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Didik Iswadi
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INDONESIA
Jurnal Ilmiah Teknik Kimia
Published by Universitas Pamulang
ISSN : 25490699     EISSN : 2685323X     DOI : -
Fokus dan Lingkup Jurnal i lmiah Teknik Kimia yaitu pengolahan limbah, teknologi pangan dan material, proses pemisahan, teknik reaksi kimia, dan nanopartikel. Jurnal Ilmiah Teknik Kimia Universitas Pamulang terbit 2 kali dalam setahun yaitu pada bulan Januari dan Juli.
Arjuna Subject : -
Articles 80 Documents
PEMBUATAN BATAKO DENGAN CAMPURAN FLY ASH DAN STYROFOAM Brick Making with a Mixture of Fly Ash and Styrofoam Agustina Dyah Setyowati; Zakki .; Achmad .; Erika .
Jurnal Ilmiah Teknik Kimia Vol 1, No 1 (2017): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (222.922 KB) | DOI: 10.32493/jitk.v1i1.519

Abstract

Environmental pollution caused by industial waste need to be concerned. Fly ash and styrofoam are one of those thing. To reduce amount of industrial waste, fly ash and styrofoam can be transformed into something more useful, such as raw material for brick. Physical and cemical properties of fly ash almost the same as cement, and styrofoam can substitude cement and sand. Research shows that dried a brick in 150oC for an hour can accelerate the process of making a brick, but it can decrease the compressive strength, and the percentage of water adsorption is higher than the control sample (A). in addition of 10% fly sh, the compressive strength obtained is 2.5 MPa, and the highest water adsorption is reached, 20.74%. in addition of 0.1% styrofoam, the value of compressive strength and water adsorption are 2.5 MPa and 15,32%. And in combination of 10% fly ash and 0.1% styrofoam, the value of compressive strength and water adsorption are 1 MPa and 19.18%. result of XRD test shows that in both of the sample (sample A and E1), have the same dominant phase of calcium carbonate (CaCO3) with 103% of intensity at 29.404 angle position.Kata Kunci : Environmental pollution, Brick, Fly Ash, Styrofoam, XRD
KAJIAN AWAL KATALIS HARGA RENDAH UNTUK PRODUKSI DIMETIL ETER SECARA LANGSUNG DARI SYNGAS BATUBARA Bhakti .; Zulaicha .; Joni .; Galuh .; Nurdiah .; Tyas .
Jurnal Ilmiah Teknik Kimia Vol 1, No 1 (2017): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (272.145 KB) | DOI: 10.32493/jitk.v1i1.520

Abstract

Coal utilization including its processing for an alternative energy is quite large in Indonesia and absolutely necessary. Especially on coal with low calorific value like lignite, at handling with direct combustion as in conventional coal power plant is an environmentally friendly manner because its emission contains harmful substances NOx and CO. Approching with clean coal technologies, gasification, emissions of harmful substances into the environment can be reduced. This gasification process, coal is converted into syngas which is an intermediate product that can be directed into various types of alternative fuels such as methanol. Development of efficient and low cost DME synthesis from syngas produced from gasification of coal has been our interest, in particular development  of low cost catalyst which is shown by Low Pressure Fixed Bed Reactor. In this research scheme, we develop the catalyst using Co-precipitation method and Copper based catalyst. In this preliminary study, the DME synthesis of catalysts based on Methanol catalyst has been modified by combined it with HZSM-5 as dual catalyst. This process will perform DME production in one step Fixed Bed Reactor. micromeritic reactor at mild operating condition. The results of modified catalyst to Sud-Chemie/NaHZSM-5 Si/Al 25 showed that DME synthesis at 30 bar and 270oC reach a good conversion, up to 0.9% and predicted still able to increase. Keywords: low rank coal, DME synthesis, low cost catalyst, low pressure fixed bed reactor
PENGARUH WAKTU PEMANASAN PADA PROSES DEASETILASI TERHADAP YIELD CHITOSAN DARI LIMBAH KULIT UDANG SEBAGAI ALTERNATIF BAHAN PENGAWET MAKANAN Budhi .; Satiani .
Jurnal Ilmiah Teknik Kimia Vol 1, No 1 (2017): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (221.502 KB) | DOI: 10.32493/jitk.v1i1.521

