天然气水合物抑制剂KDL的研究

Study on KDL inhibitor for natural gas hydrate

针对当前水合物抑制剂存在用量大、成本高等缺点,研制出一种新型水合物抑制剂。通过单因素法得到其最优合成条件为:单体质量分数为20%、单体摩尔比n(NVP)∶n DMDAAC)∶n(QJA)=1∶1∶1、引发剂V50质量分数为0.5%、反应体系pH=7、反应时间为6 h、反应温度为60℃。对合成抑制剂的研究结果表明,合成抑制剂对水合物抑制性能较好,优于传统水合物抑制剂PVP。20%的甲醇与水合物抑制剂复配,能够使四氢呋喃水溶液结晶温度降到-14.5℃。

Current hydrate inhibitors have the disadvantages such as large consumption amount and high cost.A new type of synthetic hydrate inhibitor is developed.The optimal synthesis conditions are obtained by single factor method as follows:monomer concentration is 20%,the ratio of n(NVP)∶n(DMDAAC)∶n(QJA)is 1∶1∶1,the initiator V50 is added in an amount of 0.5%,p H is 7,the reaction lasts for 6 h,and the reaction temperature remains at 60℃.It is found that the synthetic inhibitor exhibits better inhibition properties against hydrates and are superior to traditional hydrate inhibitor PVP.The compounding of 20%methanol with the inhibitor can reduce the crystallization temperature of the tetrahydrofuran aqueous solution to-14.5℃.