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Zuchra Helwani
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Journal : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Penggunaan Na2O/Fly Ash Sebagai Katalis Pada Tahap Transesterifikasi Minyak Sawit Off-Grade Menjadi Biodiesel Jhon Fery Marihot Tua S; Zuchra Helwani; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Biodiesel production from the vegetable oil using homogenous catalyst has disadvantage in the product separation and negative environmental impact. Biodiesel synthesis from off-grade palm oil using Na2O/Fly ash solid base catalyst is good to simplify the separation process and the utilization of fly ash as palm oil mill waste tp support the Na2O basic site. Biodiesel production aims in this study is to see the influence of reaction temperature, molar ratio of methanol and oil and concentration of Na2O/fly ash towards biodiesel yield. The process was conducted through reaction of esterification and followed by transesterification reaction. Processing of the data in this study was conducted by response surface methodology (RSM) using Design Expert 7.0 program which is experimental design determined by central composite design (CCD) which consists of three variables. The highest result of biodiesel yield was 77,33% at 60oC reaction temperature, molar ratio of methanol : oil 8 : 1 and catalyst concentration of Na2O/fly ash 4%-w. Biodiesel characteristics like as density, kinematic viscosity, acid value and flash point has been appropriate by Indonesian biodiesel standard. The most significant process condition affecting the yield of biodiesel was catalyst concentration.Keywords: biodiesel, fly ash, off-grade palm oil, solid base catalyst
Organosolv Pulping Batang Sawit Bebas Pati Febryanto Febryanto; Zulfansyah Zulfansyah; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Oil palm trunk are solid waste with considerable potential and have not been used optimally. Oil palm trunk can be used as raw materials for fiber-based industries such as the pulp and paper industry, starch industry, and other timber industries. The objectives of this research is to obtain the characteristics of pulp (yield, alpha cellulose and lignin of pulp) and studied the effect of cooking time, temperature, and solid to liquid ratio on the pulp produced. Pulping was performed on a rocking digester with 30 grams of oil palm trunk powder starch free, formic acid as a solvent with reaction temperature (110 °C, 130°C and 150 °C), reaction time (60 minutes, 120 minutes and 180 minute), liquid-solid ratio (10:1 b/b) catalyst H2SO4 0,1% wt. The result showed yield pulp of = 32,78-38,99%, lignin pulp of = 7,22-9,22% and alpha cellulose of 92,46-94,85%. The cooking time and temperature has the most influence the characteristics and response of the pulp. Keywords : formic acid, oil palm trunk, organosolv pulping
Pemanfaatan Na2O/Fe3O4 Sebagai Katalis Pada Tahap Tansesterfikasi Sawit Off Grade Menjadi Biodiesel Trisuciati Syahwardini; Zuchra Helwani; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Off-grade palm oil is a source of vegetable oils that utilization is not maximized yet. It has ALB > 2% so must be process with esterification and transesterification. In general, biodiesel is produced through transesterification reactions using homogeneous catalysts. Homogeneous catalysts can be replaced with heterogeneous catalysts with easily separated and environmentally friendly. Waste iron powder can be used as catalyst support and provide metallic properties for separate product easily. This study aims to create a catalyst that has metallic properties and to study the transesterification reaction process conditions at transesterification process. Esterification process were reacted at 60 °C with time reaction 1 hour, molar ratio of methanol : oil of 12:1 and 1% H2SO4-w catalyst. The esterification reaction can reduce levels of ALB from 11.95% to 1.44%. Transesterification conducted with the molar ratio of methanol : oil in a row are 6:1, 8:1, and 10:1, the amount of catalyst modification 1% -w, 2%-w, 3% -w, a reaction temperature of 50 °C, 60 °C , 70 °C, and the reaction time 3 hours. Processing data using Response Surface Methodology (RSM), while the number of experiment are determined by Central Composite Design (CCD). Yield was resulted in ranging from 22.34% to 59.92%. The highest yield obtained at 60 °C with molar ratio of methanol : oil is 8:1 and the amount of catalyst Na2O/Fe3O4 2%-w.Keywords : biodiesel, heterogeneous catalyst, off-grade palm, rsm, transesterification.