Abstract

The solution can be reached from the alternative preservatives are not expensive is using waste from organic materials. An example is chitosan from crab shell waste or waste shrimp shells. Chitosan has a high economic value. So that it can provide benefits to producers or sellers of food and also provide security to the people of the food they will consume. This research  aimed to study the effect of heating time in the process of deacetylation, the yield chitosan from shrimp shell waste as an alternative preservatives. Shrimp shell waste is cleaned first, and then sieved with a 120 mesh size filter. After it was weighed, added a solution of NaOH (deproteination process) comprising water reacted with NaOH and then heated at 100 ° C for 2 hours and then filtered, after which the precipitate obtained is drained. Dried precipitate was added HCl (demineralization), then heated to a temperature of 80 ° C for 8 hours, then filtered and after the precipitate obtained (chitin) is dried. Chitin is reacted with NaOH (deacetylation) and then heated at 80 ° C with a variety of heating time 2 hours, 3 hours, 4 hours, 5 hours and 6 hours, and then filtered. The research showed the optimum heating time is 4 hours at 80 ° C at a yield of 23.08% chitosan.Keywords : chitosan, deacetylation, deproteination, preservatives, yield
PENGARUH WAKTU DAN LUAS PERMUKAAN TERHADAP KETEBALAN PRODUK PADA ELEKTROPLATING ACID ZINC Irman .; Budhi .; Faevi .; Iis .
Jurnal Ilmiah Teknik Kimia Vol 1, No 1 (2017): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (333.061 KB) | DOI: 10.32493/jitk.v1i1.522

Abstract

This research  using Faraday’s law to analize result of measurements. There are 2  parameters varying  in research, the surface area of specimen  ( 6 x 10 cm², 6 x 5 cm² and 5 x 3  cm²) and time  ( 6, 9 and 12 minutes). The research method was done  by electroplating scheme consists of a cathode, anode, electrolyte, which is coupled with a DC electrical current that is placed on Hull Cell. The purpose of research is to determine impact of extent of time and amount of  surface area of specimen to layer thickness occured from the acid zinc electroplating methods. The result of  research obtained is the greater of surface area  will form specimen mass and layer smaller, and the longer of  electroplating process time will form  speciment mass and layer increasing thickerKeywords : Electroplating, Acid Zinc
STUDI PENDAHULUAN KATALIS BIAYA RENDAH UNTUK PRODUKSI METANOL DENGAN TARGET SEBAGAI PROSES KELANJUTAN DARI MODEL SISTEM GASIFIKASI PADA FLUIDIZED BED BERKATALIS Joni .; Adiarso .; Galuh .; Nurdiah .; Tyas .; Bralin .; Erlan .
Jurnal Ilmiah Teknik Kimia Vol 1, No 1 (2017): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (348.848 KB) | DOI: 10.32493/jitk.v1i1.523

Abstract

Utilization of coal as well as its processing as an alternative energy is quite large in Indonesia and absolutely necessary. Especially on coal with low calorific value such as lignite, handling with direct combustion as in conventional coal power plant is an environmentally friendly manner because its emission contains harmful substances NOx and CO. With clean coal technologies (such as gasification), emissions of harmful substances into the environment can be reduced. This gasification process, coal is converted into syngas which is an intermediate product that can be directed into various types of alternative fuels such as methanol.Development of efficient and low cost methanol synthesis from syngas produced from gasification of coal has been our interest, in particular development  of low cost catalyst which is shown by Low Pressure Fixed Bed Reactor. In this research scheme, we develop the catalyst using Co-precipitation method and Copper based catalyst.. In this preliminary study, the synthesis of catalysts based on CuZnAl has been performed and tested in once trough process micromeritic reactor at mild operating condition. The results show that methanol synthesis at 20 bar and 270oC reach a good conversion, i.e. 1.15% of methanol at Molar Ratio (Cu:Zn / CuZn: Al2O3): 4: 3: 1. These results have been compared to commercial catalysts on the same conditions which reached 0.26% of methanol .  Kata Kunci : low rank coal, methanol synthesis, low cost catalyst, low pressure fixed bed reactor
PEMBUATAN SABUN DARI LIMBAH MINYAK JELANTAH SAWIT DAN EKSTRAKI DAUN SERAI DENGAN METODE SEMI PENDIDIHAN Agus .; Didik .; Nida .; Gloria .
Jurnal Ilmiah Teknik Kimia Vol 1, No 1 (2017): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (215.769 KB) | DOI: 10.32493/jitk.v1i1.524

