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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Bulletin of Chemical Reaction Engineering & Catalysis Journal of Natural Sciences and Mathematics Research Jurnal Sains & Teknologi Lingkungan Jurnal Penelitian Pertanian Terapan Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Indonesian Journal of Pure and Applied Chemistry SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan CHEESA: Chemical Engineering Research Articles Angkasa: Jurnal Ilmiah Bidang Teknologi Indonesian Journal of Chemical Analysis (IJCA) Jurnal Inovasi Teknik Kimia Jurnal Inovasi Penelitian Equilibrium Journal of Chemical Engineering REACTOR : Journal of Research On Chemistry And Engineering Jurnal Teknologi Kimia Mineral Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Rekayasa Proses Jurnal abimana (Jurnal Pengabdian Kepada Masyarakat Nasional)
Wulandari, Yeni Ria
Politeknik Negeri Lampung
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Product Distribution of Chemical Product Using Catalytic Depolymerization of Lignin Damayanti Damayanti; Yeni Ria Wulandari; Ho-Shing Wu
Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 2 Year 2020 (August 2020)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.15.2.7249.432-453

Abstract

Lignin depolymerization is a very promising process which can generate value-added products from lignin raw materials. The main objective of lignin depolymerization is to convert the complex molecules of lignin into small molecules. Nevertheless, lignin is natural polymer which the molecules of lignin are extremely complicated due to their natural variability, and it will be a big challenge to depolymerize lignin, particularly high water yield. The various technology and methods are developed to depolymerize lignin into biofuels or bio chemical products including acid/base/metallic catalyzed lignin depolymerization, pyrolysis of lignin, hydroprocessing, and gasification. The distribution and yield of chemical products depend on the reaction operation condition, type of lignin and kind of catalyst. The reactor type, product distributions and specific chemicals (benzene, toluene, xylene, terephthalic acid) production of lignin depolymerization are intensive discussed in this review. Copyright © 2020 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
IDENTIFIKASI KOMPONEN SENYAWA VOLATIL DALAM CUKA BAMBU (BAMBOO VINEGAR) YANG DIPRODUKSI MELALUI PROSES PIROLISIS DI PT. HANAN ALAM LESTARI (MITRA BINAAN CSR PT. BUKIT ASAM Tbk) Oktaf Rina; Rizka Novi Sesanti; Dedi Teguh; Yeni Ria Wulandari; Hamdani Hamdani; Aang Haryadi
Jurnal Inovasi Penelitian Vol 2 No 6: Nopember 2021
Publisher : Sekolah Tinggi Pariwisata Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47492/jip.v2i6.1011

Abstract

This study aims to identify volatile chemical components in bamboo vinegar (vinegar bamboo) produced by pyrolysis by PT. Hanan Alam Lestari (Guided Partner of PT. Bukit Asam Tbk). The raw material used is bamboo processing waste in the form of bamboo powder and pieces by pyrolysis process at a temperature of 300-450oC. The chemical compounds were analyzed using the Gas chromatography-mass spectroscopy (GC-MS) method at the Laboratory of Research and Development of Forest Products, Bogor. Specifications of tools used to investigate gas or liquid component products using a capillary column (Aglient HP-5MS length 30 m, diameter 250 m, film thickness 0.25 m). By holding the oven temperature at 50°C for 5 minutes, increasing at 5°C/min to 300°C, holding there for 60 minutes and helium as carrier gas. The results of the analysis showed that there were 15 components of volatile compounds and several dominant compounds in bamboo vinegar, namely acetic acid 31.28%; phenol 2-methoxy-guaiocol (12.95%); carbamic acid (11.23%); 2-heptanamine (6.75%) and phenol 4-methoxy-p-cresol (5.56%). The compound components in bamboo vinegar are thought to have antioxidant, antimicrobial and specific color and flavor-forming properties. Several chemical components detected in bamboo vinegar are recommended for use in agriculture as biofungicides and inhibitor compounds.
PELATIHAN PEMBUATAN PROCESS FLOW DIAGRAM (PFD) MENGGUNAKAN APLIKASI VISIO DI SMKN 8 BANDAR LAMPUNG Yeni Ria Wulandari; Yeni Variyana; Dedi Teguh; Amelia Sri Rezki; Fadian Farisan Silmi; Dewi Ermaya; Shintawati Shintawati; Andika Wahyu Purnama
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 7, No 1 (2023): March
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v7i1.13512

