Optimization of hydrogen storage at ambient temperature via central composite design using hybrid nanocomposites of zeolitic imidazolate frameworks-8 incorporated rice husk graphene-like as adsorbent

IF 3 4区工程技术 Q3 CHEMISTRY, PHYSICAL

Adsorption Pub Date : 2024-12-04 DOI:10.1007/s10450-024-00561-9

N. F. T. Arifin, N. Yusof, M. R. Adam, M. A. B. Pauzan, N. A. H. M. Nordin, A. F. Ismail, F. Aziz, J. Jaafar, W. N. W. Salleh, S. Chelliapan

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Abstract

Surface area and porosity are the main factors that affect hydrogen storage at room temperature. However, there are several external factors such as pressure of gas, reaction time and the amount of sample used during the process that might affect the performance of the hybrid nanocomposites towards hydrogen storage. In this study, central composite design (CCD) for response surface methodology (RSM) was used in determining the optimum conditions namely mass of sample (A), pressure of hydrogen gas (B) and reaction time (C) towards the hydrogen storage at room temperature. Rice husk derived graphene-like material (GRHC) was added into zeolitic imidazolate frameworks-8 (ZIF-8) to form a hybrid nanocomposite of ZIF-8/GRHC (ZGK) via in-situ synthesis. Due to synergistic effect, the surface area of ZGK (1065.51 m²/g) shows a great enhancement as 0.04 g GRHC was introduced as compared to pristine ZIF-8 (687.32 m²/g). On the other hand, the thermal stability of ZGK improved significantly as it can withstand up to 1000 ºC as compared to pristine GRHC and ZIF-8 respectively. Due to superior physicochemical properties of ZGK, it was chosen to undergo optimization of hydrogen storage at room temperature. From the confirmatory test which was run for three times, the optimum hydrogen storage at room temperature in ZGK was 1.95 wt.% when 0.50 g of ZGK was used; 15 bar of hydrogen gas was applied and the reaction time was 60 min as per suggested from the CCD.

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以稻壳类石墨烯为吸附剂的咪唑酸骨架-8杂化纳米复合材料为中心设计优化室温储氢性能

比表面积和孔隙率是影响室温储氢的主要因素。然而，有几个外部因素，如气体压力、反应时间和过程中使用的样品量，可能会影响混合纳米复合材料的储氢性能。本研究采用响应面法（RSM）的中心复合设计（CCD）确定了室温下储氢的最佳条件，即样品质量(A)、氢气压力(B)和反应时间(C)。将稻壳衍生的类石墨烯材料（GRHC）加入到沸石咪唑酸骨架-8 （ZIF-8）中，原位合成了ZIF-8/GRHC （ZGK）杂化纳米复合材料。由于协同效应，ZGK的表面积（1065.51 m2/g）在加入0.04 g GRHC后比原始ZIF-8的表面积（687.32 m2/g）显著增加。另一方面，ZGK的热稳定性显著提高，与原始GRHC和ZIF-8相比，ZGK可以承受高达1000ºC的高温。由于ZGK优异的物理化学性质，选择ZGK进行室温储氢优化。经3次验证试验，当ZGK用量为0.50 g时，室温下ZGK的最佳储氢量为1.95 wt.%；根据CCD的建议，加入15 bar氢气，反应时间为60 min。图形抽象

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来源期刊

Adsorption 工程技术-工程：化工

CiteScore

8.10

自引率

3.00%

发文量

审稿时长

2.4 months

期刊介绍： The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news. Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design. Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.