Rekayasa Bahan Alam dan Energi Berkelanjutan最新文献_第3页

Biodiesel Production from Waste Coocking Oil with CaO Heterogeneous Catalyst from Egg Shell 蛋壳CaO非均相催化剂催化废食用油制备生物柴油

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2021-06-28 DOI: 10.21776/ub.rbaet.2021.005.01.04

A. S. Suryandari, Zainur Risky Ardiansyah, Vemmy Nurmala Andhani Putri, Ilham Arfiansyah, A. Mustain, H. Dewajani, Mufid Mufid

{"title":"Biodiesel Production from Waste Coocking Oil with CaO Heterogeneous Catalyst from Egg Shell","authors":"A. S. Suryandari, Zainur Risky Ardiansyah, Vemmy Nurmala Andhani Putri, Ilham Arfiansyah, A. Mustain, H. Dewajani, Mufid Mufid","doi":"10.21776/ub.rbaet.2021.005.01.04","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2021.005.01.04","url":null,"abstract":"Nowadays, the substitute for biofuel diesel fuel is biodiesel. Waste cooking oil has the potential as a biodiesel feedstock due to its environmentally friendly, inexpensive, reduces household waste and does not compete with food needs. Generally, the catalyst used in biodiesel is a homogeneous catalyst but has disadvantages. One effort that can be done is to use CaO catalyst from eggshell waste. Eggshells contain 95,28% CaCO3 which can be calcined to produce CaO. In this research, production of biodiesel is done by using waste cooking oil and CaO catalyst from eggshells with various variables to determine the best calcination conditions in the preparation of the catalyst. The eggshells were calcined at variable temperatures (600,700,800 and 900°C) during the time variables (2,3,4 and 5 hours). The operating conditions in the transesterification reaction were at 60°C for 2hours with a stirring speed of 700rpm and a mole ratio of oil and methanol of 1:12. The results obtained, the best calcination conditions in producing CaO catalysts were at a temperature of 900°C for 2 hours with 75.90% mass recovery. In addition, the transesterification reaction using the best catalyst achieved yield of FAME 64,56% with a density of 0.8573 gr/mL and a viscosity of 7.18 cSt.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128928106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interesterification Process of Palm Oil Into Biodiesel with Co-solvent Methyl Esters 棕榈油与助溶剂甲酯酯化制备生物柴油的研究

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2020-07-23 DOI: 10.21776/ub.rbaet.2020.004.01.01

Elvianto Dwi daryono

{"title":"Interesterification Process of Palm Oil Into Biodiesel with Co-solvent Methyl Esters","authors":"Elvianto Dwi daryono","doi":"10.21776/ub.rbaet.2020.004.01.01","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2020.004.01.01","url":null,"abstract":"One alternative energy that is currently being developed is fatty acid methyl ester (FAME), commonly known as biodiesel. The process of making biodiesel which has so far been carried out is a process of transesterification with alcohol where the byproduct produced is glycerol. Glycerol must be completely separated from biodiesel since it will interfere with engine performance. The method used to produce biodiesel in this study was interesterification. In the interesterification reaction, vegetable oil is reacted with methyl acetate instead of methyl alcohol, which results in triacetin byproduct. Separation of the remaining triacetin from biodiesel is not necessary since it is useful as an additive to biodiesel. To increase the solubility of the reactants, a co-solvent methyl ester is a good choice since it is a reaction product itself. Hence, it does not need a separation process. The operating conditions of the study were reaction temperature 60⁰C, molar ratio of palm oil:methyl acetate = 1:6, reaction time 1 hour, co-solvent mass of 15% oil mass, KOH catalyst mass (0; 0.25; 0.5; 0.75 1% mass of oil) and stirring speed (600,800,1000 rpm). The results demonstrated that the optimum concentration of biodiesel was 4.80%, obtained at a catalyst mass of 0.5% at a stirring speed of 600 rpm. The optimum yield of 5.56% was obtained at a catalyst mass of 0.5% and a stirring speed of 600 rpm. It can be concluded that the optimum condition of the research were: the catalyst mass 0.5%, stirring speed 600 rpm, reaction temperature 60⁰C, reaction time 1 hour, and molar ratio of oil:methyl acetate were 1:6, respectively.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127704868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Chitosan Addition on Characteristics of Biodegradable Plastic from Waste of Nata de Coco using Inversion Phase 壳聚糖添加对椰果废渣降解塑料性能的影响

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2020-07-23 DOI: 10.21776/ub.rbaet.2020.004.01.02

