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Hydrogen adsorption capacity reduction of activated carbon produced from Indonesia low rank coal by pelletizing

机译：造粒降低印尼低品位煤制氢活性炭的氢吸附能力

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摘要

Coal-based activated carbon materials is a prospective materials for hydrogen storage application. The present work aimed to study the effect of post treatments including mechanical milling process and pelletization and simulating experimentally the conditions of pelletization of fine particles of activated coal. Post treatment of activated coal consist of 2 steps mechanical milling process in planetary ball mill followed by pelletization. First step of mechanical milling process gave particle size reduction and second step was undertaken to maintain activity of activated coal. Second step of mechanochemical process were done in dry (ACP-A) and wet condition (ACP-B) with the ratio of sample: KOH was 1:1 and performed for 1 h. Then they will be formed into pellets with the addition of binder which contained fructose, glucose and oligo. Some examinations such as PSA, BET, SEM and XRD were performed to determine the characteristics of activated carbon materials including hydrogen adsorption capacity testing. Particle size reduction of activated carbon reached 98.9% after planetary ball milling. The raw material of activated carbon (AC) has hydrogen adsorption as much as from 0.30 and 0.25 wt. % from -5 and 25oC measurements, respectively. As predicted the adsorption of hydrogen gas of pelletized activated carbon from bituminous coal decreased due to post treatment process about 47% for ACP-A and 60% for ACP-B at 4000 Bar.
机译：煤基活性炭材料是用于储氢应用的潜在材料。本工作旨在研究包括机械研磨过程和制粒的后处理的效果，并通过实验模拟活性煤细颗粒的制粒条件。活性炭的后处理包括两步，在行星式球磨机中进行机械研磨，然后进行制粒。机械研磨过程的第一步减小了粒径，第二步进行以保持活性煤的活性。机械化学过程的第二步在干燥（ACP-A）和湿润条件（ACP-B）下进行，样品：KOH的比例为1：1，并进行1小时。然后，将它们加入含有果糖，葡萄糖和寡核苷酸的粘合剂制成颗粒状。进行了一些检查，例如PSA，BET，SEM和XRD，以确定活性炭材料的特性，包括氢吸附能力测试。行星式球磨后，活性炭的粒度降低达到98.9％。活性炭（AC）原料的氢吸附量高达0.30至0.25 wt。分别来自-5和25oC测量的％。如所预测的，由于后处理过程，在4000 Bar下，ACP-A的吸附量约为47％，ACP-B的吸附量约为60％。

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