KARAKTERISASI DAN POTENSI KATALIS KARBON AKTIF TERSULFONASI LIMBAH KAYU PADA REAKSI HIDROLISIS SEKAM PADI MENGGUNAKAN MICROWAVE
Abstract
Biomassa berlignoselulosa merupakan bahan baku berbagai produk yang menjanjikan untuk dikembangkan. Salah satu biomassa berlignoselulosa yaitu limbah yang didapatkan dari sisa penggergajian kayu untuk kepentingan industri, dapat dimanfaatkan sebagai bahan baku pembuatan karbon aktif yang berfungsi sebagai katalis. Pada penelitian ini, dilakukan proses pembuatan karbon aktif dari limbah campuran kayu kamper dan meranti melalui proses pirolisis suhu 500 °C yang dilanjutkan dengan proses sulfonasi menggunakan H2SO4 10N. Produk karbon aktif tersulfonasi (KA-SO3H) kemudian dikarakterisasi yang meliputi rendemen, kadar air, kadar abu, kadar zat terbang, karbon terikat, daya jerap iod sesuai SNI 06-3730-1995, keasaman menggunakan adsorpsi amonia, dan gugus fungsi menggunakan analisa FTIR. Selanjutnya karbon aktif tersulfonasi diuji aplikasinya pada reaksi hidrolisis sekam padi menggunakan microwave dengan variasi bobot sekam padi sebesar 2, 4, 6, 8, dan 10 g pada daya 400 dan 600 W selama 5, 7, dan 9 menit. Kadar glukosa filtrat hasil reaksi selanjutnya dianalisis menggunakan metode asam dinitrosalisilat (DNS). Kondisi optimum reaksi hidrolisis diperoleh pada penggunaan katalis karbon aktif tersulfonasi (daya 400 W, rasio sekam padi:katalis 1:8, serta waktu 9 menit) menghasilkan kadar glukosa sebesar 330,51 ppm dengan persen perolehan glukosa 61,97%, dan energi yang diperlukan sebesar 216 kJ.
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DOI: https://doi.org/10.20886/jphh.2019.37.2.67-80
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