Kusmiyati Kusmiyati

Universitas Dian Nuswantoro Semarang · Computer Engineering

The rapid growth and development of industries in the world result in a greater energy needs. Some studies show that ethanol can be used as an alternative energy. However, bioethanol production from food raw materials such as sugar and starch has drawback that cause the food crisis. This aim of this study was to convert banana stem into bioethanol....

Development of alternative energy is needed to solve the energy problem, including bioethanol. Banana pseudo-stem is a lignocellulose material that can used to produce bioethanol. Banana pseudo-stem has 28.83% cellulose and 19.39% lignin. The amount of lignin will reduce by pretreatment process. Variations of pretreatment methods by autoclaving of...

Starch-Free Sugar Palm Trunk (Arenga pinnata) can be utilized to produce bioethanol because of their high lignocellulosic contents. Production of bioethanol from lignocellulosic materials consist of pre-treatment, saccharification and fermentation processes. In this work, conversion of starch-free sugar palm trunk (Arenga pinnata) to fermentable su...

Minyak nabati dapat dikembangkan menjadi sumber energy alternatif pengganti bahan bakar berasal dari minyak umi dan gas alam. Reaksi metanolisis minyak biji kapuk dapat menghasilkan ester asam lemak dan gliserol. Metal ester asam lemak adalah bahan yang sangat potensial sebagai pengganti bahan bakar disel. Percobaan metanolisis minyak bbiji kapuk d...

Batik is one of the textile industries which is growing very rapidly in Indonesia. However, the large amount of waste water produced is still a major problem of this industry. Adsorption processes are still an effective technology to treat the waste, especially in removing coloring agent. However, the study of adsorption kinetics and the use of coa...

Removal of vertigo blue dye from batik textile wastewater was studied by adsorptionprocess onto activated carbon (AC) and coal bottom ash (CBA).The influence of experimental conditions (pH solution, dye concentration, and contact time) were studied on the both adsorbents. At equilibrium conditions, the data were fitted to Langmuir and Freundlich ad...

Due to the depletion of fossil oil sources, Indonesia attempts to search new source of bioenergy including bioethanol. One of this sources is Iles-iles tubers (Amorphophallus campanulatus), which is abundantly available in Java Indonesia. The carbohydrate content in Iles-Iles tuber flour was 77% and it can be converted to ethanol by three consecuti...

Waste Fish oil was used as raw material for biodiesel production. Two stage process, esterification and transesterification were applied to convert waste fish oil to biodiesel. An acid catalyst (H2SO4) and alkaline catalyst were used for catalysts of the esterification and transesterification, respectively. Fish oil, methanol or ethanol, and cataly...

Fuel grade bioethanol production as an alternative fuel is desirable to substitute fossil fuel as diminishing energy source from petroleum. Bioethanol production from Iles-iles (Amorphophaluscampanulatus) tuber as alternative fuel has been conducted by hydrolysis followed by fermentation. The purification of bioethanol product was performed by dist...

An increased of human need that spend a lot of energy, especially fuel resulting in excessive energy consumption. Therefore, the existence of alternative energy that renewable and environmentally friendly, such as bioethanol is required. In this study the use of sorghum and iles-iles as raw materials for bioethanol production were investigated. The...

Bioethanol produced from agricultural sources is one alternative energy that has been developed to substitute for petroleum. However, the use of food sources such ascorn and cassava to produce bioethanol still face obstacles that lead to the scarcity of food and an increase in food prices. The aim of this study was to produce bioethanol from sorghu...

The decrease in production and the raise in needs have led to the rise in oil prices. This work investigated the possibility of Ilesiles (Amorphophallus campanulatus) tuber flour, which is rich in carbohydrate content, as a raw material to produce bioethanol. To obtain the maximum ethanol concentration, several parameters had been studied, such as:...

Kebutuhan bahan bakar di masa sekarang semakin bertambah besar sehingga berdampak pada menipisnya sumber bahan bakar dan meningkatnya polusi udara di lingkungan. Penggunaan bahan bakar alternatif dari sumber non fosil merupakan pilihan terbaik sebagai pengganti bahan bakar fosil. Bioetanol merupakan salah satu energi alternatif yang tepat digunakan...

The aims of this study were to convert the starches from iles-iles tubers (Amorphophalus campanulatus) and sorghum grains (Sorghum bicolor L) into bioethanol as an alternative energy. Both of these agricultural products contains a high content starches and they do not use as the major foods in Indonesia. To find out the maximum ethanol concentratio...