Ekstraksi Tahap Tunggal Kalium Hidroksida Dari Abu Tandan Kosong Sawit Shinta Anggraini; Zulfansyah Zulfansyah; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The utilization from oil palm empty fruit bunches is still limited. One alternative to the utilization of oil palm empty fruit bunches is by extracting potassium hydroxide from the ashes of oil palm empty fruit bunches. This study aims to determine the effect of temperature and extraction time using the single-stage method on the yield of potassium hydroxide. The dry ash from oil palm empty fruit bunches is reashing in the furnace and sieved with a 200 mesh sieve then extracted using water as a solvent at a temperature of 70oC, 80oC, 9 oC and extraction time of 4, 5, 6 hours. Ash extraction of oil palm empty fruit bunches at 90oC and 6 hours resulted in a potassium hydroxide yield of 51.37%. The results showed that the yield of potassium hydroxide increased with increasing temperature and extraction time. Keywords: extraction, oil palm empty fruit bunch, potassium hydroxide, single-stage
Optimasi Pembuatan Tricalcium Phospate (TCP) Berpori Dengan Metode Protein Foaming-Starch Consolidation Menggunakan Analisa Response Surface Methodology (RSM) Adi Maulana Putra; Ahmad Fadli; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Porous Tricalcium phosphate is a material that can be used as bone substitute. Protein foaming-starch consolidation method is a technique to produce Porous Tricalcium Phosphate (TCP) using yolk as an agent to form pore. This research aims to know the influence of slurry composition and temperature rising rate of sintering on physical, chemical and mechanical properties of porous TCP and to conduct characterization porous TCP in accordance with standard as synthetic bone graft. This research was begun with mixing the TCP powder, starch, Darvan 821A and yolk. Slurry was stirred mechanically in speed of 150 rpm for 3 hours. Slurry was poured in mold and heated in oven with the temperature of 180°C for an hour. Then sample was released from mold and burnt at 600°C ended by sintering at 1100°C for an hour. The result was porous TCP with porousity of 73,7-79,30%, density of 0,65-0,83 g/cm3 and compressive strength of 1,88-2,4 Mpa. Significance level between variables can be seen from pvalue < 0,05 and lack of fit > 0,05 which show that model was corresponding toward the result. R2 obtained were Y1 = 89,68%, Y2 = 89,69%, Y3 = 89,06%. The most affecting factor significantly towards all the responses was dispersant addition that followed by starch addition and temperature rising rate of sintering. In optimum condition (dispersant addition of 8,09 gr with starch addition of 9 gr and temperature rising rate of sintering of 1°C/minute) was obtained the optimum value of response for porosity by 75,7378%, density by 0,76gr/cm3 and compressive strength 2,16 Mpa.Keywords : tricalcium phophate, yolk, porosity, density, compressive strength
Sintesis Kulit Telur Ayam/Serbuk Besi Menjadi Katalis Cao/Serbuk Besi Untuk Reaksi Transesterifikasi Minyak Sawit Off Grade Menjadi Biodiesel Gusti Ayu Nurjanah; Zuchra Helwani; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Heterogeneous solid base catalyst by modificated Eggshells through calcination, hydration, dehydration methods with iron powder through impregnation method to load calcium oxide with eggshells as precursor. The catalyst with the highest activity is obtained when the calcination temperature of 900°C and the calcination time of 2 hours under transesterification reaction conditions of a molar ratio of methanol/oil 10:1, catalyst dosage of 1% by weight, temperature of 70 °C for 2 hours with yield biodiesel results reached 91,72%.Keyword: biodiesel, calcination, calcium oxide, catalysts, iron powder.
Pembuatan Briket Dari Produk Torefaksi Pelepah Sawit Ramdhani Asywal; Zuchra Helwani; Warman Fatra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Palm frond is biomass that has not been widely used as a renewable energy source. Torrefaction is a pretreatment process to improve the quality of the biomass as solid fuel. The aims of this research was to made briquette from palm frond which appropriate with SNI, and then to determined the effects of particle size, pressure and filler composition on response toward calorific value and pressure using Responce Surface Methodology (RSM). Palm frond uses sieve 60, 80 and 100 mesh. Pressure 100, 110 and 120 kg/cm2, and tapioca adhesive composition 10, 20 and 30%-wt. The highest calorific value was 3989,05 cal/g which obtained at 100 mesh of particle size, pressure 120 kg/cm2, and filler compostion 10%-wt. The highest pressure was 8,92759 kg/cm2 which obtained at 100 mesh of particle size, pressure 120 kg/cm2 and filler composition 30%-wt. Process conditions is very influence significantly on the calorific value and compressive strength is the composition of the adhesive and the pressing pressure. Keywords : Briquette, Torrefaction, Responce Surface Methodology, Calorific Value, Renewable Energy
Esterifikasi Gliserol Sebagai Produk Samping Biodiesel Menjadi Triacetin Dengan Menggunakan Katalis Zeolit Alam Pada Variasi Suhu Reaksi Dan Konsentrasi Katalis Dedi Meier Silaban; Zuchra Helwani; Silvia Reni Yenti
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Glycerol is by-product of biodiesel. Production of biodiesel will produce glycerol about 10% of total biodiesel. The excess glycerol able to treatment to a more expensive product, such as triacetin. Triacetin is a triester from glycerol and acetic acid. It is used as good additive and also soluble in biodiesel. Triacetin was produced by esterification of glycerol and acetic acid. The aim of this research was to know the influence of the concentration of catalyst and esterification temperature reaction toward glycerol conversion. Esterification of glycerol was done by activated natural zeolite catalyst. The molar ratio of glycerol and acetic acid was 1:7. The temperature that used was 90oC, 100oC, and 110oC, than the concentration of zeolite catalyst was 2%, 4%, and 6% of acetic acid mass. The highest glycerol conversion was 85,21% that reached in reaction temperature 110oC and catalyst concentration 4% of acetic acid mass. The temperature and catalyst concentration of esterification was directly proportional of the glycerol conversion.Key words: Biodiesel, esterification, glycerol, triacetin, zeolite.
