Theoretical and experimental perspectives in utilizing nanobubbles as inhibitors of corrosion and scale in geothermal power plant
Theoretical and experimental perspectives in utilizing nanobubbles as inhibitors of corrosion and scale in geothermal power plant
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DOI：
10.1016/j.rser.2021.111373
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发表时间：
2021-10
影响因子：
15.9
通讯作者：
A. Kioka;M. Nakagawa
中科院分区：
文献类型：
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作者：
A. Kioka;M. Nakagawa
腐蚀和结垢给地热发电的可靠性和经济性带来了严峻的技术挑战。由于必须处理大量地热水来获取热量，许多传统的化学抑制剂在经济上不可行。此外，大多数化学抑制剂价格昂贵，并且很容易改变流体化学性质，从而产生不需要的产物。纳米气泡具有环境友好、价格低廉、使用方便等优点，利用其独特的理化性质，得到了广泛的应用。在这里，我们建议纳米气泡可以用作地热系统中的腐蚀和结垢抑制剂。首先，本文回顾了目前地热发电系统中使用的腐蚀和结垢缓解方法，其次，从理论和实验角度概述了纳米气泡作为腐蚀和结垢抑制剂的新用途。我们认为，与常用的化学产品相比，纳米气泡可以是强大的、化学性质温和、环境友好且廉价的腐蚀和结垢抑制剂。纳米气泡作为抑制剂的作用机制及其抑制效果随地热流体化学条件的不同而变化。
Corrosion and scaling have presented serious technical challenges to make geothermal power reliable and affordable. Due to the large quantities of geothermal water that must be processed to obtain heat, many conventional chemical inhibitors are not economically viable. Moreover, most chemical inhibitors are costly and can readily change the fluid chemistry that results in generating undesired products. Nanobubbles are environment-friendly, inexpensive, and easy-to-use, and thus have been used in a broad area of applications by taking advantage of their unique physicochemical properties. Here we propose that nanobubbles can be used as inhibitors of corrosion and scaling in the geothermal system. First, this paper reviews the mitigation methods for corrosion and scale currently used in a geothermal power system, and second, provides an overview on the novel use of nanobubbles as inhibitors of corrosion and scale from theoretical and experimental perspectives. We suggest that nanobubbles can be powerful, chemically benign, environment-friendly, and inexpensive inhibitors of corrosion and scaling, compared with the chemical products commonly used. The mechanisms on how nanobubbles act as inhibitors and their inhibition effectiveness vary with different chemical conditions of geothermal fluid.