Abstract

ABSTRAKPengembangan pendidikan Sekolah Menengah Kejuruan (SMK) di Indonesia harus diarahkan untuk beradaptasi dengan dinamika global dan nasional khususnya terhadap Revolusi Industri 4.0. Berdasarkan penerapan Kurikulum Merdeka, program keahlian yang ada di SMK Negeri 8 Bandar Lampung salah satunya adalah Teknik Kimia Industri dengan peserta sebanyak 25 orang. Adapun tujuan dari kegiatan pengabdian kepada masyarakat (PKM) yaitu memberikan pelatihan desain process flow diagram (PFD) menggunakan microsoft visio kepada siswa jurusan teknik kimia di SMKN 8 Bandar Lampung. Pengetahuan, keterampilan, dan pengalaman dalam merancang proses pabrik secara sederhana maupun kompleks sangat diperlukan di dunia industri, khususnya bidang keahlian teknik kimia. Dari hasil pelatihan, seluruh peserta sangat antusias dan dapat menyelesaikan desain PFD hingga selesai serta beberapa siswa aktif bertanya terkait materi yang diberikan. Para peserta dengan persentase 98% menyatakan bahwa adanya peningkatan pengetahuan dan keterampilan terkait pembuatan proses industri fermentasi melalui PFD. Kegiatan ini diharapkan dapat menambah keterampilan siswa jurusan teknik kimia SMKN 8 Bandar Lampung agar siap menjadi sumber daya manusia (SDM) unggul. Kata kunci: PKM; microsoft visio; PFD. ABSTRACTThe development of Vocational High School education in Indonesia must be directed to adapt to global and national dynamics, especially to the Industrial Revolution 4.0. Based on the implementation of the Merdeka Curriculum, one of the expertise programs in SMK Negeri 8 Bandar Lampung is Industrial Chemical Engineering with 25 participants. The purpose of this community service activity (PKM) is to provide process flow diagram (PFD) design training using microsoft visio to students majoring in chemical engineering at SMKN 8 Bandar Lampung. The knowledge, skills, and experience in designing simple and complex plant processes are needed in the industrial world, especially in the field of chemical engineering expertise. From the results of the training, all participants were very enthusiastic and were able to complete the PFD design to completion and some students actively asked questions regarding the material provided. The participants with a percentage of 98% stated there was an increase in knowledge and skills related to making industrial fermentation processes through PFD. This activity is expected to increase the skills of students majoring in chemical engineering at SMKN 8 Bandar Lampung so that they are ready to become excellent human resources (HR). Keywords: PKM; microsoft visio; PFD.
Pengaruh Konsentrasi Karbon Disulfida (Cs2) Terhadap Kinerja Biosorben Selulosa Xanthate Untuk Penjerapan Logam Berat Nita Pita Sari; Dewi Agustina Iryani; Dedi Teguh; Yeni Ria Wulandari
Jurnal Sains & Teknologi Lingkungan Vol. 15 No. 2 (2023): SAINS & TEKNOLOGI LINGKUNGAN
Publisher : Teknik Lingkungan Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pencemaran logam berat merupakan salah satu masalah penting yang menimbulkan efek beracun. Logam berat yang terakumulasi pada tubuh manusia akan mengakibatkan berbagai resiko yang berbahaya. Mengingat bahaya yang ditimbulkan oleh logam berat, berbagai metode telah digunakan untuk menurunkan kadar logam berat. Salah satu metode yang digunakan dalam penelitian ini yaitu adsorpsi biosorben selulosa xanthate dari selulosa bagas tebu untuk menjerap logam berat Pb2+ dan Cu2+. Pembuatan biosorben dilakukan melalui proses xhantasi dengan memvariasikan konsentrasi Karbon Disulfida (CS2) yaitu 120%, 140%, dan 160% (b/b) dari jumlah bahan baku. Produk dari reaksi xhantasi selanjutnya dianalisa Derajat Substitusi (DS) dan Derajat Polimerisasi (DP) pada range 0,36−0,39 dan 301−308. Selain Uji Derajat Substitusi (DS) dan Derajat Polimerisasi (DP), karakter dari selulosa xanthate juga dilakukan analisa menggunakan SEM dan FTIR. Karakterisasi tersebut ditujukan untuk mengetahui morfologi permukaan dan perubahan gugus fungsi selulosa xanthate pada berbagai variasi konsentrasi karbon disulfida (CS2). Hasil pengujian menunjukkan bahwa karbon disulfida (CS2) tersubstitusi ke dalam gugus OH pada selulosa bagas tebu, sehingga selulosa xanthate mampu mengadsorpsi logam berat Pb2+ dan Cu2+ dengan kapasitas adsorpsi masing-masing 50,7 mg/g dan 47 mg/g pada konsentrasi Karbon Disulfida (CS2) 120%.
EFEK SUHU PIROLISIS JERAMI PADI UNTUK PRODUKSI BIO-OIL MENGGUNAKAN REAKTOR BATCH Yeni Ria Wulandari; Fadian Farisan Silmi; Dewi Ermaya; Nita Pita Sari; Dedi Teguh
Jurnal Inovasi Teknik Kimia Vol 8, No 3 (2023)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v8i3.8441

