Browsing by Author "Suryawan, Bambang"

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    Adsorpsi Isosterik CO2 Bertekanan Tinggi Pada Karbon Aktif dengan Persamaan Model Tóth
    (wahyu sari yeni, 2019-07-01) Martin, Awaludin; Suryawan, Bambang; Alhamid, Muhammad Idrus; Nasruddin, Nasruddin
    High Pressure Adsorption Iisosteric CO2 on Activated Carbon by Tóth Equation Model. Adsorption Isostere Carbon dioxide (CO2) on Activated Carbon were found using Tóth equation model, cause the Tóth equation model have lower deviation value than Langmuir equation model. Adsorption isostere data will be use to predict the value of pressure and isotherm of temperature for adsorb the amount of CO2. In this research the maximum adsorption isostere CO2 on activated carbon is 35% from mass of activated carbon.
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    Adsorpsi Isotermal Co2 Bertekanan Tinggi Pada Karbon Aktif Dengan Metoda Volumetrik
    (wahyu sari yeni, 2019-07-01) Martin, Awaludin; Suryawan, Bambang; Alhamid, Muhammad Idrus; Nasruddin, Nasruddin
    Sistem adsorpsi adalah salah satu cara atau metoda yang paling efektif untuk memisahkan CO2 dengan zat lainnya yang dihasilkan dari pembakaran bahan bakar fosil. Pada rancangan untuk aplikasi tersebut, disamping data karakteristik material berpori (adsorben), data penyerapan CO2 pada adsorben (kinetik dan thermodinamika) juga dibutuhkan. Penelitian ini bertujuan menghasilkan data adsorpsi isotermal pada tekanan sampai dengan 3,5 MPa dengan menggunakan metoda tak langsung (metoda volumetrik) pada temperatur isotermal 300, 308, 318 dan 338 K. Adsorben yang digunakan adalah karbon aktif berbahan dasar batubara Kalimantan Timur yang diproduksi dengan menggunakan metode aktivasi fisika (CO2) derngan luas permukaan karbon aktif (karbon aktif KT) adalah 668 m2/g dan volume porinya 0,47 mL/g. Karbon dioksida (CO2) yang digunakan adalah karbon dioksida high purity dengan kemurnian 99,9%. Data yang diperoleh dari hasil eksperimen kemudian dikorelasi dengan menggunakan model persamaan Langmuir dan Toth. Hasil penelitian menunjukkan bahwa Kapasitas penyerapan maksimum adalah 0,314 kg/kg pada temperatur 300 K dan tekanan equilibrium 3384,69 kPa. Hasil regresi data eksperimen dengan menggunakan model Langmuir dan Toth adalah 3,4% dan 1,7%.
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    High-Pressure Adsorption Isotherms of Carbon Dioxide and Methane on Activated Carbon From Low-Grade Coal of Indonesia
    (wahyu sari yeni, 2019-07-01) Martin, Awaludin; Alhamid, Muhammad Idrus; Nasruddin, Nasruddin; Suryawan, Bambang; Loh, Wai Soong; Ismail, Azhar Bin; Chun, Wongee; Choon, Kim
    Adsorption isotherms data of methane and carbon dioxide gases on the activated carbons were measured experimentally using a volumetric method with pressure and temperatures ranging from 0 to 3.5 MPa and 27 to 65°C, respectively. Two types of activated carbons, namely, (1) Kalimantan Timur type activated carbon, which is lab-produced from Indonesian low-grade coal and (2) a commercial (Carbotech) activated carbon were used. The adsorption isotherms obtained were found to belong to type 1 of the International Union of Pure and Applied Chemistry classification. The adsorption uptakes for both carbon dioxide and methane on commercial activated carbon are higher than for the Kalimantan Timur activated carbon. This is due to higher Brunauer–Emmet–Teller surface area and pore volume of the former. Langmuir and Tóth isotherm models are correlated to predict the experimental data with acceptable accuracy.
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    Preparation of Activated Carbon by Physical Activation with Rotary Autoclave
    (wahyu sari yeni, 2019-07-01) Martin, Awaludin; Suryawan, Bambang; Alhamid, M. Idrus; Nasruddin, Nasruddin; Senoadi, Senoadi
    The aim of this research is to produce activated carbon from Indonesian coal with rotary autoclave and the rotation of rotary autoclave is ± 6 rpm. In this research, after fill in the raw material to autoclave, activated carbon were produced with following processes: carbonization; coal were pyrolysed at temperature 300oC for 6 hour with flowed of oxygen and physical activation; After carbonization process coal were pyrolysed at temperature 950oC for 6 hour and CO2 were flowed into autoclave as activating agent up to 300 ml/minute. Iodine Number is a quality parameter of activated carbon was done at laboratory. The result of this research is the iodine number of activated carbon with vertical autoclave is higher than rotary autoclave. The maximum iodine number with vertical autoclave is 589.1 mg/g and with rotary autoclave is 247.63 mg/g.