植酸用于促进甲烷水合物形成

Application of Phytic Acid on Methane Hydrate Formation

水合物衍生技术实现工业化亟需解决的主要问题之一就是如何快速形成水合物。通过研究发现,植酸能促进甲烷水合物的形成。通过自行搭建的高压带搅拌可视反应釜进行水合物促进剂实验效果评价,发现在纯水体系中加入0.5 wt%的植酸后,能加快水合物形成过程,初始耗气速率由2.60×10-4 mol/min,提高至1.34×10-3 mol/min。储气量也相应增加。不仅如此,加入植酸,同样能促进甲烷在(柴油+水)体系水合物形成过程。在(20 vol%水+80 vol%柴油)体系中,未加入植酸时水合物形成过程中的速率为0.004 mol/min,加入0.5 wt%的植酸后,形成速率提高至0.008 mol/min,加入1.0 wt%的植酸后,形成速率提高至0.011 mol/min。此类水合物促进剂的开发,为新型气体水合物促进剂开发提供一个新的思路,可为水合物相关衍生技术的应用提供指导。

One of the most important problems for application on hydrate-based technology is the hydrate formation rate. Phytic acid was found to be a new promoter on methane hydrate formation. A high pressure autoclave with stirrer and visual window was used to evaluate the efficiency of the phytic acid. It was found that the initial methane consumed rate increase from 2.60×10-4 mol/min to 1.34×10.3mol/rain when 0.5 wt% of phytic acid was added in water. The methane storage capacity was also increase when 0.5 wt% of phytic acid was added in water. In the meanwhile, methane hydrate formation rate can be also accelerated in （diesel oil ＋ water） system. For （20 vol% water ＋ 80 vol% diesel oil）system, methane hydrate tbrmation rate is 0.004 mol/min without addition of phytic acid. Methane hydrate formation rate increased into 0.008 tool/rain when 0.5 wt% of phytic acid was added in（20 vol% water ＋ 80 vol% diesel oil） system, and Methane hydrate tbrmation rate increased into 0.011 mol/min when 1.0 wt% of phytic acid was added in（20 vol% water ＋ 80 vol% diesel oil）system. Application of phytic acid provides a new method to develop new kinds of hydrate promoters, which is also guidance for application of hydrate-based technology,