Abstract

Jerami padi adalah limbah dari pasca panen tanaman padi dimana jerami padi dapat ditingkatkan nilai gunanya menjadi energi terbarukan dengan pirolisis. Pirolisis adalah proses dekomposisi ikatan karbon pada biomassa yang panjang menjadi lebih pendek dengan menggunakan energi panas suhu 300oC-600oC tanpa adanya oksigen. Penelitian ini dilakukan untuk mengetahui efek suhu pirolisis terhadap produk pirolisis(bio-oil, char, dan gas), kondisi optimum untuk menghasilkan bio-oil, dan kandungan senyawa kimia yang terdapat pada bio-oil. Pirolisis yang dilakukan pada penelitian ini pada temperatur 250, 300, 350, dan 400oC. Produk utama dari pirolisis adalah produk cair yang disebut dengan bio-oil. Gugus asam karboksilat menunjukkan intensitas gelombang paling tinggi dibandingkan dengan gelombang yang lainnya pada Analisa FTIR Jerami padi. Bio-oil terbanyak didapatkan pada suhu 300oC dan pada suhu 250oC didapatkan nilai pH terendah serta memiliki densitas tertinggi. Semakin tinggi suhu pirolisis maka produk gasnya semakin tinggi dan produk char semakin menurun. Berdasarkan Analisa GC-MS produk asam asetat memiliki % (persen) area tertinggi yaitu sekitar 49,45%.  Sehingga suhu optimum memproduksi bio-oil pada pirolisis jerami padi pada suhu 300oC dan untuk memproduksi char suhu optimum pada 250oC
Product Distribution of Chemical Product Using Catalytic Depolymerization of Lignin Damayanti Damayanti; Yeni Ria Wulandari; Ho-Shing Wu
Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 2 Year 2020 (August 2020)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.15.2.7249.432-453

Abstract

Lignin depolymerization is a very promising process which can generate value-added products from lignin raw materials. The main objective of lignin depolymerization is to convert the complex molecules of lignin into small molecules. Nevertheless, lignin is natural polymer which the molecules of lignin are extremely complicated due to their natural variability, and it will be a big challenge to depolymerize lignin, particularly high water yield. The various technology and methods are developed to depolymerize lignin into biofuels or bio chemical products including acid/base/metallic catalyzed lignin depolymerization, pyrolysis of lignin, hydroprocessing, and gasification. The distribution and yield of chemical products depend on the reaction operation condition, type of lignin and kind of catalyst. The reactor type, product distributions and specific chemicals (benzene, toluene, xylene, terephthalic acid) production of lignin depolymerization are intensive discussed in this review. Copyright © 2020 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Optimization and Characterization of Adsorbent from Palm Kernel Shell Waste Using H3PO4 Activator Herlambang, M. Julian; Ramandani, Adityas Agung; Cendekia, Devy; Alvita, Livia Rhea; Wulandari, Yeni Ria; Shintawati, Shintawati; Purnani, Mawar Siti; Efendi, Dimas Amirul Mukminin Nur
CHEESA: Chemical Engineering Research Articles Vol. 6 No. 2 (2023)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v6i2.15906.118-125