UTILIZATION OF CHAR COAL ACTIVATED CARBON (CCAB) FOR HEAVY IONS (Cu2+ AND Ag+) REDUCTION FROM INDUSTRIAL WASTE WATER. Industrial wastewater may contain heavy metals such as Cu and Ag those are harmful to the environment if discharged without pretreatment. One of the methods to reduce heavy metals in wastewater is adsorption, to separate certain com...

Biodiesel is an alternative diesel fuel that is produced from vegetable oils and animal fats. Generally, it is formed by trans etherification reaction of triglycerides in the vegetable oil or animal fat with an alcohol. In this work, etherification reaction was carried out using oleic acid, methanol and sulphuric acid as a catalyst by reactive dist...

Curcuma mangga contains a lot of variety of active compound which use as traditional medicines. This research aimed to isolated and determinated the active compound of methanol extract Curcuma mangga rhizomes of ethyl acetate fraction and its rendemen. Amount of 1000 g Curcuma mangga rhizomes was macerated with methanol solvent at room temperature...

Dehydroaromatization of methane (DHAM) under non oxidative condition was studied over tungsten loaded HZSM-5 catalysts to produce aromatic hydrocarbons. The catalysts were prepared by impregnation method using different conditions: in neutral and acidified solution. The activity of W/HZSM-5 prepared by neutral solution and W-H2SO4/HZSM-5 prepared i...

Fries Rearrangement of eugenyl acetate in order to study allilic substituent group influence has been done. Fries rearrangement of eugenyl acetate was done by heating at 120°C for 3 hours under AlCl3, dichloromethane as the catalyst and solvent, respectively. The structure of the compound was identified using Infra Red spectrometry (IR) and GC-MS....

Biodiesel is an alternative diesel fuel that is produced from vegetable oils and animal fats. Generally, it is formed by transesterification reaction of triglycerides in the vegetable oil or animal fat with an alcohol. In this work, esterification reaction was carried out using oleic acid, methanol and sulphuric acid as a catalyst by reactive disti...

Biodiesel is an alternative diesel fuel that is produced from vegetable oils and animal fats. Generally, it is formed by transesterification reaction of triglycerides in the vegetable oil or animal fat with an alcohol. In this work, esterification reaction was carried out using oleic acid, methanol and sulphuric acid as a catalyst by reactive disti...

Dehydroaromatization of methane (DHAM) under non oxidative condition was studied over tungstenloaded HZSM-5 catalysts to produce aromatic hydrocarbons. The catalysts were prepared by impregnationmethod using different conditions : in neutral and acidified solution. The activity of W/HZSM-5 prepared byneutral solution and W-H2SO4/HZSM-5 prepared in...

The catalytic conversion of a methane and ethylene mixture to gasoline range hydrocarbons has been studied over W/HZSM-5 catalyst. The effect of process variables, such as temperature, percentage of volume of ethylene in the methane stream and catalyst loading on the distribution of hydrocarbons was studied. The reaction was conducted in a fixed-be...

The screening of a series of W-based catalysts on different supports i.e. HZSM-5, Hß, USY and Al2O3 for the dehydroaromatization of methane (DHAM) revealed that HZSM-5 emerged as the best support. Next, the performance of W/HZSM-5 and W-H2SO4/HZSM-5 catalysts for the DHAM reaction was compared to study the effect of acidic treatment in the impregna...

The dehydroaramatization of methane over W-supported ZSM-5 with varying degrees of Li+ ion-exchanged catalysts was studied with and without oxygen at 1073 K and atmospheric pressure. Catalyst activity and stability were found to be influenced by the catalyst acidity related to Bronsted acid sites and by the presence of oxygen in the feed. The NH3-T...

Abstrak Percobaan adsorpsi ini memanfaatkan karbon aktif arang batubara (KAAB)sebagai adsorbennya, yang mana KAAB telah diaktivasi dengan H 2 O 2 selama kurang lebih satu jam.Dengan tujuan untuk mempelajari pengaruh dari parameter proses seperti konsentrasi zat warna yang digunakan yaitu Orange DNA 13 yang mana mempunyai berat molekul 696,1 g/mol d...

Abstrak Adsorpsi atau penjerapan dapat digunakan untuk pengolahan limbah cair, misanyai limbah cair yang berasal dari proses pewarnaan dan pencelupan pada industri tekstil. Untuk menentukan efisiensi adsorpsi dibutuhkan model kinetika dan kesetimbangan adsorpsi. Untuk penelitian ini digunakan zat warna Vertigo Blue 49 yang dapat mewakili limbah tek...