Kinetika Proses Ekstraksi Katalis Bekas Ni/γ–Al2O3 dengan Pelarut Asam Sulfat: Model Shrinking Core dan Model Lump

Penulis

  • Elsha Pamida Bahri Universitas Katolik Parahyangan, Bandung, Indonesia
  • Ivanna Crecentia Narulita Simanungkalit Universitas Katolik Parahyangan, Bandung, Indonesia
  • Ratna Frida Susanti Universitas Katolik Parahyangan, Bandung, Indonesia
  • Gelar Panji Gemilar PT. Petrokimia Gresik, Gresik, Indonesia
  • Widi Astuti Balai Penelitian Teknologi Mineral, Badan Riset dan Inovasi Nasional, Tanjung Bintang, Indonesia
  • Himawan Tri Bayu Murti Petrus Universitas Gadjah Mada, Yogyakarta, Indonesia
  • Kevin Cleary Wanta Universitas Katolik Parahyangan, Bandung, Indonesia

DOI:

https://doi.org/10.23887/jstundiksha.v12i3.46264

Kata Kunci:

ekstraksi, katalis bekas, kinetika, model lump, model shrinking core

Abstrak

Tahapan scale–up dari suatu proses kimia, kinetika atau mekanisme dari proses tersebut perlu untuk dipelajari. Hal ini dilakukan untuk meminimalkan kesalahan dalam tahap perancangan suatu alat proses. Studi kali ini bertujuan untuk mengevaluasi model matematika yang dapat menggambarkan fenomena riil dari proses ekstraksi katalis bekas Ni/γ–Al2O3 dengan menggunakan pelarut asam sulfat (H2SO4). Studi ini melibatkan dua tahapan utama, yaitu tahap pengambilan data eksperimen dan tahap simulasi model matematika terhadap data eksperimen. Data untuk studi kinetika diperoleh melalui eksperimen proses ekstraksi dalam kondisi atmosferis di mana temperatur operasi divariasikan pada 30, 60, dan 85oC. Larutan asam sulfat yang digunakan memiliki konsentrasi 1 M, sedangkan ukuran partikel katalis kurang 74 mikron. Proses ekstraksi dilakukan selama 120 menit dengan pengambilan sampel secara berkala. Kandungan nikel pada sampel tersebut dianalisis dengan menggunakan instrumen Atomic Absorption Spectroscopy (AAS).  Hasil eksperimen menunjukkan bahwa pada temperatur 85oC dan waktu ekstraksi 120 menit, nikel yang diperoleh paling banyak dibandingkan kondisi operasi lainnya, yaitu sebesar 16,95%. Studi kinetika terhadap data eksperimen tersebut menunjukkan bahwa model lump merupakan model kinetika terbaik untuk menggambarkan fenomena fisis yang terjadi selama proses ekstraksi ini berlangsung. Model lump memberikan persentase kesalahan rata–rata yang lebih kecil dibandingkan model shrinking core. Hal ini mengindikasikan bahwa tahapan difusi internal dan reaksi kimia merupakan tahapan yang mengendalikan proses ekstraksi ini.

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Unduhan

Diterbitkan

2024-01-22

Cara Mengutip

Bahri, E. P., Simanungkalit, I. C. N., Susanti, R. F., Gemilar, G. P., Astuti, W., Petrus, H. T. B. M., & Wanta, K. C. (2024). Kinetika Proses Ekstraksi Katalis Bekas Ni/γ–Al2O3 dengan Pelarut Asam Sulfat: Model Shrinking Core dan Model Lump. JST (Jurnal Sains Dan Teknologi), 12(3), 739–747. https://doi.org/10.23887/jstundiksha.v12i3.46264

Terbitan

Vol 12 No 3 (2023): Oktober

Bagian

Articles

Lisensi

Hak Cipta (c) 2023 Elsha Pamida Bahri, Kevin Cleary Wanta, Ivanna Crecentia Narulita Simanungkalit, Ratna Frida Susanti, Gelar Panji Gemilar, Widi Astuti, Himawan Tri Bayu Murti Petrus

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