Torefaksi Pelepah Sawit : Pengaruh Kondisi Proses Terhadap Nilai Kalor Produk Torefaksi Wenny Susanty; Zuchra Helwani; Zulfansyah Zulfansyah
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Palm frond is biomass that has not been widely used as a renewable energy source. Torrefaction is a pretreatment process to improve the quality of the biomass as solid fuel. The aim of this research was to determine the condition of the process to the increase in calorific value torrefaction product. Results of the research is the calorific value and the proximate analysis torrefaction products such as moisture content, ash content, volatile content, and the content of fixed carbon. Torrefaction product calorific value in the range 17.700-19.800 kJ/kg.Key words: biomass, oil palm frond, renewable energy, solid fuel, torrefaction,
Sintesis Kulit Telur Ayam/Fly Ash Menjadi Katalis Cao/Fly Ash Untuk Reaksi Transesterifikasi Minyak Sawit Off Grade Menjadi Biodiesel Desly Fadilla Simbolon; Zuchra Helwani; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Heterogeneous solid base catalyst by modificated Eggshells through calcination, hydration, dehydration methods with iron powder through impregnation method to load calcium oxide with eggshells as precursor. The catalyst with the highest activity is obtained when the calcination temperature of 900°C and the calcination time of 3 hours under transesterification reaction conditions of a molar ratio of methanol/oil 6:1, catalyst dosage of 6% by weight, temperature of 70 °C for 2 hours with yield biodiesel results reached 86.20%.Keyword: biodiesel, calcination, calcium oxide, catalysts, iron powder.
Co-Authors Abdullah Syafi’i Adi Maulana Putra Ahmad Fadli Al Qohyum Fernando Andi Mulya Adha Andreas Sahat Parsaulian Andry Sutanto Anna Apryana Ari Wibowo Harahap Arief Maulana Ilham Arini Puspita Ramadhanti Ayu Naluri Bahruddin Bettry Rifani Dedi Meier Silaban Delvi Yolanda Desi Ivo Andri Ari Desly Fadilla Simbolon Dwi Yuni Ernawati Edi Susanto Edy Saputra Eferius Mendrofa Febrian Adhitya Febryanto Febryanto Firman Tampubolon Fitra Annisa Ganis Kharisma Wiranti Gusti Ayu Nurjanah Hari Rionaldo Heriza Saputri Heru Kristianto Holyness Nurdin Singadimedja Ida Zahrina Jhon Fery Marihot Tua S Jimmy Anderson Khairat Khairat Komalasari Komalasari M. Wahyu Nugraha Mery Christina Mia Afriyenti Mohd Fajri Amrullah Monika Shecilia Muh. Fadlan Alfuadi Muhammad Gus Iqbal Al-Pakningi Muhammad Rahman Muhammad Rifki Aulia Rahman Mustapa Ardi Nirmala Sari Nur Khairiati Qurotullaili Qurotullaili Ramdhani Asywal Ricfan Anggriawan Rina Maryenti Rio Nanda Novendra Rivo Fernando Romie Jhonnerie Romy Romy Rozanna Sri Irianty Sherly Oktarizona, Shinta Anggraini Silvia Reni Yenti Solly Aryza Sri Helianty Syafrima Wahyu SYAIFUL BAHRI Trisuciati Syahwardini Triyana Defi Vandhe Melsa Sembiring Viqrie Wahyudi Walter Valentino Sinaga Warman Fatra, Warman Wenny Susanty Widya Yoesepha Yelmida Azis Z Zulfansyah Zultiniar Zultiniar