Kholisoh Hayati, Claudia Candra Setyaningrum, S. Fatimah

{"title":"The Effect of Chitosan Addition on Characteristics of Biodegradable Plastic from Waste of Nata de Coco using Inversion Phase","authors":"Kholisoh Hayati, Claudia Candra Setyaningrum, S. Fatimah","doi":"10.21776/ub.rbaet.2020.004.01.02","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2020.004.01.02","url":null,"abstract":"Exploration of biodegradable plastic material will solve pollution problem. The side product of nata de coco is potential to be proceed as biodegradable plastic due to its cellulose content, up to 42.57%. This research meant to learned the effect of chitosan addition for the making of biodegradable plastic from waste of nata de coco. The inversion phase was used in this study to produce bioplastics then several physical tests, FTIR, and biodegradability examination conducted to evaluate its mechanical properties. This study used complete randomized design combined with factorial design. The bioplastic product was manufactured using cellulose of nata de coco in three variation, 2.00; 2.50; 3.00 gram combined with 3 variation of chitosan, 2.50; 3.00; 3.50 gram. Statistical analysis of all quantitative data was conducted by using Multiple analysis of variance (MANOVA) (p<0.05) using the SPSS-25 program. Based on the result of the research, the value of mechanical properties there is an optimal tensile strength of bioplastics was 4,22 Mpa and elongation was 3,28%. An optimal water resistance value of bioplastics was 70,93%. FTIR result indicate that synthesized bioplastics have a wavelength value similar to the constituent raw material and biodegradability result obtained 80 - 100 %.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134017382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Renewable Energy on Islands: Lessons for Indonesia to Apply 岛屿上的可再生能源:供印度尼西亚应用的经验教训

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2020-07-23 DOI: 10.21776/ub.rbaet.2020.004.01.04

Faizal Rianto, D. Utari, Billy Jenawi, Riau Sujarwani

{"title":"Renewable Energy on Islands: Lessons for Indonesia to Apply","authors":"Faizal Rianto, D. Utari, Billy Jenawi, Riau Sujarwani","doi":"10.21776/ub.rbaet.2020.004.01.04","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2020.004.01.04","url":null,"abstract":"The purpose of this article is to review and analyse the development of applied renewable energy in Indonesia. Indonesia has achieved 91.16% electrification rate in 2016, and in 2024 planned to achieve 100% electrification for its population. Lack of electricity access, however, is common throughout Indonesia. Provinces in eastern Indonesia such as Nusa Tenggara Timur and Papua Barat has the lowest electrification ratio, while provinces such as Nusa Tenggara Barat, Sulawesi Tenggara, Kalimantan Tengah, Kalimantan Utara, and Kepulauan Riau has less than 80% electrification rate. Out of the 34 provinces, only Bangka Belitung, Jawa Barat, and Jakarta have the electrification ratio above 99% in 2016. Providing electricity access to the population is proven to be difficult due to Indonesia’s archipelagic geography which acted as a barrier and poses a challenge in electrification efforts. Studies, however, have shown the potential use and application of renewable energy to provide electricity to islands and archipelagos. It is therefore important for Indonesia to take note that renewable energy initiatives, particularly on islands and archipelagos, are not only yielding positive results socially, economically, and environmentally, but it is also viable and feasible to implement.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126039898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Kinetic model of biogas production from food waste 利用食物垃圾生产沼气的动力学模型

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2020-07-23 DOI: 10.21776/ub.rbaet.2020.004.01.03

L. Shitophyta

引用次数: 0

Oil Extraction of Skeletonema costatum Microalgae with the Assistance of Ultrasonic Waves 超声辅助提取腰骨藻微藻油脂的研究

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2019-04-29 DOI: 10.21776/ub.rbaet.2019.003.01.01

W. D. P. Rengga, Ade Bintang Prayoga, Agus Asnafi, B. Triwibowo

引用次数: 0

Influence of Temperature and Pressure on the Evaporation of 6-Aminopenicillinic Acid 温度和压力对6-氨基青霉素酸蒸发的影响

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2019-04-29 DOI: 10.21776/ub.rbaet.2019.003.01.03