Abstract

Palm kernel shell is solid waste produced from the processing of crude palm oil (CPO). In this context, phosphoric acid (H3PO4) serves as an essential activator for producing an adsorbent with maximum micropore under operating conditions at a temperature of <450oC. Therefore, this study aimed to determine the optimal adsorbent condition of the palm kernel shell using H3PO4activator. The production process was optimized using Response Surface Methodology (RSM) and Central Composite Design (CCD) methods with activator concentration variations of 4%, 5%, and 6%, at activation times of 23 hours, 24 hours, and 25 hours, respectively. The quality of the adsorbent produced fulfilled SNI standard 06-3730-1995, characterized by water content of 1.001%, ash content of 5.767%, missing substance level of 18.932%, and fixed carbon content of 75.301%. Furthermore, this work effectively optimized the RSM and CCD adsorbent production process, achieving 4.785% variation in activator concentration and 24.679 hours activation time.
Optimasi Optimasi Minyak Daging Buah Pala dengan Response Surface Methodology (RSM): Optimasi Minyak Daging Buah Pala dengan Response Surface Methodology (RSM) Nirmagusitna, Dwi Eva; Putri Andini, Mutia Merry; Wulandari, Yeni Ria
Jurnal Penelitian Pertanian Terapan Vol 24 No 2 (2024)
Publisher : Politeknik Negeri Lampung.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jppt.v24i2.3428

Abstract

Nutmeg flesh is the largest part of the nutmeg (77.8%) and can be used to produce nutmeg oil. The purposa of study is to determine the approproate distillation temperature and time to produce optimal yield of nutmeg flesh oil, to determine variations in temperature and distillation time based on Response Surface Methodology (RSM) with the optimal percentage of nutmeg flesh oil yield and requirement SNI nutmeg oil and to determine the content chemical compound in nutmeg flesh oil. The study was conducted in two stages. The first stage, optimizing the distillation process using RSM with a Central Composite Design (CCD) design. The second stage, making nutmeg flesh oil. The best sample of nutmeg flesh oil is the distillation temperature and time (95ºC, 4.5 hours) with yield (0.73%), specific gravity (0.91 g/ml), refractive index (1.4932), and solubility in ethanol 90% (20.00%). The results of GC-MS analysis of nutmeg flesh oil showed that the myristicin content require the SNI (35.30%). The variations of distillation temperature and distillation time suggested by CCD Design is 95ºC for 5.5 hours with results, yield (0.71%), specific gravity (0.882 g/ml), refractive index (1.485), and solubility in ethanol 90% (16.67%). The results of the analysis require the quality standards of nutmeg oil (SNI 06-2388-2006).
Potensi Limbah Tandan Kosong Kelapa Sawit (TKKS) sebagai Bioenergi pada Produksi Bio-Oil dengan Metode Pirolisis: Efek Temperatur: Potential of Empty Fruit Bunches (EFB) Waste as Bioenergy to Produce Bio-Oil Using Pyrolysis Method: Temperature Effects Rezki, Amelia Sri; Wulandari, Yeni Ria; Alvita, Livia Rhea; Sari, Nita Pita
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol. 7 No. 1 (2023)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2023.007.01.04

