102 research outputs found
Carbothermic reaction characteristics of Indonesian Lateritic Nickel Ore
No full textOrganized by School of Materials Engineering & Sustainable Engineering Research Cluster, 1st - 2nd December 2009 at Putra Brasmana Hotel, Kuala Perlis, Perlis.In Indonesia, oxide nickel ore in the form of lateritic ore resources occur at the amount of 16 % from total nickel lateritic ore resources in the world. This resource is very attractive not only from economically but also from technologically point of view. Therefore, some basic characteristics of Indonesian lateritic ore are investigated in this paper. The aim of this research is to understand some basic carbothermic reaction characteristics by using coal-A (anthracite) and charcoal (coconut shell) reductors. The reductors addition was 10, 13, 15, and 20 mass%. It was reduced at the temperature of 1250 °C for 2 hour. According the reaction, the recovery of Fe-Ni was comparable between coal-A and charcoal reductors at 80 and 75%, respectively. They tend to increase along with the increasing coal-A and charcoal reductor addition. The microstructure observation shows the presence of Fe-Ni alloy and slag, dominated by olivine and fayalite as products of the reaction
Penataan karawitan "Sekar Sumarah"
No full textPenataan karawitan "Sekar Sumarah"
Penyaji : Sri Hardjito, Ujian Penyajian Jur. Karawitan ISI Surakart
Hydrogen adsorption capacity reduction of activated carbon produced from Indonesia low rank coal by pelletizing
No full textCoal-based activated carbon materials is a prospective materials for hydrogen storage application. The present work
aimed to study the effect of post treatments including mechanical milling process and pelletization and simulating
experimentally the conditions of pelletization of fine particles of activated coal. Post treatment of activated coal consist
of 2 steps mechanical milling process in planetary ball mill followed by pelletization. First step of mechanical milling
process gave particle size reduction and second step was undertaken to maintain activity of activated coal. Second step
of mechanochemical process were done in dry (ACP-A) and wet condition (ACP-B) with the ratio of sample: KOH was
1:1 and performed for 1 h. Then they will be formed into pellets with the addition of binder which contained fructose,
glucose and oligo. Some examinations such as PSA, BET, SEM and XRD were performed to determine the characteristics of
activated carbon materials including hydrogen adsorption capacity testing. Particle size reduction of activated carbon
reached 98.9% after planetary ball milling. The raw material of activated carbon (AC) has hydrogen adsorption as much
as from 0.30 and 0.25 wt. % from -5 and 25o
C measurements, respectively. As predicted the adsorption of hydrogen gas
of pelletized activated carbon from bituminous coal decreased due to post treatment process about 47% for ACP-A and
60% for ACP-B at 4000 Bar
Petang di Taman Sebuah Analisis Struktur Dan Semiotik
No full textTugas akhir ini merupakan sebuah penulisan tentang
analisis struktur dan semiotik drama Petang di Taman karya
Iwan Simatupang. Di sini diutarakan latar belakang dan
pokok masalah yang menjadi sebab dilakukannya penelitian
ini, landasan teori dan metode pendekatan atas naskah, tujuan penelitian dan sistematika penyajian
Thermal Remediation of Dioxins Contaminated Soil and Fry Ash by Zone Combustion Process(ゾーン燃料プロセスによるダイオキシン類汚染土壌および飛灰の浄化)
Get PDFapplication/pdf博士学位論文の要旨及び審査結果の要旨 (Summary of Thesis(DR))371790 bytesT2H132014othe
Perbandingan Pembacaan Absorbansi Menggunakan Spectronic 20 D+ dan Spectrophotometer UV-Vis T 60U Dalam Penentuan Kadar Protein dengan Larutan Standar BSA
No full textTelah dilakukan uji perbandingan pada pembacaan Absorbansi dari penentuan kadar Protein menggunakan Spectronic 20 D+ dan spectrophotometer uv-vis T 60U pada panjang gelombang 600 nm. Penentuan kadar protein menurut metode lowry dilakukan dengan cara membuat larutan standar dengan berbagai tingkat konsentrasi, kemudian dari masing-masing konsentrasi tersebut diambil 1 mL dan ditambahkan larutan lowry B, kemudian dibiarkan selama 10 menit dan kemudian ditambahkan larutan lowry A untuk dibiarkan selama 20 menit lalu diukur absorbansinya pada panjang gelombang 600 nm. Hasil penelitian pengukuran absorbansi menggunakan spectronic 20D+ menunjukkan nilai R2 = 0,9927 sedangkan untuk Spectrophotometer uv-vis T 60U menunjukan nilai R2 = 0,9971. Hal ini dapat disimpulkan bahwa pengukuran absorbansi untuk kedua instrumen tidak berbeda secara signifikan.</jats:p
Pengaruh Penggunaan Urea Multinutrien Blok Terhadap Kecernaan Bahan Kering dan Bahan Organik Pakan Sapi Perah
Get PDFScreening of proteins based on macro-algae from West Java coast in Indonesian marine as a potential anti-aging agent
No full textHubungan antara tingkat stres dengan prestasi belajar pada siswa sekolah dasar yang memiliki kegiatan tambahan pelajaran
Get PDF- …
