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Review Article

Recent Advances in Carbon-Based Adsorbents for Adsorptive Separation of Light Hydrocarbons

Table 2

Summary of selected carbonaceous adsorbents for CH4 purification.

Sample IDUptake (mmol g-1)Qst (kJ mmol-1)SelectivityRef.
CH4N2CO2CH4CO2SCH4/N2SCO2/CH4

PCNPsa1.170.2822.310d[77]
GOC-2a1.820.522.15.8e[78]
SC-6a1.860.624.95.7e[79]
PRC-850a1.120.38235.4d[80]
PSb1.380.453.633.115g[81]
GLb0.450.171.652.754g
OTS-1-550a1.120.32.82537.35.9e7.4g[82]
OTS-2-650a1.670.53.9624.733.85.2e4.1g
OTSS-3-350a0.90.262.8339.25.6e9.5i[83]
OTSS-2-450a0.930.32.94474.9e12.8i
CGUC-0.5-6a0.90.23.4316.7e34.9h[84]
CGUC-1-6a1.010.23.2627.55.9e16.9h
SNMC-1-600a1.450.53.9827.55.1e6.9h[74]
SNMC-2-600a1.570.54.2426.44.2e4.3h
SNMC-3-600a1.170.43.023.33.6e3.2h
Co-NDPC-500a1.00.263.527353.9f10.4e[85]
Co-NDPC-600a1.20.275.32853.84.4f11.4e
CC-PNPc2.203.715.9i[86]
P-CC-PNPc4.267.55.2i
C30-CC-PNPc7.0211.94.3i
C85-CC-PNPc5.358.94.8i
Chit_supCO2_P800a0.011.37137j[87]
Chit-PMO_P800a0.010.3030j
Chit-PMO_P800_crusheda0.141.017.2j
C1000a1.753.717.420.728e[88]
PHAa0.631.622.533.57.2e[89]
NAHA-1a1.653.752329.77e
NAHA-2a1.5423.5296e

Gas uptake at a298 K and 100 kPa, b313 K and 100 kPa, and c298 K and 20 bar. IAST predicted selectivity for separation of CH4/N2 with mole ratios of d30/70 and e50/50. fUptake ratio of CH4/N2 as separation selectivity. IAST predicted selectivity for separation of CO2/CH4 with mole ratios of g50/50, h40/60, and i10/90. jUptake ratio of CO2/CH4 as separation selectivity.