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首页> 美国卫生研究院文献>Bioengineered >Removal of hydrogen sulfide from biogas using activated carbon synthesized from different locally available biomass wastes - a case study from Palestine
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Removal of hydrogen sulfide from biogas using activated carbon synthesized from different locally available biomass wastes - a case study from Palestine

机译：使用从不同局部可用的生物量废物中合成的活性炭从沼气中除去硫化氢 - 巴勒斯坦的案例研究

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The main aim of this study was to remove hydrogen sulfide (H2S) from biogas by adsorption using synthesized activated carbon prepared using locally available biomass. The effect of the type of precursors, impregnation reagent and bed height was studied in continuous reactors. Three types of biomass wastes (almond shells, eucalyptus and coffee grains) were collected, grinded, sieved, pyrolyzed at 500°C and impregnated with chemical reagents such as potassium hydroxide or zinc chloride. Adsorption tests were performed using a fixed bed filter filled with the produced activated carbon. The highest biochar yield of 36% was obtained eucalyptus followed by almond shells (28.5%) and coffee grains (24%), respectively. The highest adsorption capacity and removal efficiency were obtained with eucalyptus followed by almond shells and coffee grains, respectively. For instance, eucalyptus showed an adsorption capacity of ~690 (mg hydrogen sulfide/g adsorbent) followed by almond (230 mg hydrogen sulfide/g adsorbent) and coffee grains (22 mg hydrogen sulfide/g adsorbent). As an impregnation reagent, potassium hydroxide gave the highest adsorption efficiency and capacity than zinc chloride. Furthermore, the breakthrough time with KOH (180 min) was higher than ZnCl2 (70 min). Increasing the bed height during continuous breakthrough tests increased the adsorption capacity and hydrogen sulfide removal efficiency. The results of this study showed that the adsorption efficiency of the synthesized activated carbon and consequently the hydrogen sulfide removal efficiency could be fine-tuned by selecting an appropriate biomass precursor and proper impregnation reagent.
机译：本研究的主要目的是通过使用局部可用生物质制备的合成活性炭来除去沼气中的硫化氢（H2S）。在连续反应器中研究了前体，浸渍试剂和床高度的类型的效果。收集三种类型的生物质废物（杏仁壳，桉树和咖啡粒），研磨，筛分，在500℃下热解，并浸渍有化学试剂，例如氢氧化钾或氯化锌。使用填充有产生的活性炭的固定床过滤器进行吸附试验。获得36％的最高生物炭产率为桉树，然后得到杏仁壳（28.5％）和咖啡颗粒（24％）。用桉树和杏仁壳和咖啡颗粒分别获得最高的吸附能力和去除效率。例如，桉树显示出〜690（Mg硫化氢/ G吸附剂）的吸附容量，然后是杏仁（230mg硫化氢/ G吸附剂）和咖啡颗粒（22mg硫化氢/ G吸附剂）。作为浸渍试剂，氢氧化钾具有比氯化锌的吸附效率最高。此外，KOH（180分钟）的突破时间高于ZnCl 2（70分钟）。在连续突破试验期间增加床高度增加了吸附能力和硫化氢去除效率。该研究的结果表明，通过选择合适的生物质前体和适当的浸渍试剂，可以微调硫化碳的吸附效率，从而通过选择合成的生物质前体和适当的浸渍试剂来进行微调。

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