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All Journal FLUIDA Jurnal Teknik
Tatang Hernas Soerawidjaja
Institut Teknologi Bandung
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengambilan Kembali Vanadium Pentaoksida dari Katalis Bekas Lienda Aliwarga; Tatang Hernas Soerawidjaja; Agnes Veronica Victoria; Reynard .
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 17 No 2 (2018): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jt.vol17no2.87

Abstract

Katalis vanadium bekas diperkirakan akan menjadi salah satu sumber utama persediaan vanadium di masa mendatang. Hasil analisis vanadium dalam katalis vanadium bekas menunjukkan bahwa kadar V2O5 nyamasih cukup banyak untuk diambil dan diolah kembali. Dalam penelitian ini, suatu prosedur telah dikembangkan untuk mengesktraksi vanadium dari katalis vanadium bekas berdasarkan prosedur yang dikembangkan oleh peneliti terdahulu. Katalis vanadium bekas uji coba prosedur menunjukkan bahwa metode gabungan ekstraksi vanadium dari katalis vanadium bekas menggunakan pelarut basa Na2CO3 dan H2O2 pada umpan (tahap ekstraksi pertama) dan NaOH (tahap ekstraksi kedua) yang diikuti dengan netralisasi filtrat dengan asam H2SO4 merupakan prosedur terbaik. Lebih lanjut, terdapat tiga variabel yang sangat berpengaruh dalam pengambilan kembali vanadium dari katalis vanadium bekas, yang ditandai dengan nilai probability of being active di atas 50%. Ketiga variabel tersebut adalah temperatur pengadukan pada tahap ekstraksi II, penambahan larutan H2O2 di umpan dan waktu pengadukan pada tahap ekstraksi I dengan nilai probability of being active secara berturut-turut sebesar 100%, 86%, dan 56%. Untuk mendapatkan perolehan vanadium yang lebih tinggi perlu diadakan penelitian lanjutan yang mengoptimumkan variabel-variabel tersebut.
The Effect of Adding Mg-Zn/Al Hydrotalcite on the Decarboxylation Product of Hydroxy Pelargonate Soap Ella Melyna; Tirto Prakoso; Tatang Hernas Soerawidjaja
Fluida Vol 16 No 1 (2023): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16i1.4502

Abstract

Pelargonic acid is a by-product of the ozonolysis reaction of oleic acid to azelic acid. Pelargonic acid decarboxylation is the process of removing a carboxyl group (-COO-) from pelargonic acid (C9H18O2) to produce n-octane (C8H18) hydrocarbons, which are the main group of hydrocarbons that make up gasoline. The main parameter in gasoline is the octane number. The octane number of n-octane (C8H18) is 15, which is considered low, while good gasoline is desired to have a high octane number. To convert straight-chain alkanes and alkenes into branched alkanes and alkenes, an isomerization process can be carried out on vapor-cracking products using a solid catalyst. Transition metals and their compounds can be used as catalysts. Transition metals are able to change the oxidation state, create complex compounds, absorb other substances on the metal surface, and activate these substances. The transition metals used in this study are Zn and Al. The stages of the research process were the preparation of Mg-Zn/Al hydrotalcite base, the manufacturing of hydroxy pelargonate soap, and the decarboxylation of hydroxy pelargonate soap. The results of this study found that the highest product gain, namely 64.76%, occurred when Mg-Zn/Al = 5:5:2 hydrotalcite was in 300% excess. The highest product selectivity to 2.16% n-octane occurred in the use of a 300% excess of Mg-Zn/Al = 3:3:2 hydrotalcite. A low Al/Mg/Zn ratio of 2:10 can increase product yield; a high Al/Mg/Zn ratio of 2:6 can increase product selectivity and lower the freezing point.
Co-Authors Agnes Veronica Victoria Lienda Aliwarga Melyna, Ella Reynard . Tirto Prakoso