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合成了3种交联剂:柠檬酸铝、柠檬酸铬、A-C复合交联剂,利用傅立叶红外光谱、紫外光谱对它们进行了表征,并将其用于清水和处理后油田采出污水配制HPAM型聚合物弱凝胶的对比实验。实验表明:A-C复合交联剂用于油田采出污水配制的聚合物弱凝胶的成胶效果最优;当pH值为6、成胶温度为60℃、成胶时间为1 d时所配制的弱凝胶黏度最大,其黏度值达到1 129 mPa.s。随后考察了A-C复合交联剂浓度、成胶温度、矿化度、pH值、S2-及Fe2+等因素对A-C复合交联剂弱凝胶体系黏度的影响效果,结果表明:A-C复合交联剂基本上可用于油田处理后污水配制弱凝胶体系,有望实现油田处理后污水的资源化利用。 相似文献
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本文利用试验粒子方法研究了在考虑等离子体湍动的情况下带电粒子在准垂直激波中的加速, 在计算中, 我们采用组合模型来拟合等离子体湍动. 计算结果表明, 在存在等离子体湍动的情况下, 粒子可横越背景磁场运动, 从而被激波反射的上游粒子在到达下游后可被等离子体湍动散射回到上游, 并再次被激波反射并加速, 这样的过程可重复很多次, 因而粒子可被加速到很高的能量. 我们还研究了激波角, 粒子的初始能量和等离子体湍动的强度, 以及相干长度和两种湍动组分强度比与加速粒子的能谱之间的关系. 相似文献
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It is widely believed that magnetic reconnection plays an important role in various eruptive phenomena of space and astrophysical plasmas.The mechanism of anomalous resistivity,however,has been an open and unsolved problem.The chaos-induced resistivity proposed by Yoshida et al.is one of possible mechanisms for anomalous resistivity.By use of the test particle simulation,the present work studies the chaos-induced resistivity for different configurations of reconnection magnetic fields and its distribution in different chaos regions of reconnection current sheets.The results show that the chaos-induced resistivity can be 6-7 orders of magnitude higher than the classical Spitzer resistivity in the X-type chaos regions and 5 orders of magnitude in the O-type chaos regions.Moreover,in the X-type chaos regions the chaosinduced resistivity of the magnetized case is higher by a factor of 2 to 3 times than that of the unmagnetized case,but in the O-type chaos regions the chaos-induced resistivity of the magnetized case is close to or lower than that of the unmagnetized case.The present work is helpful to the understanding of the dynamics of reconnection current sheets,especially of the generation mechanism of the anomalous resistivity of collisionless reconnection regions. 相似文献
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