21 research outputs found

    三次采油用烷基苯磺酸盐弱碱体系的研究

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    通过对抚顺洗涤剂化学厂的烷基苯进行切割处理,合成了平均烷基碳链长度为C14、C17、C20、C23,的烷基苯磺酸钠。经过复配,在弱碱(Na2CO3)条件下研究了大庆三厂油/水的界面张力、稳定性和驱油效率。结果表明:以平均烷基碳链长度在17左右的烷基苯磺酸盐为主剂进行复配后,得到的样品可以在弱碱条件下,使大庆三厂的油/水界面张力在较宽的碱质量分数w(Na2CO3)=0.2%~0.8%及表面活性剂质量分数w(表面活性剂):0.025%-0.2%条件下维持在超低水平(10^-3mN/m),并能保持长期稳定,驱油效率比水驱提高20%以上

    三次采油用烷基苯磺酸盐弱碱体系的研究

    No full text
    通过对抚顺洗涤剂化学厂的烷基苯进行切割处理,合成了平均烷基碳链长度为C14、C17、C20、C23,的烷基苯磺酸钠。经过复配,在弱碱(Na2CO3)条件下研究了大庆三厂油/水的界面张力、稳定性和驱油效率。结果表明:以平均烷基碳链长度在17左右的烷基苯磺酸盐为主剂进行复配后,得到的样品可以在弱碱条件下,使大庆三厂的油/水界面张力在较宽的碱质量分数w(Na2CO3)=0.2%~0.8%及表面活性剂质量分数w(表面活性剂):0.025%-0.2%条件下维持在超低水平(10^-3mN/m),并能保持长期稳定,驱油效率比水驱提高20%以上

    三次采油用烷基苯磺酸盐弱碱体系的研究

    No full text
    通过对抚顺洗涤剂化学厂的烷基苯进行切割处理,合成了平均烷基碳链长度为C14、C17、C20、C23,的烷基苯磺酸钠。经过复配,在弱碱(Na2CO3)条件下研究了大庆三厂油/水的界面张力、稳定性和驱油效率。结果表明:以平均烷基碳链长度在17左右的烷基苯磺酸盐为主剂进行复配后,得到的样品可以在弱碱条件下,使大庆三厂的油/水界面张力在较宽的碱质量分数w(Na2CO3)=0.2%~0.8%及表面活性剂质量分数w(表面活性剂):0.025%-0.2%条件下维持在超低水平(10^-3mN/m),并能保持长期稳定,驱油效率比水驱提高20%以上

    铬酸钠碳化生产重铬酸钠工艺的热力学模拟研究

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    铬酸钠碳化生产重铬酸钠工艺是高压反应,且泄压后会发生强烈的逆反应,因此实际反应过程的机理及受控条件的影响状况难以用实验来测定。OLI使用非常先进的热力学和数学模型来预测化学体系平衡过程的性质,并且利用OLI预测电解质溶液热力学已成为工业预测标准。本文应用OLI-Analyzer对铬酸钠碳化生产重铬酸钠工艺进行了热力学模拟,包括一次碳化、二次碳化、碳酸氢钠分离以及碳酸氢钠湿法分解。探索压力、温度、浓度等因素对碳化工艺各平衡过程的影响。从热力学的角度确定了各平衡过程的最佳条件,为实际工业应用提供指导意义。经过模拟得出各平衡过程的最佳条件为:(1)一次碳化:温度为40℃,压力为1MPa,铬酸钠初始浓度10mol/kg;(2)二次碳化:温度为40℃,压力为1MPa,预碳化率66.7%;(3)碳化液中碳酸氢钠分离:温度为40℃,压力为1MPa,铬酸钠初始浓度10mol/kg;(4)碳酸氢钠湿法分解:温度为7℃,压力为0.001MPa,此时分解率98.89%

