Article Per Year (5 Year)
p-Index From 2020 - 2025
0.23
P-Index
This Author published in this journals
All Journal Jurnal Sains dan Seni ITS Walisongo Journal of Chemistry
Suprapto Suprapto
Institut Teknologi Sepuluh Nopember, Surabaya
Arts Humanities Chemistry

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Pemurnian Silika Pada Abu Layang Dari Pembangkit Listrik di Paiton (PT YTL) Dengan Pelarutan Asam Klorida dan Aqua regia Denida Mega Anggia; Suprapto Suprapto
Jurnal Sains dan Seni ITS Vol 5, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM), ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (502.11 KB) | DOI: 10.12962/j23373520.v5i2.17415

Abstract

Penelitian mengenai pemurnian silika melalui pelarutan menggunakan asam klorida (HCl) dan aqua regia pada abu layang yang berasal dari PT YTL, Paiton, telah dilakukan.Parameter yang digunakan dalam penelitian ini adalah konsentrasi asam dan waktu pelarutan HCl. Pengaruh pelarutan unsur Fe, Ca, dan Al dari sampel juga diteliti.Dari hasil XRD abu layang, terkandung mineral quartz, mullite, hematite dan kalsium oksida. Kondisi paling baik pada saat pelarutan sampel adalah menggunakan pelarutan aqua regia, mampu menghasilkan kadar Si sebesar 68,07%, sedangkan kondisi paling baik pelarutan HCl adalah pada konsentrasi HCl 1 M dengan waktu pelarutan 2.5 jam, mampu menghasilkan kadar Si sebesar 34,05%. Peningkatan konsentrasi HCl akan menurunkan kadar silika yang diperoleh.
Effect of Ag addition into the Activity of Titanium Silicate-1 Catalyst in Cyclohexanone Reaction Dyah Fitasari; Didik Prasetyoko; Suprapto Suprapto
Walisongo Journal of Chemistry Vol 4, No 2 (2021): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v4i2.9384

Abstract

Titanium Silicate-1 (TS-1) has been successfully modified by combining Silver (Ag) metals. In this study, the preparation of Ag/TS-1 was carried out by impregnation method using a solution of silver nitrate (AgNO3) as a precursor to TS-1 with a loading variation of 0.5%, 1%, 2%, and 4%. Impregnation carried out on TS-1 aims to disperse Ag (1) only attached to the surface of TS-1 particles (before calcination/TK) and (2) on the entire surface of TS-1 particles (after calcination/K). The synthesized catalyst was then characterized by X-ray diffraction, infrared spectroscopy, and pyridine adsorption techniques. The XRD pattern shows that all the catalysts have high crystallinity with MFI structure, and there is no other crystalline phase. The infrared spectra showed that the titanium tetrahedral in TS-1 remained after Ag impregnation. The TS-1 and Ag/TS-1 catalysts were analyzed for their surface acidity using pyridine adsorption on the sample. The pyridine adsorption technique showed the presence of Lewis sites on Ag/TS-1. In this study, the presence of Ag loading on the Ag/TS-1 catalyst affected the TS-1 catalytic activity. The amount of cyclohexanone oxime product produced in XAg/TS-1 was more than in Ag/TS-1.
Co-Authors Denida Mega Anggia Didik Prasetyoko Dyah Fitasari