Abstract

In this study, possibilities of increasing the efficiency of electrothermal regeneration of the granular BPL carbon were evaluated. The adsorbent was used to purification of propan-2-ol (IPA)-laden air streams with specified concentrations ranging from 2 to 11 g/m³. The experiments were carried out in the fixed beds containing either a single layer of BPL 4 × 6 carbon or a double layer of BPL 4 × 6 and BPL 6 × 16 carbons (volume ratio 9:1). The adsorbent bed was placed between two pyramid-shaped electrodes and was regenerated using direct resistance heating method. The regeneration measurements were carried out in the following parameter range: voltage 14–19 V, temperature set point 403 K, and nitrogen flow rate 0.06 m³/h. Electrical resistance of the double-layer bed was lower than the single layer due to the larger contact area between the fine BPL carbon particles and the upper electrode. This caused an increase in desorption degree by ca. 4% and a decrease in total energy consumption by 10%. The use of thermal insulation of the double-layer bed resulted in increasing the process energy efficiency. The regeneration was more energy efficient with a higher initial IPA content in the regenerated bed.

Graphic abstract

中文翻译：

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BPL活性炭的电热再生：提高工艺效率的可能性

摘要

在这项研究中，评估了提高粒状BPL碳电热再生效率的可能性。该吸附剂用于纯化载有2至11 g / m ^3的指定浓度的丙-2-醇（IPA）的空气流。实验在包含单层BPL 4×6碳或双层BPL 4×6和BPL 6×16碳（体积比9：1）的固定床中进行。将吸附剂床放置在两个金字塔形电极之间，并使用直接电阻加热方法对其进行再生。再生测量在以下参数范围内进行：电压14–19 V，温度设定点403 K和氮气流量0.06 m ³/H。双层床的电阻比单层低，这是因为细BPL碳颗粒和上电极之间的接触面积更大。这导致解吸度增加了约3％。4％，总能耗降低10％。双层床的绝热的使用导致了过程能量效率的提高。在再生床中，初始IPA含量较高，再生效率更高。

图形摘要