A zero-dimensional non-stationary model of a microwave discharge in liquid n-heptane at atmospheric pressure with continuous argon injection into the plasma region is presented. The model includes equations for the kinetics of neutral and charged plasma components, equations describing the formation and growth of solid particles from the decomposition products of n-heptane, and an equation for the microwave field strength in plasma. The description of the coagulation process takes into account the electrostatic repulsion of solid particles due to their charge. The kinetics of charged particles is described taking into account their death on the surface of negatively charged solid particles formed in plasma. To determine the coefficients of the reaction rates in mechanisms of direct electron impact, the electron energy distribution function obtained by solving the Boltzmann equation is used. Calculations have shown that the plasma quasineutrality is mainly supported by the charge of solid particles, and the electron concentration is 12 orders of magnitude less than the total ion concentration. An increase in the averaged microwave field was noted in comparison with the case that does not take into account charging. Charging of the solid particles does not affect the composition of the main gas-phase products, but leads to the suppression of the coagulation process for large solid particles, which leads to a change in the size distribution function of the solid particles formed in the plasma.

中文翻译：

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带电固体颗粒对其生长过程及液态正庚烷微波放电参数的影响

提出了在大气压下液体正庚烷中微波放电的零维非平稳模型，同时将氩气连续注入等离子体区域。该模型包括中性和带电等离子体成分的动力学方程、描述由正庚烷分解产物形成和生长的固体颗粒的方程，以及等离子体中微波场强的方程。凝结过程的描述考虑了固体颗粒由于其电荷而产生的静电排斥。描述带电粒子的动力学时考虑了它们在等离子体中形成的带负电的固体粒子表面的死亡。为了确定直接电子撞击机制中反应速率的系数，使用通过求解 Boltzmann 方程获得的电子能量分布函数。计算表明，等离子体准中性主要由固体粒子的电荷支持，电子浓度比总离子浓度小12数量级。与不考虑充电的情况相比，注意到平均微波场增加。固体颗粒带电不影响主要气相产物的组成，但会抑制大固体颗粒的凝聚过程，从而导致等离子体中形成的固体颗粒的尺寸分布函数发生变化. 电子浓度比总离子浓度小12个数量级。与不考虑充电的情况相比，注意到平均微波场增加。固体颗粒带电不影响主要气相产物的组成，但会抑制大固体颗粒的凝聚过程，从而导致等离子体中形成的固体颗粒的尺寸分布函数发生变化. 电子浓度比总离子浓度小12个数量级。与不考虑充电的情况相比，注意到平均微波场增加。固体颗粒带电不影响主要气相产物的组成，但会抑制大固体颗粒的凝聚过程，从而导致等离子体中形成的固体颗粒的尺寸分布函数发生变化.