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<http://repository.upi.edu/id/eprint/108543> <http://purl.org/ontology/bibo/abstract> "Pemanfaatan biogas sebagai energi alternatif dalam mengurangi ketergantungan terhadap bahan bakar fosil sudah banyak dikembangkan. Namun, masih ada permasalahan yang harus diatasi salah satunya adalah kandungan  gas CO2  yang terdapat pada biogas sehingga  mempengaruh nilai kalor yang dihasilkan. Karbon aktif adalah salah satu jenis adsorben yang dapat digunakan untuk menghilangkan gas CO2. Karbon aktif yang digunakan dalam penelitian ini adalah jenis granular yang sudah beredar di pasaran. Dalam penelitian ini dikaji optimasi kinerja dari karbon aktif  dengan  variasi variabel penelitian berupa pemanasan dan massa karbon aktif. Metode yang digunakan untuk uji kinerja karbon aktif dilakukan secara kontinyu dengan menghitung jumlah gas CO2 yang teradsorpsi oleh karbon aktif dengan cara titrasi. Karakterisasi pada karbon aktif digunakan instrumen Scanning Electron Microscopy (SEM) dan spektroskopi FTIR. Berdasarkan hasil penelitian diperoleh data optimasi adsorpsi gas CO2 oleh karbon aktif sebesar 93,33% dengan massa karbon aktif 50 gram dan waktu kontak 50 detik. Karbon aktif yang paling baik dalam mengadsorpsi gas CO2 adalah karbon aktif dengan tanpa pemanasan, dengan jumlah adsorpsi gas CO2 rata-rata 41,88% selama 1.650 detik."^^<http://www.w3.org/2001/XMLSchema#string> .
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