    铬酸钠碳化生产重铬酸钠工艺的热力学模拟研究

    No full text
    铬酸钠碳化生产重铬酸钠工艺是高压反应,且泄压后会发生强烈的逆反应,因此实际反应过程的机理及受控条件的影响状况难以用实验来测定。OLI使用非常先进的热力学和数学模型来预测化学体系平衡过程的性质,并且利用OLI预测电解质溶液热力学已成为工业预测标准。本文应用OLI-Analyzer对铬酸钠碳化生产重铬酸钠工艺进行了热力学模拟,包括一次碳化、二次碳化、碳酸氢钠分离以及碳酸氢钠湿法分解。探索压力、温度、浓度等因素对碳化工艺各平衡过程的影响。从热力学的角度确定了各平衡过程的最佳条件,为实际工业应用提供指导意义。经过模拟得出各平衡过程的最佳条件为:(1)一次碳化:温度为40℃,压力为1MPa,铬酸钠初始浓度10mol/kg;(2)二次碳化:温度为40℃,压力为1MPa,预碳化率66.7%;(3)碳化液中碳酸氢钠分离:温度为40℃,压力为1MPa,铬酸钠初始浓度10mol/kg;(4)碳酸氢钠湿法分解:温度为7℃,压力为0.001MPa,此时分解率98.89%

    铬酸钠碳化生产重铬酸钠工艺的热力学模拟研究

    No full text
    铬酸钠碳化生产重铬酸钠工艺是高压反应,且泄压后会发生强烈的逆反应,因此实际反应过程的机理及受控条件的影响状况难以用实验来测定。OLI使用非常先进的热力学和数学模型来预测化学体系平衡过程的性质,并且利用OLI预测电解质溶液热力学已成为工业预测标准。本文应用OLI-Analyzer对铬酸钠碳化生产重铬酸钠工艺进行了热力学模拟,包括一次碳化、二次碳化、碳酸氢钠分离以及碳酸氢钠湿法分解。探索压力、温度、浓度等因素对碳化工艺各平衡过程的影响。从热力学的角度确定了各平衡过程的最佳条件,为实际工业应用提供指导意义。经过模拟得出各平衡过程的最佳条件为:(1)一次碳化:温度为40℃,压力为1MPa,铬酸钠初始浓度10mol/kg;(2)二次碳化:温度为40℃,压力为1MPa,预碳化率66.7%;(3)碳化液中碳酸氢钠分离:温度为40℃,压力为1MPa,铬酸钠初始浓度10mol/kg;(4)碳酸氢钠湿法分解:温度为7℃,压力为0.001MPa,此时分解率98.89%

    Effects of simulated precipitation changes on plant community characteristics of wetland in the Yellow River Delta, China

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    Under the changing climate scenario, changes in precipitation regimes are expected to alter soil water and salinity conditions, with consequences on the characteristics of plant community in estuarine wetland. Here, we used a six-year (2015-2020) precipitation manipulation experiment to examine how plant community characteristics responded to precipitation changes in the Yellow River Delta. The results showed that soil electrical conductivity significantly decreased, while soil moisture significantly increased with increasing precipitation. Precipitation changes altered plant community composition. Increased precipitation reduced the absolute dominance of Suaeda glauca and Suaeda salsa, but increased that of Triarrhena sacchariflora and Imperata cylindrica. Shannon index and Margalef richness index of plant community significantly increased with increasing precipitation. Compared with the control, both decreased and increased precipitation decreased the plant community abundance, frequency and coverage. The treatment of 60% increased precipitation significantly decreased plant community frequency by 54.9%, while the 60% decreased precipitation, 40% decreased precipitation, 40% increased precipitation and 60% increased precipitation treatment significantly decreased plant abundance by 38.9%, 33.8%, 35.8% and 45.7%, respectively. The aboveground biomass significantly increased with increasing precipitation, but aboveground plant biomass under 60% increased precipitation treatment being lower than that reducing under 40% increased precipitation treatment, probably due to the negative effects of flooding stress. In addition, Margalef richness index had a significantly positive relationship with aboveground biomass. Aboveground biomass, Shannon diversity index, Margalef richness index, and Simpson diversity index were negatively related to soil electrical conductivity, and aboveground plant biomass was positively related to soil moisture. Our results revealed that precipitation changes regulate growth characteristics, species composition, and diversity of plant community by altering soil water and salinity conditions in a coastal wetland

    垂直及傾斜復水管に関する研究

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    種別: 実験報告指導教官:丹羽教

    玉米自交系P9-10遗传转化体系的建立

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