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Back Matter Reaktor Vol 15 No. 4 Oktober 2015 Widayat, W
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (297.858 KB) | DOI: 10.14710/reaktor.15.4.-

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Front Mattter Vol 17 No. 4 December 2017 Widayat, w
Reaktor Volume 17 No. 4 Desember 2017
Publisher : Dept. of Chemical Engineering, Diponegoro University

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Cover, list of contents , Preface and editorial board
Bagian belakang Vol 16 No. 3 September 2016 Widayat, W
Reaktor Volume 16 No.3 September 2016
Publisher : Dept. of Chemical Engineering, Diponegoro University

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Bagian belakang yang berisi indeks judul, subyek dan author
Front Matter Reaktor Vol 16 No. 2 Juni 2016 Widayat, W
Reaktor Volume 16 No. 2 Juni 2016
Publisher : Dept. of Chemical Engineering, Diponegoro University

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Back Matter Vol 17 No. 04 December 2017 Widayat, W
Reaktor Volume 17 No. 4 Desember 2017
Publisher : Dept. of Chemical Engineering, Diponegoro University

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List of Author, indexing and Author Guidelines
Bagian Depan Reaktor Vol 16 No 4 2016 Widayat, W
Reaktor Volume 16 No.4 Desember 2016
Publisher : Dept. of Chemical Engineering, Diponegoro University

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Cover daftar istri dan mitra bestari
Back Matter Reaktor Vol 16 No.2 Jun i 2016 Widayat, W
Reaktor Volume 16 No. 2 Juni 2016
Publisher : Dept. of Chemical Engineering, Diponegoro University

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Bagian Depan Reaktor Vol 17 No. 1 Maret 2017 Widayat, W
Reaktor Volume 17 No.1 Maret 2017
Publisher : Dept. of Chemical Engineering, Diponegoro University

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Bagian depan Reaktor yang terdiri dari Cover, Daftar isi, Daftar pengelola atau editorial serta pengantar dari Redaksi Raktor
PEMBUATAN BIODIESEL DARI MINYAK GORENG BEKAS DENGAN PROSES CATALYTIC CRACKING Buchori, Luqman; Widayat, Widayat
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (395.817 KB) | DOI: 10.14710/teknik.v28i2.2116

Abstract

Crude oil is a source of energy which is not be renewable. This fact motivates so much countries ineconomizing on fuel. Many researches have been done to gets another fuel substitute the crude oil.Biodiesel is represented as fuel instead of diesel fuel, and it is produced from vegetable oil. In the otherside, ex-cooking oil is waste-product from food industry, restaurant and household which is potential tobe alternative fuels because of the high contents of carbon and hydrogen atoms. Commonly the biodieselmade from vegetable oil by esterification and transesterification process. But if using esterification andtransesterification process to ex-cooking oil material, it is not economically feasible because the processmakes another reaction between alkaly catalist and oil to produce soap. One of biodiesel process iscatalytic cracking of the ex-cooking oil. This research is aimed to analyze zeolite catalist size effect(0.125mm; 0.3375mm; 0.425mm; 0.85mm; 1.18mm), and acid concentration on the product (2N; 3N;4N). This result shows that at 4N acid concentration and 0.125 mm zeolite catalist size is optimal whichcan reach diesel specification.
STUDI PENGARUH METODE PEMBUATAN DAN SUMBER BAHAN BAKU PADA PROSES PRODUKSI KATALIS DARI ZEOLIT ALAM Widayat, Widayat; Satriadi, H; Roesyadi, Achmad; Rachimoellah, H M
METANA Vol 9, No 01 (2013): Juli 2013
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.561 KB) | DOI: 10.14710/metana.v9i01.7206

