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Enrichment Process of Biogas Using Simultaneous Absorption - Adsorption Methods

机译：使用同时吸收 - 吸附方法对沼气的富集过程 - 吸附方法

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Removal of CO2 in biogas is an essential methods to the purification and upgrading of biogas. Natural Clinoptilolite zeolites were evaluated as sorbents for purification of biogas that produced from palm oil mill effluent (POME) by anerobic-digestion method. The absorption and adsorption experiments were conducted in a fixed-bed two column adsorption unit by simultaneous absorption-adsorption method. The Ca(OH)2 solution with concentration of 0.062 M was used as absorption method. Sorbent for removal of CO2 in biogas have been prepared by modifying of Clinoptilolite zeolites with an acid (HC1, 2M) and alkaline (NaOH, 2M), calcined at 450°C and then coated using chitosan (0.5 w/v%) in order to increase their adsorption capacity. The removal of CO2 in biogas was achieved about -83% using 2.5 g of sorbent zeolite (2M)/chitosan dosage for each column, breakthrough time of 30 min, and flow rate of 100 mL/min. Clinoptilolite zeolites with modifications of an acid-alkaline and chitosan (zeolite (2M)/chitosan) are promising sorbents due to the amine groups from chitosan and high surface-volume ratio are one of important factors in a simultaneous absorption-adsorption method.
机译：去除沼气中的二氧化碳是纯化和升级沼气的必要方法。通过胆碱消化方法评价天然曲硫石沸石作为吸附剂作为吸附剂，用于纯化由棕榈油磨流出物（Pome）产生的沼气。通过同时吸收吸附法在固定床两列吸附单元中进行吸收和吸附实验。浓度为0.062μm的Ca（OH）2溶液用作吸收法。通过在450℃下煅烧的酸（HCl，2M）和碱（NaOH，2M）改性胰蛋白石沸石，在450℃下煅烧，然后使用壳聚糖（0.5W / v％）涂覆的胰酸钠（NaOH，2M）来制备用于去除沼气中的CO 2的吸附剂。增加吸附能力。使用2.5g吸附剂沸石（2M）/壳聚糖剂量为每柱，30分钟的突破时间和100ml / min的流速达到约-83％的沼气中的CO 2。由于来自壳聚糖的胺基，高表体积比是同时吸收吸附法的重要因素，具有酸性碱和壳聚糖（沸石（沸石（2M）/壳聚糖）的曲石沸石是有前途的吸附剂，是同时吸收吸附方法的重要因素之一。

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