Abstract

Has done a solid soap-making by utilizing waste palm oil and lemongrass leaf extract. Refined palm oil waste by the addition of NaOH 15%, then added activated carbon is heated and filtered. Saponification process is done using NaOH 40% by weight ratio of palm oil and NaOH 2: 1, while the leaves of lemongrass extract, written with two variations, namely 14%, 15% and 20% by weight. Testing the quality of the soap made include testing of pH, water content, and a color test. From these results obtained in all variations addition of lemongrass leaf extracts produce soaps with a pH of 9.8 s / d 9.9, which meets the SNI standard. Testing the water content is obtained that meet SNI 06-3532-1994 is the addition of lemon grass leaf extract 14% by weight with a moisture content of 15%. While the addition of lemongrass extract 15% and 20% obtained water content exceeded that obtained SNI standard by 17% by weight and 37.7% by weight.Keywords: NaOH, palm oil, SNI
EKSTRAKSI PEKTIN PADA KULIT BUAH NAGA SUPER MERAH (HYLOCEREUS COSTARICENCIS) DENGAN VARIASI SUHU EKTRAKSI DAN JENIS PELARUT Suwoto - Suwoto; Anita - Septiana; Gita - Puspita
Jurnal Ilmiah Teknik Kimia Vol 1, No 2 (2017): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (378.958 KB) | DOI: 10.32493/jitk.v1i2.715

Abstract

ABSTRAK Pengambilan Pektin dari buah naga dilakukan dengan ekstraksi pada  temperatur pemanasan 50°C, 60°C dan 70°C menggunakan jenis pelarut yang berbeda, yaitu asam oksalat 0.05N dan asam asetat 0.05N. Kulit buah naga yang telah kering dihaluskan, diekstraksi sesuai variabel yang ditentukan lalu bahan disaring dengan kertas saring. Filtrat dipanaskan 80°C - 95°C hingga volume setengah dari volume sebelumnya. Filtrat didinginkan dan ditambahkan dengan etanol 95% dengan volume perbandingan 1:1 dan diendapkan selama 24 jam. Filtrat dipisahkan dari etanol dan dipanaskan 80°C selama 4 jam. Pektin kering ditimbang sebagai hasil. Pektin yang dihasilkan dianalisa karakteristiknya yang meliputi berat ekivalen, kadar metoksil, kadar galakturonat, dan derajat esterifikasi. Berdasarkan keempat parameter tersebut, pektin hasil ekstraksi terbaik diperoleh pada suhu 70°C dengan pelarut Asam Oksalat dengan hasil berat ekivalen 1235,929  kadar metoksil 5,0902, kadar galakturonat 42,34 dan derajat esterifikasi 68,26.Kata kunci : Pektin, ekstraksi., filtrat, karakteristik, derajat esterifikasi
APLIKASI ZEOLIT PADA PEMBUATAN SCRUBBER GAS ETILEN (C2H4 ) UNTUK PENGAWETAN BUAH NANGKA KUPAS Agustina Dyah Setyowati
Jurnal Ilmiah Teknik Kimia Vol 1, No 2 (2017): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (468.003 KB) | DOI: 10.32493/jitk.v1i2.716

Abstract

ABSTRAK Zeolit diaplikasikan dalam pembuatan scrubber gas etilen. Spektrometer fotoakustik laser CO2 digunakan untuk menentukan adsorptivitas scrubber dalam menangkap gas etilen. Parameter karakteristik adsorptivitas scrubber yang diteliti meliputi pengaruh konsentrasi bahan aktif dan kapasitas adsorpsi. Diperoleh hasil adsorptivitas scrubber meningkat dengan peningkatan konsentrasi bahan aktif (KMnO4) pada zeolit berdiameter 1,4 mm. Kapasitas adsorpsi scrubber zeolit-KMnO4 dengan konsentrasi KMnO4 4% dan diameter zeolit 1,4mm sekitar 96 ppmliter/gram. Pada suhu ruangan, penggunaan scrubber dengan konsentrasi KMnO4  4 % dan  diameter zeolit 1,4 mm sebanyak 5 gram dapat memperpanjang umur simpan buah nangka kupas hingga 3 hari dari umur simpan buah kontrol.Kata kunci : zeolit, gas etilen, scrubber, umur simpan, buah nangka kupas.
UJI ORGANOLEPTIK DAN TINGKAT KETAHANAN PRODUK TAHU BERPENGAWET KITOSAN Budhi - Indrawijaya; Arista - Paradiba; Sri Antika Sari
Jurnal Ilmiah Teknik Kimia Vol 1, No 2 (2017): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (121.788 KB) | DOI: 10.32493/jitk.v1i2.717

