2017
DOI: 10.1016/j.ijhydene.2017.02.043
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Rice straw-based activated carbons doped with SiC for enhanced hydrogen adsorption

Abstract: Activated carbons (ACs) based on rice straw (RS) were synthesised using potassium carbonate as activating agent at three different K 2 CO 3 /RS weight ratios. Morphological, chemical, structural as well as textural characterisations were carried out in order to establish relationships between the physicochemical properties of the materials and their hydrogen adsorption capacities. The ACs contained potassium and silicon as the main impurities. Si was identified by XRD in both phases of silicon dioxide and sili… Show more

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Cited by 34 publications
(41 citation statements)
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References 50 publications
(38 reference statements)
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“…Q st,exc values between 4.5 and 9 kJ mol -1 were obtained. These values are in agreement with those obtained in our previous works [34,84], but are slightly higher than those commonly obtained for the adsorption of hydrogen on graphite [85][86][87]. Q st,exc was found to be almost constant in the range of n exc considered, which corresponds to a relatively low fractional filling.…”
Section: Isosteric Heat Of Adsorptionsupporting
confidence: 91%
“…Q st,exc values between 4.5 and 9 kJ mol -1 were obtained. These values are in agreement with those obtained in our previous works [34,84], but are slightly higher than those commonly obtained for the adsorption of hydrogen on graphite [85][86][87]. Q st,exc was found to be almost constant in the range of n exc considered, which corresponds to a relatively low fractional filling.…”
Section: Isosteric Heat Of Adsorptionsupporting
confidence: 91%
“…The amount of adsorbed CO 2 per surface area (μmol.m -2 ) is presented in Figure 2d versus the average micropore size. This methodology and representation have been already used by several authors 55,56 . Representing the adsorbed CO 2 per surface area versus A BET and L 0 DR,N2 , a good fit was also obtained (R 2 = 0.86, Figure S3) but the quality of the fit was far better when using S NLDFT and L 0, NLDFT (i.e., R 2 = 0.93) (Figure 2d).…”
Section: Influence Of Adsorption Potential and Porous Texture On Co 2mentioning
confidence: 99%
“…ACs are produced by physical or chemical activation of carbon precursors, which can be coals [11][12][13] , various pyrolized materials [14][15][16] , or biomass [17][18][19][20] . In any activation process, the ultimate goal is to increase the textural properties of the material (i.e., surface area and pore volume).…”
Section: Introductionmentioning
confidence: 99%
“…Owing to their special natural structure, while having silica as the main component, rice husk, rice straw, and wheat husk ash have the potential to be a starting material in the synthesis of silicon carbide and nitride ceramics. The preparation of SiC and SiC‐containing composites based on rice husk and rice straw is well known . However, there is only one report that explains the formation of SiC nanobelts, nanorods, nanotubes, and nanowires from wheat husk …”
Section: Wheat Husk Silica‐based Materialsmentioning
confidence: 99%
“…The preparation of SiC and SiC-containing composites based on rice husk and rice straw is well known. 80 However, there is only one report that explains the formation of SiC nanobelts, nanorods, nanotubes, and nanowires from wheat husk. 79…”
Section: Silicon Carbidementioning
confidence: 99%