The　recovery　of　CH4　from　coalbed　gas　(CBG)　is　significant　for　improving　energy　utilization　and　mitigating　the　greenhouse　effect.　In　this　study,　CH4　was　separated　from　CBG　by　forming　sII　hydrate　with　5.56　mol　%　1,3-dioxolane　(DIOX)　solution　assisted　by　an　eco-friendly　promoter　sodium　lauroyl　glutamate　(SLG).　The　effects　of　SLG　concentration,　initial　pressure　and　temperature,　stirring　rate,　and　CBG　composition　were　systematically　investigated.　The　results　revealed　that　the　addition　of　SLG　notably　diminished　the　hydrate　induction　time　and　reaction　durations.　The　presence　of　500　ppm　of　SLG　decreased　the　CH4　concentration　to　15.50　mol　%　from　the　initial　30.23　mol　%,　and　the　CH4　recovery　and　separation　factor　reached　81.70%　and　3.34,　respectively.　Comparative　analyses　with　other　eco-friendly　surfactants　highlighted　the　substantial　advantages　of　SLG.　The　CH4　concentration　in　the　residual　gas　first　decreased　and　then　increased　with　the　augmentation　of　the　initial　pressure,　temperature,　and　stirring　rate.　An　inverse　pattern　was　observed　in　the　variations　of　CH4　recovery　and　separation　factor.　This　indicated　that　there　existed　an　optimal　initial　pressure,　temperature,　and　stirring　rate　for　CBG　separation.　The　CH4　content　in　the　hydrate　was　increased　to　91.59%　after　a　fourth-stage　enrichment,　meeting　the　standards　for　the　direct　injection　of　CBG　into　natural　gas　pipelines.　These　findings　provide　valuable　insights　for　CH4　separation　from　CBG　by　forming　sII　hydrate　with　eco-friendly　promoters.　©　2025　American　Chemical　Society.