Activation of water in the downstream of low-pressure ammonia plasma discharge

IF 1.3 Q3 ORTHOPEDICS

Plasma Research Express Pub Date : 2022-06-09 DOI:10.1088/2516-1067/ac777e

Vikas Rathore, Vyom Desai, N. Jamnapara, S. Nema

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引用次数: 7

Abstract

In the present work, we study the physicochemical changes that arise in water named plasma processed water (PPW) when it is exposed to the downstream low-pressure discharge of ammonia (NH3) gas. Optical emission spectroscopy and voltage-current characteristics of NH3 plasma are studied to identify species formed in NH3 plasma along with plasma characterization. A three-way full factorial design of experiment is performed to study the effect of process parameters named applied voltage, post-discharge gas-water interaction time, and NH3 gas pressure on physicochemical properties of PPW. The obtained results are analyzed using analysis of variance, standardized effect estimation, regression analysis, and response surfaces. The optimum values of these properties and PPW process parameters are estimated using MATLAB fmincon solver with experimental constraints. The emission spectrum of NH3 plasma showed strong intensity N2 + lines along with weak intensity N2, NH, and N+ lines. The obtained results showed the post-discharge gas-water interaction time and applied voltage had a significant impact on physicochemical properties and ammonium ions concentration in PPW. The obtained optimum value of voltage and time is 550 V and 15 min with given experimental constraints.

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低压氨等离子体放电下游水的活化

在本工作中，我们研究了被称为等离子体处理水（PPW）的水在暴露于氨（NH3）气体的下游低压排放时发生的物理化学变化。研究了NH3等离子体的光电发射光谱和电压-电流特性，以识别NH3等离子体中形成的物种以及等离子体特性。采用三元全因子实验设计，研究了外加电压、放电后气水相互作用时间和NH3气体压力等工艺参数对PPW物理化学性能的影响。使用方差分析、标准化效应估计、回归分析和响应面对获得的结果进行分析。在实验约束下，使用MATLAB fmincon求解器估计了这些特性和PPW工艺参数的最佳值。NH3等离子体的发射光谱显示出强强度的N2+线以及弱强度的N2、NH和N+线。结果表明，放电后的气水相互作用时间和外加电压对PPW的物理化学性质和铵离子浓度有显著影响。在给定的实验约束下，获得的电压和时间的最佳值为550V和15min。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plasma Research Express Energy-Nuclear Energy and Engineering

CiteScore

2.60

自引率

0.00%

发文量