Abstract

ABSTRAK Tahu merupakan makanan berbahan dasar kacang kedelai yang banyak dikonsumsi masyarakat Indonesia. Namun  tahu  merupakan bahan pangan yang high perishable atau cepat rusak, hal ini menyebabkan tahu tidak dapat bertahan lama. Untuk itu diperlukan tindakan pengawetan pada tahu agar umur simpan dan tingkat ketahanan tahu menjadi lebih lama. Dampaknya, banyak produsen yang mengawetkan tahu menggunakan bahan kimia yang tidak layak untuk dikonsumsi. Salah satu cara pengawetan tahu yang dianjurkan adalah dengan mengaplikasikan larutan kitosan, yang merupakan bahan pengawet alami dan aman di cerna oleh tubuh. Penelitian ini dilakukan untuk memberikan solusi atas penggunaan bahan pengawet berbahaya yang sudah menjadi budaya dalam produksi tahu, mengetahui tingkat ketahanan tahu dan tingkat penerimaannya di masyarakat. Metode yang digunakan adalah mengaplikasikan kitosan sebagai campuran  koagulan dan sebagai edible coating dengan variabel yaitu konsentrasi kitosan, waktu penyimpanan, suhu  penyimpanan dan perbandingan metode yang digunakan. Uji organoleptik tingkat  kesukaan yang dilakukan yaitu penampakan produk, tekstur, aroma dan kekenyalan. Berdasarkan hasil penelitian diperoleh bahwa secara keseluruhan panelis lebih menyukai produk tahu yang menggunakan metode  edible coating. Penggunaan kitosan sebagai bahan pengawet alami dapat mempertahankan waktu simpan produk tahu selama 14 hari dengan suhu ideal penyimpanan yaitu 4°C terhadap kedua metode perlakuan bahan pengawet kitosan.Kata kunci : edible coating, kitosan,  koagulan, tahu
PEMANFAATAN SAMPAH PLASTIK LDPE DAN PET MENJADI BAHAN BAKAR MINYAK DENGAN PROSES PIROLISIS Didik - Iswadi; Fatmi - Nurisa; Erlina - Liastuti
Jurnal Ilmiah Teknik Kimia Vol 1, No 2 (2017): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (287.437 KB) | DOI: 10.32493/jitk.v1i2.718

Abstract

ABSTRAK Pirolisis sampah plastik merupakan proses dekomposisi senyawa organik yang terdapat dalam plastik melalui pemanasan tanpa oksigen. Pada proses pirolisis senyawa hidrokarbon rantai panjang diubah menjadi senyawa hidrokarbon yang lebih pendek dan dijadikan bahan bakar alternatif. Penelitian ini bertujuan untuk mengetahui perbandingan hasil volume yang diperoleh dari LDPE dan PET, dan mengetahui hasil kualitas bahan bakar minyak yang dihasilkan dari LDPE dan PET. Pirolisis sampah plastik ini dilakukan dengan umpan yaitu sampah plastik jenis LDPE (Low Density Polyethylene) dan sampah plastik jenis PET (Polyethylene Terephthalate). Proses pirolisis dilakukan pada reaktor selama 2 jam dengan suhu 250oC dan tekanan 2 bar dengan umpan sebanyak 1 kg. Hasil minyak pirolisis dari LDPE  diperoleh sebanyak 525 mL sedangkan pada dari PET diperoleh sebanyak 368.47 mL. Densitas minyak hasil pirolisis LDPE dan PET mendekati nilai densitas dari minyak tanah. Viskositas minyak hasil pirolisis dengan bahan LDPE dan PET termasuk ke dalam jenis minyak tanah, Nilai kalor minyak hasil pirolisis dengan bahan LDPE mendekati nilai kalor dari minyak diesel sedangkan nilai kalor minyak hasil pirolisis dengan bahan PET mendekati nilai kalor minyak tanah. Untuk nilai titik nyala tidak bisa dibandingkan dengan standar karena keterbatasan alat dan untuk nilai titik api tidak ada standar baku mutunya.Kata Kunci: pirolisis, LDPE, PET, densitas, viskositas