Abstract

Abstract Indonesia has the potential for considerable natural zeolites. This natural zeolites, silica deposits typically have amounted to 60%, it also contains components of alumina. Silica and alumina oxide compound that can be used as a catalyst, particularly in the process of dehydration. This research aims to study the influence of the method of manufacture of catalysts in the production process of natural zeolite catalyst. The observed response is the surface area in comparison with silica, alumina and kristalitas. The surface area is measured by the method kristalitas and BET with XRD analysis as well as the composition of the silica-alumina with AAS. The methods used in this research is the process of exchanging ions-development with alcohol and dealuminiation process with hydrochloric acid solution. The raw materials used are natural zeolite from Malang, Lampung Province and Regency of Gunung Kidul. The results showed that dealuminasi process with hydrochloric acid produces a better surface area compared to the ion exchange process and development with alcohol. Besides the resulting catalyst with silicate dealuminasi process is a catalyst if the raw material of the Regency of Gunung Kidul and mordenite type if the raw materials used originate from Malang. Key words : Zeolite catalyst, natural zeolites, surface area, crystallite,Si/Al comparison
Co-Authors A Abdullah A Abdurrakhman Abdullah Abdullah Achmad Roesyadi Achmad Roesyadi Achmad Wildan ADE ARTA, MOCHAMAD ZAINUDIN Adi Darmawan Adit Rizky Wicaksono Afriani, Nurfika Agus Suprihanto Ahmad Juanda Ahmad Ni’matullah, Albaari Aini, Apsari Puspita Aji Baharsyah Aji Prasetyaningrum Aji, Satriyo Akbar Asfar, A.M. Iqbal Al-Baari, Ahmad N Al-Baarri, Ahmad Ni'matullah Al-Baarri, Ahmad Ni’matullah Alfareza, Muhammad Ircham Almaas Salwa, Diah Ayu Andi Friadi Andika Pradifan Andrew Bryano Kermite, Andrew Bryano Andri Cahyo Kumoro Andri Cahyo Kumoro Andrianto, Novian Andry Anggoro Arahim Anggra Widhi Anggra Widhi Anik Sarminingsih, Anik Annisa Metantya Maharani Ari Eko Prasetyo Ari Eko Prasetyo Ariadi, Ariadi Arianti Nuur Annisa Arief Budiman Aris Triwiyatno Arwan, Berriandi Aulia, Haris Nu’man B Budiyono Bacthiar, Hafni Bagus Agang Sudrajat Bakti Jos Bambang Cahyono Banowati, Tria Nita Berkah Fajar Tamtomo kiono Bernike Vemmialia Jonfita Budi Warsito Budianto, Irawan Arief Catur Pramono D. Ingrid A D. Soetrisnanto Dani Puji Utomo Danny Soetrisnanto DENNY SANJAYA Devina Ingrid A. Dita Ayu Sofiati Driastuti, Faradilla Dyah Hesti Wardhani Edward, Leonardo Ela, Hulasoh Elijah Syarief Elysia, Alvina Enda Merizki br Ginting Fauzandy Husna Setyanto Ferdy D, Erbert H Hadiyanto H M Rachimoellah H Satriadi H. Satriadi H. Satriadi Hadiyanto Hadiyanto Hanapi bin Mat Hanapi bin Mat Handung Nuryadi Hanifa Zakiyatul Urbach Hantoro Satriadi Hantoro Satriadi Hantoro Satriado Haris Nu'man Aulia Haris Nu’man Aulia Hasanah, Alfi Hendra Try Ardianto Hendro, Andika Heru Susanto Hesti Rahayu I. Hartati Ika Windrianto K. Handono Indah Hartati Iqbal Mubarak Irawan Arif Budianto Irayani, Indah Jafron Wasiq Hidayat Johnner P Sitompul Khoirun Nisa Kurdianto Kurdianto Kurnia, Atik Kusdiantini, Endang Kusmiyati, K Lukman Hakim Firdaus Luqman Buchori Luqman Buchori M. Djaeni M. Hadi M. Hadi M. Hadi Makrufah Hidayah I Marcelinus Christwardana Maria Siahaan Marta Chandra Anikke Putri Masyhad Masyhad Meiny Suzery Melati, Emilla Mhd. Adithia Perdana Arman Mochamad Arief Budihardjo MSK. Tony Suryo Utomo Muchammad Muchammad Muhammad Farizan Praevia Muhammad Hilmazar Hawari Muhammad Rachimoellah Muhammad Rachimoellah Muhammad Syukri Hasan Muhammad Syukri Hasan Nabilla Salma Listyawijayanti Nasir, Yahya Ndaru Okvitarini Ngadiwiyana M.Si. S.Si. Ngurah Widiantara Ni'matuzahroh Ni'matuzahroh Novianti, Khusnul Rofida Noviyanto, Sigit Nur Rokhati Nurjannah, Rifa Nurul Yaqin Pandapotan, Boris Poltak Prakoso, Satrio Budi Prasetyo, Ahmad Wisnu Pratomo, Shendy Eko Priyosetyoko Priyosetyoko, Priyosetyoko Puja Chrisdianto Manapa Putri, Sylvia Rahmi Rahmania, Yusi Luluk Ratnawati Ratnawati Razak, Habibie Riky Yonas Riky Yonas Riva Amrulloh Roz, Kenny S Suherman S Supriyandi Samudra, Makitta Widi Saudale, Jeanette Mutiara Paula Sekarningtyas, Nazifa Seno, Abdi Setia Budi Sasongko Setia Budi Sasongko Setiadi, Muhammad Irfan Sianturi, Aurelia Genesya Silviana Silviana Silviana, S Siti Nur Khairunisa Aroli Sri Nastiti Andharini Sri Puji Lestari Sri Widodo Agung Suedi Sriatun Sriatun Striadi, H. Sugiyanto - Sulardjaka Sulardjaka Sulardjaka Sulardjaka Sulardjaka, S Sulastri, Cucu Sumiati Sumiati Suroso Agus Saputro Sussatrio, Hardito Syafrudin Syafrudin Syaiful . Sylvia Rahmi Putri Tatang H. Soerawidjaja Taufiq, Akbar Teguh Purnomo, Teguh Tri Winarni Agustini Tri Winarni, Agustini Tutuk Djoko Kusworo Uray Irzandi Uray Irzandi Utama, Bobby Indra Vicky Ramadhani, Vicky widodo, anton sri Wira Pinem Yanuar Rifianto YS Darmanto Yudhy Dharmawan Yuliani, Kristina Wulan Yulita Arni Priastiwi Yuliyandjaja, John Philia Yusi Luluk, Rahmania