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All Journal Indonesian Chimica Letters LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI
Yudi Aris Sulistiyo
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Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Energy Environmental Science

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UJI AKTIVITAS KATALIS CLAY TERMODIFIKASI CU DALAM REAKSI HIDRORENGKAH SENYAWA 1-OKTADEKANOL Wiwit Puji Lestari; Donatus Setyawan Purwo Handoko; Yudi Aris Sulistiyo
Lembaran Publikasi Minyak dan Gas Bumi Vol. 53 No. 1 (2019): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Telah dilakukan proses perengkahan secara katalitik senyawa 1-oktadekanol dengan katalis clay termodifikasi Cu. Hasil perengkahan dianalisis dengan menggunakan X-ray Flouresence (XRF), XRD, adsorpsi piridin dan BET. Katalis dimasukkan dan dipanaskan dalam tabung reaktor, umpan dimasukkan dan dipanaskan pada tabung terpisah sampai berubah menjadi uap sambil dialiri gas H2. Cairan hasil perengkahan selanjutnya dianalisis dengan menggunakan GC-MS. Hasil karakterisasi menunjukkan penurunan rasio Si/Al dari katalis clay menjadi clay termodifikasi Cu, sedangkan % kandungan Cu dalam katalis meningkat sebesar 7.39%. Struktur kristal kedua katalis hampir sama, namun muncul beberapa puncak baru yang menunjukkan bahwa logam Cu berhasil dimodifikasikan. Keasaman katalis muncul pada daerah 1638,6 dan 1627,03 cm-1 yang menunjukkan jenis asam bronsted. Luas permukaan dan volume pori katalis mengalami kenaikan walau sangat kecil yaitu berturut-turut 45.719 dan 0.009. Aktivitas katalis baik katalis clay dan clay termodifikasi Cu kurang baik, dimana produk yang dihasilkan >C12 lebih banyak daripada C6-C12.
Extraction of Iron (Fe) From Fly Ash Using Citric Acid and Oxalic Acid as Lixiviant Suwardiyanto; Waladatus Sholikhaha; Dyah Hayuning Tyasa; Yudi Aris Sulistiyo
Indonesian Chimica Letters Vol. 4 No. 2 (2025)
Publisher : Department of Chemistry, FMIPA, UNEJ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/icl.v4i2.60001

Abstract

Reduction of iron (Fe) content within fly ash has been conducted by solid-liquid extraction using oxalic acid and citric acid as lixiviant. Separation of iron compounds using magnet and acid treatment have been performed prior to the extraction to decrease the iron concentration within the fly ash. Iron within the fly ash was extracted in several pH condition and several Fe/lixiviant molar ratio to evaluate their effect on the extraction. The extraction performance was evaluated toward residual iron concentration in the fly ash and amount of fly ash after extraction process. Residual iron was determined by spectrometer Uv-Vis using o-phenanthroline whereas the amount of fly ash was determined gravimetrically. Extraction using citric acid at pH of 6 and molar ratio of 1 : 4 has highest iron removal from fly ash whereas the highest fly ash residual was obtained by extraction at pH of 7 molar ratio of 1 : 2. The highest performance of oxalic acid as iron lixiviant was obtained at pH of 6 and molar ratio of 1 : 6 and the highest fly ash residual at pH of 6 and molar ratio of 1 : 3.
Co-Authors Donatus Setyawan Purwo Handoko Dyah Hayuning Tyasa Suwardiyanto Waladatus Sholikhaha Wiwit Puji Lestari