Abstract

Indonesia memiliki banyak sumber daya biomassa seperti limbah Tandan Kosong Kelapa Sawit (TKKS) untuk alternatif bahan bakar. Limbah padat TKKS memiliki kandungan selulosa, hemiselulosa, dan lignin yang berpotensi menghasilkan beberapa produk melalui metode pirolisis. TKKS yang digunakan dari PT. Lambang Jaya, Lampung Selatan, Indonesia. Tujuan studi ini adalah karakterisasi bio-oil yang dihasilkan dari limbah TKKS serta mengetahui faktor yang mempengaruhi produksi bio-oil. Percobaan dilakukan pada variasi temperatur 300°C, 350°C, dan 400°C, dengan biomassa TKKS berukuran 1 mm dalam reaktor pirolisis. Studi karakteristik fisika-kimia bio-oil yang diperoleh pada penelitian ini yaitu yield bio-oil, pH, densitas, viskositas, dan heating rate. Studi Karakteristik pirolisis TKKS yang diperoleh pada penelitian ini adalah yield bio-oil antara 4,32-6,49%, yield asap cair 33,03%-37,44%, yield arang 33,33%-38,35%, dan yield gas 23,53%-26,91%. Hasil pH bio-oil bersifat asam karena memiliki pH antara 3,4-3,8, densitas bio-oil 1,146-1,296 g/ml, viskositas 18,443-20,860 cP serta heating rate 4,6-6,5 °C/menit yang dikategorikan dalam jenis pirolisis lambat karena dioperasikan pada temperatur rendah dan waktu tinggal ≥ 30 menit. Pengaruh temperatur pada yield bio-oil menunjukkan semakin tinggi temperatur proses yield bio-oil yang dihasilkan semakin tinggi. Melalui studi karakteristik yang dilakukan pada pirolisis TKKS produk yang dihasilkan menarik untuk dikembangkan pemanfaatannya dengan memperhatikan parameter proses yang berpengaruh.
Pengaruh Metode Pengarangan dan Ukuran Partikel Terhadap Kualitas Briket Cangkang Kelapa Sawit: Effect of Combustion Method and Particle Size on the Quality of Palm Shell Briquettes Shintawati, Shintawati; Ermaya, Dewi; Wulandari, Yeni Ria; Sukaryana, Yana; Fernando, Riki
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol. 8 No. 1 (2024)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2024.008.01.03

Abstract

Salah satu sumber energi terbarukan adalah biomassa. Biomassa merupakan bahan organik yang umumnya berasal dari tanaman. Briket bioarang merupakan bahan bakar padat dan berasal dari biomassa yang diarangkan terlebih dahulu. Penelitian ini bertujuan untuk mengkaji pengaruh metode pengarangan dan ukuran partikel terhadap kualitas briket.  Penelitian ini menggunakan metode pengarangan torefaksi pada suhu 200°C, 300°C dan pengarangan manual. Ukuran partikel arang divariasikan 20 dan 40 mesh. Parameter yang uji adalah kadar air, nilai kalor, kadar karbon terikat, kadar zat menguap, kadar abu, densitas dan laju pembakaran. Hasil penelitian menunjukkan tipe pengarangan torefaksi mampu meningkatkan kualitas briket melalui peningkatan nilai kalor, kadar karbon terikat dan menurunkan  kadar air serta zat menguap serta dihasilkannya produk asap cair sebanyak 48,5%. Kualitas briket hasil pengarangan torefaksi suhu 3000°C ukuran arang 20 mesh memenuhi mutu I SNI 01-6235-2000 dengan nilai kalor, kadar air masing-masing adalah 6841 kal/g, 3,52 % dan kadar karbon terikat, zat menguap, abu, densitas serta laju pembakaran masing-masing adalah 50,06%, 37,59%,  8,13%,  1,71 g/cm3, 0,076 g/menit
Co-Authors Aang Haryadi Afifah, Dian Ayu Aji, Salomo Pranata Alvita, Livia Rhea Amelia Sri Rezki Andika Wahyu Purnama Arief, Febrina Cendekia, Devy Dahlan, Astryd Viandila Damayanti Damayanti Dedi Teguh Dedi Teguh Dewi Agustina Iryani Dewi Ermaya Dewi Ermaya Dewi Ermaya Dewi Ermaya Efendi, Dimas Amirul Mukminin Nur Fadian Farisan Silmi Fernando, Riki Gelegar, Iyappateya Hamam, Luth Hamdani Hamdani Hamdi, Rafiqul Hanifah, Windia Herlambang, M. Julian Ho-Shing Wu Ismadi Raharjo Kurniawan, Dodi Lutfi Wahidatur Rizky Nirmagusitna, Dwi Eva Nita Pita Sari Nita Pita Sari Nurwijayanti Oktaf Rina Oktaviani , Lahara Purnani, Mawar Siti Putri Andini, Mutia Merry Putri, Cynthia Eka Ramandani, Adityas Agung Rezki, Amelia Sri Ricky Fernando Rizka Novi Sesanti Sari, Nita Pita Shintawati Shintawati Shintawati Shintawati Shintawati shintawati, shintawati Shintawati, Shitawati Sudibyo Sudibyo Sukma, Vinda Avri Suryaningtyas, Endang Palupi Teguh, Dedi Teguh, Dedi Variyana, Yeni Yana Sukaryana