L. Aliwarga, Widhi Setyo Kusumo, Agung Pramono

{"title":"Influence of Temperature and Pressure on the Evaporation of 6-Aminopenicillinic Acid","authors":"L. Aliwarga, Widhi Setyo Kusumo, Agung Pramono","doi":"10.21776/ub.rbaet.2019.003.01.03","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2019.003.01.03","url":null,"abstract":"6-aminopenicillinic acid (6-APA) is the raw materials for producing semi-synthetic penicillin. In commercial scale, penicillin G is conversed into 6-APA enzymatically by penicillin acylase. Due to the nature of equilibrium reaction, the products are in mixture solution of penicillin G, 6-APA, and phenil acetic acid (PAA). In order to purify the targetted 6-APA, steps of evaporation, crystallisation, and drying are thereby compulsory. In this research, the optimum operation conditions for model solution evaporation were observed. Operation variables, like temperature was varied in the range between 30-65°C at -100mmHg, and pressure was also set between -300 and -50mmHg at constant temperature of 50°C. The results showed that temperature is a dominant factor determining the yield of 6-APA, compared to vacuum pressure from -300 mmHg to -50 mmHg that provided similar yield value. This fact was supported by interpretation of the crystal’s purity for the pressure variation that overall was more than 90% (suggested the homogeneity and higher 6-APA content); hence, operation in each pressure for that range is feasible. To conclude, at 50°C and evaporation pressure of -100mmHg, the highest 6-APA yield and total yield of 97.46% and 91.76%, respectively, were attained.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130088383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance Study of Silica-based Hydrofobic membranes in Biodiesel Purification Process 硅基疏水膜在生物柴油净化过程中的性能研究

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2019-04-29 DOI: 10.21776/ub.rbaet.2019.003.01.04

R. Oktavian, B. Poerwadi, S. Supriyono, C. W. Kartikowati, Hardo Triwahyu Septiadi, Muhammad Ichya` Yuniardi

{"title":"Performance Study of Silica-based Hydrofobic membranes in Biodiesel Purification Process","authors":"R. Oktavian, B. Poerwadi, S. Supriyono, C. W. Kartikowati, Hardo Triwahyu Septiadi, Muhammad Ichya` Yuniardi","doi":"10.21776/ub.rbaet.2019.003.01.04","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2019.003.01.04","url":null,"abstract":"Glycerol can cause negative effects on diesel engines such as fuel filter blockage, fouling on fuel injectors and deposit formation at the bottom of the storage tank, it is necessary to do purification to improve the quality of biodiesel in accordance with SNI. Until now, the separation process has been carried out by using a polypropylene hydrophobic polymer membrane. Therefore, another membrane alternative is needed for the refining process of biodiesel production derived from materials that are easy to obtain and of economic value. In this research, the synthesis process of hydrophobic silica composite membrane and the performance of this membrane were carried out in the process of separating FAME with glycerol. This study examines the performance of the hydrophobic silica composite membrane on biodiesel purification for improving the quality of biodiesel resulting from the transesterification process. The results showed that membrane synthesis in this study could produce a hydrophobic membrane with a contact angle above 90 ° (150 °). This hydrophobic membrane can be used in the process of separating CPO-water with a rejection coefficient of 0.99. In addition, from the test results with a flow rate of 3 ml / minute, it was found that this membrane was able to improve the quality of crude biodiesel seen from the parameters of its heating value. In addition, membrane fluxes were 8.1 L / m2.h.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124094760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Microwave Assisted Transesterification Reaction Kinetics of Biodiesel from Jatropha Oil 微波辅助麻疯树油生物柴油酯交换反应动力学研究

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2019-04-29 DOI: 10.21776/ub.rbaet.2019.003.01.02

B. Poerwadi, B. Ismuyanto, A. Rosyadi, Ayub Wibowo

引用次数: 0

Conversion of Sugarcane Bagasse into Biochar and Activated Carbon for Cr(VI) Removal 蔗渣转化为生物炭和活性炭去除Cr(VI)的研究

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2018-07-28 DOI: 10.21776/ub.rbaet.2018.002.01.02

Borneo Satria Pratama, Putri Aldriana, B. Ismuyanto, A. Hidayati

{"title":"Conversion of Sugarcane Bagasse into Biochar and Activated Carbon for Cr(VI) Removal","authors":"Borneo Satria Pratama, Putri Aldriana, B. Ismuyanto, A. Hidayati","doi":"10.21776/ub.rbaet.2018.002.01.02","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2018.002.01.02","url":null,"abstract":"Sugarcane bagasse is the residue of sugar cane milling process. Its value can be optimized as an alternative technology for the manufacturing of activated carbon, which can be used as adsorbent to remove Cr(VI) from wastewater. This study aims to determine the effect of carbonization temperature on the characteristics of biochar bagasse as well as the effect of activation with KOH solution. Carbonization process carried out at 400, 450, 500, 550 and 600°C in a fixed-bed reactor and flowed by nitrogen gas (N2) at constant rate for 2 hours. Activated carbon is produced through the activation process of biochar obtained from bagasse carbonization process at 600°C, by soaking the biochar in 25 mL potassium hydroxide (KOH) 4 M solution at room temperature for 24 hours. The characteristics obtained show that higher the carbonization temperature could produce biochar with larger surface area and higher ash content. The activation process of biochar using KOH could produce activated carbon which has the largest surface area (1259.048 m2/g) and could reduce the ash content. The surface area of the adsorbent has effect on its ability of Cr(VI) adsorption from the solution.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123721014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0