test show that the average desulfurization efficiency is as high as 30%. In addition, there is a good result of T[O]&[N] control as well. With this testing program, the total content of FeO and MnO in ladle slag is bellow 12%, and it is beneficial to desulfurization. Increasing the content of CaO in desulfurization is conducive to desulfurization. On the other hand, There exists a serious problem in the test, and it is the erosion of RH immersion tubes, bottom of vacuum chamber, and refractory of ladle lining. In order to avoid or decrease this problem, basic refractory must be chosen.
Authors: Hui Xu, Lan Jie Zhao, Guo Hong Tong, Yi Qing Cui, Tian Lai Li
Abstract: Five greenhouses with different typical wall configurations were studied, including the hollow brick wall (HB), clay brick wall composed of mural column (MCCB), wall composed of fly ash air block brick (FAABB), clay brick wall composed of plum small hole column (PSHCCB), common clay brick wall with Styrofoam wall outside (SCB) to find out the effects of the north walls on the greenhouse microclimate. The interior temperature and RH environment, as well as the heating rate, cooling rate and the correlation with the outside temperature, were tested and compared, finding that the greenhouse with FAABB exhibits the optimal temperature and RH environment, and also the highest thermal stability. The findings may provide references for greenhouse construction and insulation measures.
Authors: Hideki Hosoda, M. Tsuji, Y. Takahashi, Tomonari Inamura, Kenji Wakashima, Yoko Yamabe-Mitarai, Shuichi Miyazaki, Kanryu Inoue
Authors: Xin Gang Ai, Sheng Li Li, Ning Wang, Nan Lv
Abstract: In this paper the influence of snorkel length and snorkel inner diameter and lifting gas flow rate on inclusion removal rate are discussed. It is found that inclusion removal rate varies greatly with snorkel length and snorkel inner diameter. Prolonging the snorkel length is benefited for inclusions removal in RH and inclusion remove time is enhanced, but inclusion remove rate is decreased when snorkel inner diameter is reduced. There is a best lifting gas flow rate for inclusion removal.
Authors: Xing Song Cao, Dong Wei Cao, Yi Fei Wu, Xio Qiang Yang, Shi Xiong Liu
Abstract: In order to comparatively study the effect of warm mix modifiers on the road performance of guss asphalt, the guss asphalt mixtures, whose asphalt aggregate ratio were 8.5%,9.0%,9.5% respectively, were mixed with 0%,1%,2%,3% of the RH and Sasobit warm mix modifiers. Then by means of Lueer test, penetration test, wheel track test and low-temperature bending test, the performance of guss asphalt were evaluated. The test results show that: RH and Sasobit can effectively improve the workability of guss asphalt; RH is better than Sasobit in reducing viscosity of guss asphalt; RH reduces the high-temperature properties of guss asphalt; On the contrary, Sasobit can improve the hightemperature performance of guss asphalt; RH and Sasobit have an adverse impact on the crack resistance of guss asphalt in low temperature, so their content should not too high. Guss asphalt has characteristics of high construction temperature and energy consumption. In order to reduce construction temperature, based on energy conservation, low-carbon emission environment, reduce the aging of asphalt principle, warm modifiers could be used to reduce the viscosity of guss asphalt at high temperatures[1-5]. Sasobit modifiers imported from Germany are used much more to improve the workability of guss asphalt. In this paper, 0%, 1%, 2%, 3% RH and Sasobit warm mix modifier were mixed with the aggregate ratio of 8.5%, 9.0%, and 9.5% of the Guss asphalt to compare and analyzed the performance of those two warm modifiers on Guss asphalt.
Authors: Sheng Li Li, Xin Gang Ai, Ning Wang, Nan Lv
Abstract: A water model of 1/4 linear scale for 210t RH has been established. RH circulation flow rate is measured by a velocimeter. The influences of lifting gas flow rate, snorkel inner diameter, injection depth and nozzle inner diameter on circulation rate were discussed. The dimension correlation has been calculated for the prediction of circulation rate. The results showed that the formula of circulation rate is 5.434×10-6G0.356·D1.254·d -0.106·H 0.821. The best nozzles inner diameter in terms of circulation rate was 3mm.
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