Hydrate technol. is a promising method for the separation and purification of low concentration coalbed methane (LCCBM).However, the separation efficiency and methane (CH4) recovery rate using the hydrate method are relatively low, which limits its practical application in productionTherefore, this study prepared two highly efficient promoters to enhance hydration and recover CH4 from LCCBM.The -SO-3 group, which is similar to the hydrophilic group of sodium dodecyl sulfate (SDS), was fixed on the surface of the graphene oxide layers (named -SO-3@GO), and the surface of carbon nanotubes was coated with the macromol. chain PSCS containing the -SO-3 group (named PSCS@CNTs).The exptl. results showed that in the presence of THF (THF), the hydration enhancement and CH4 recovery effects of -SO-3@GO and PSCS@CNTs were concentration dependent.When -SO-3@GO concentration was optimal at 0.75 g/L, the CH4 recovery and separation factor were 54.47 % and 3.91, resp.When PSCS@CNTs concentration was optimal at 0.15 g/L, the CH4 recovery and separation factor were 57.30 % and 4.23, resp.Meanwhile, -SO-3@GO and PSCS@CNTs have good cycling performance.After 6 repeated experiments, the CH4 recovery rate and separation factor of -SO-3@GO were only reduced by 4.99 % and 2.41 %, resp.The CH4 recovery of PSCS@CNTs was only reduced by 5.08 %, and the separation factor was almost unchanged.The -SO-3@GO and PSCS@CNTs developed in this study exhibit high CH4 recovery rate, high CH4 enhancement and good cycling performance, which have great potential in LCCBM recovery.