PENGARUH PERBEDAAN SIFAT PENYANGGA ALUMINA TERHADAP SIFAT KATALIS HYDROTREATING BERBASIS NIKEL-MOLIBDENUM
<p><strong>EFFECT OF ALUMINA SUPPORT PROPERTIES ON THE NICKEL-MOLIBDENUM BASE HYDROTREATING CATALYST.</strong><em> Effect of surface characteristics of three species of synthesized γ-alumina (alumina-1, alumina-2 and alumina-3) on characteristics NiMo catalysts has been studi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Diponegoro University
2012-11-01
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| Series: | Reaktor |
| Subjects: | |
| Online Access: | http://ejournal.undip.ac.id/index.php/reaktor/article/view/6093 |
| Summary: | <p><strong>EFFECT OF ALUMINA SUPPORT PROPERTIES ON THE NICKEL-MOLIBDENUM BASE HYDROTREATING CATALYST.</strong><em> Effect of surface characteristics of three species of synthesized γ-alumina (alumina-1, alumina-2 and alumina-3) on characteristics NiMo catalysts has been studied. </em><em>Those aluminas </em><em>are </em><em>derived from boe</em><em>hmite </em><em>Ca</em><em>t</em><em>a</em><em>pa</em><em>l B by varying </em><em>rasio</em><em> mol </em><em>nitric acid to</em><em> </em><em>b</em><em>oehmite. </em><em>A</em><em> </em><em>s</em><em>ol-</em><em>g</em><em>el method </em><em>is used to synthesize γ-Al<sub>2</sub>O<sub>3</sub> support. The N</em><em>itrogen adsorption, X-ray diffraction (XRD), Temperature Programmed Reduction (TPR) of H<sub>2</sub>, Temperature Programmed Desorption (TPD) of NH<sub>3</sub>, and mechanical strength are used to characterize the supports and catalysts.</em><em> </em><em>The results showed that the surface area alumina affects the formation of crystalline MoO<sub>3</sub> in the NiMo catalyst, while </em><em>γ-Al<sub>2</sub>O<sub>3</sub></em><em>-3 support which has the highest surface area (about 195 m<sup>2</sup>/g) compared to the other two types of alumina (>195 m<sup>2</sup>/g) does not have a crystalline MoO<sub>3</sub>. The formation of crystalline MoO<sub>3</sub> is not influenced by the acidity alumina. Based on the results of XRD, it is indicated that the supported alumina-3 NiMo catalyst (having the highest acid strength) shows that there is no presence of crystalline MoO<sub>3</sub>. Pore size distribution of support did not change significantly after the deposition of Ni and Mo oxides. Mechanical strength of support also affects the strength NiMo catalyst. Support alumina-3 which has the highest mechanical strength gives the mechanical strength of the highest NiMo catalyst.</em></p><p> </p><p><em>Pengaruh sifat penyangga γ-alumina hasil pengembangan (alumina-1, alumina-2 dan alumina-3) pada karakter katalis hydrotreating nikel-molibdenum (NiMo) telah dipelajari. Ketiga jenis γ-alumina diturunkan dari boehmite “Catapal B” dengan menvariasikan nisbah mol asam nitrat terhadap boehmite. Pembuatan γ-alumina menggunakan metoda sol-gel. Adsorpsi Nitrogen, X-ray difraksi (XRD), Temperature Programmed Reduction (TPR) H<sub>2</sub>, </em><em>Temperature Programmed Desorption</em> <em>(TPD)</em> <em>NH<sub>3</sub></em><em>,</em> <em>dan kekuatan mekanik digunakan untuk mengkarakterisasi penyangga dan katalis. Hasil penelitian menunjukan bahwa luas permukaan alumina mempengaruhi pembentukan kristalin MoO<sub>3</sub> dalam katalis NiMo. Pada penyangga alumina-3 yang memiliki luas permukaan yang paling tinggi (sekitar 195 m<sup>2</sup>/g) di banding dua jenis alumina lainnya (>195 m<sup>2</sup>/g) tidak memiliki kristalin MoO<sub>3</sub>. Pembentukan kristalin MoO<sub>3</sub> tidak dipengaruhi oleh sifat keasaman alumina. Berdasarkan hasil XRD ditunjukan bahwa pada katalis NiMo berpenyangga alumina-3 (memiliki kekuatan asam yang paling tinggi) tidak terdapat adanya kristalin MoO<sub>3</sub>. Distribusi ukuran pori peyangga tidak berubah signifikan setelah deposisi oksida Ni dan Mo. Kekuatan mekanik penyangga mempengaruhi pula kekuatan katalis NiMo. Penyangga </em><em>γ Al<sub>2</sub>O<sub>3</sub>-3 yang memiliki kekuatan mekanik yang paling tinggi memberikan kekuatan mekanik katalis NiMo yang tertinggi. </em></p> |
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| ISSN: | 0852-0798 2407-5973 |