Superior performance of modified pitch-based adsorbents for cyclic methane storage

Generalised predictability in the synthesis of biocarbons as clean energy materials: targeted high performance CO2 and CH4 storage

“…65 All three compacted carbons exhibit remarkably high volumetric storage capacity (cm 3 (STP) cm −3 ) being, respectively, 235, 216 and 193 for CHCC2800, CHCC4700 and CHCC4800, at 35 bar. Such uptake at 35 bar is comparable or higher than has previously been reported for any porous carbon; 7,66–75 the best uptake to date is 222 cm 3 (STP) cm −3 for an activated carbon (ACDS4700) derived from air-carbonised date seed. 7 More generally, the uptake is comparable to the best MOFs reported so far even though the latter's (MOF's) values, which are calculated using crystallographic density, are known to be overestimated.…”

“…These volumetric uptake values, which are based on experimentally determined packing density, are by some margin the highest ever reported for any porous materials be they carbons or MOFs. [1][2][3][4][5][6][7]35,39,50,[57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75] For a clearer picture of the performance of the present carbons, Figure 10 shows how they compare with current benchmark MOFs, including HKUST-1, Ni-MOF-74 and PCN-14. [2][3][4]76,77 The performance of the current carbons is also compared (Supporting Table S4) in terms uptake (total volumetric and gravimetric, as g g -1 ) at 65, S4) that the present carbons outperform the monolithic mono HKUST-1 and related mono UiO-66_D, both of which are claimed to be the current MOF record holders for methane storage at 25 o C and pressure of up to 100 bar.…”

“…These volumetric uptake values, which are based on experimentally determined packing density, are by some margin the highest ever reported for any porous materials be they carbons or MOFs. [1][2][3][4][5][6][7]35,39,50,[57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75] For a clearer picture of the performance of the present carbons, Fig. 10 shows how they compare with current benchmark MOFs, including HKUST-1, Ni-MOF-74 and PCN-14.…”

Experimental and simulation study of the effect of surface functional groups decoration on CH4 and H2 storage capacity of microporous carbons

“…A linear relationship between the CH4 uptake capacity and porosity characteristics of microporous carbons was reported in the literature [44,52]. Our previous studies showed adsorbents with well-developed micropores and narrow mesopores, similar to the AC and AC-OX samples in this study, are favourable for CH4 storage application [22,25]. In (II), pressures between 10 and 20 bar, the CH4 storage capacity of the AC-OX-U series rises and becomes close to the CH4 uptake values for AC-U (10.89 mmol/g) and AC (10 mmol/g) samples.…”

“…A custom-built volumetric adsorption measurement apparatus was used for the analysis of CH4 and H2 uptake on the prepared adsorbents at 298 K and pressure up to 40 bar. We have described the details of this sorption measurement system, calibration method and measurement procedure in our previous studies [22,25] and briefly in the Supplementary Information.…”