Adsorption of Hydrogen Sulphide on the Zeolite type A Synthezied from Iraqi Kaoline

Three types of zeolite A were prepared from Iraqi kaoline which are 3A, 4A and 5A by ion exchange method .They were characterized by XRD and atomic absorption techniques .They were used as adsorbents to examine their applicability for H2S adsorption .The adsorption process was performed in a static form and constant volume system which constructed from stainless steel .The effect of zeolite type and temperature on the adsorption properties of H2S at -5 , 25 and 55 oC was studied .The zeolite type 5A has the highest adsorption value (79.384 µmol/g ) and the three types may be arranged in a sequence toward H2S adsorption as 5 A> 4A>3A .The amount of H2S adsorbed increased as temperature decreased from 55 to -5 for all samples. Langmuir , Frendlich and Toth isotherm equations model were applied for the adsorption data in order to determine the affinity and the heterogeneity of the three adsorbents. The heterogeneity parameters of the model equation applied indicated that 5A sample was more heterogeneous compared to other zeolite types

Preparation and Characterization of Bimetallic Catalyst (NiO – CoO) for Desulfurization of Gas Oil

In this study NiO - CoO bimetallic catalysts are prepared with two Ni/Co ratios (70:30 and 80: 20) using the precipitation method of nitrate salts. The effects of Ni /Co ratio and preparation methods on the catalyst are analyzed by using different characterization techniques, i.e. atomic absorption (AA) , XRD, surface area and pore volume measurements according to the BET method . The results indicate that the best catalyst is the one containing the percentage of Ni :Co ( 70 : 30 ). Experiments indicate that the optimal conditions to prepare catalyst are stirring for three hours at a temperature of 60oC of the preparation , pH= (8-9) , calcination temperature at 400oC for two hours using the impregnation method . The catalyst activity is studied through the application in the process of oxidative desulfurization of gas oil fuel . The optimal conditions for deep oxidative desulfurization processes are : catalysts 3% , 2 gm. Na2 CO3 , refluxe time 3 hours at 400 C , using a mechanical stirrer at moderate speed (700 rpm), the volume ratio of gas oil : H2O2 : acetic acid is 10: 1: 0.5 and extracted with 1:1 ratio of acetonitrile to the gas oil for three times . The results indicate that the catalysts are efficient to remove sulfur from gas oil depending on temperature, time, concentration of hydrogen peroxide H2O2 30 % and solvent used for extraction. The efficiency of the best catalyst gives a maximum sulfur removal reaching 68.97%

The synergistic effect of Zeolites type (?) with chlorinated rubber as flame retardants for unsaturated polyester resin

In this work, the synergistic effect of chlorinated rubber (additive I),with zeolite 3A (additive II), zeolite 4A (additive III), and zeolite 5A (additive IV) in (1:1) weight percentage, on the flammability for unsaturated polyester resin was studied in the weight ratios for (3,7,10,13&15%) by preparing films of (130×130×3) mm in diameters. Three standard test methods used to measure were the flame retardation which are; ASTM: D-2863, ASTM: D- 635& ASTM: D-3014. Results obtained from these tests indicated that all of the additives were effective additive IV has the highest efficiency as a flame retardant

Coffee Shop Di Kota Pekanbaru (Kajian Kasus)

Urban community is a modern society. A developing urban society always creating an innovation as a city facilty. Coffee shop is a facilty which created by a new change caused by life style in city, its context was different from an usual coffee shop dan only found in cities. As a city facility, coffee shop can be enjoyed by anyone from any commnunity in a city, starting those from high class, middle class, and even still affordable by low class community. Because of this different context of a coffee shop made a coffee shop worth to be enjoyed by people of the cities, basically this kind of coffee shop sell different services, from facility, atmosphere, and extraordinary product from an ordinary coffee shop. Because of the nature of urban community, they tend to have an open mind so they would like to try new things and new people, primarily in coffee shop. The increasingly growth phenomenon of Coffee Shop in Pekanbaru city is the purpose of this research. Theory used in this research is urban growth and modernizations theory. In this research, there are six sources, those who become source for this research are customers who enjoy coffee shop facilities which basically grouped as coffee lovers and people who only following the trends of coffee shop. Research data mining in this research are done by interviews, observation, and documentation. Interviews done in this research are structured interviews where researcher prepared an interview handbook. According to past research, it can be concluded that in Pekanbaru city, customs of visiting coffee shop made this activity as daily routines such as visiting every day even more than once or twice a day to release fatigue from daily activity in the city, this is innovation from new lifestyle of grwoing urban society

Prediction of braid pattern on mandrels with constant non-circular cross-sections

In this study, a new useful mathematical model has been developed to predict the braid pattern for every point onto themandrel surface with non-circular cross-sections. The Reza-Jalil-Mohammad (RJM) equation thus obtained has beenproposed for the braid angle. The implementation and validation of this mathematical model has been discussed for acylindrical mandrel. It is observed that using RJM equation, one can get the arrangement of strands in circular braidingmachine for each mandrel with different cross-sections

The Ubiquitous Technology Model: The Use among Students at Malaysian Technical University Networks (MTUN)

Laptops, smartphones and tablets which also known as a ubiquitous technology or U-Tech have been widely used by many students in the university. However, little is known about the factors influencing its usage as not many comprehensive studies have been done related to it. A review of related literature demonstrates that factors, namely the Technology Competency (TC), Performance Expectancy (PE), Effort Expectancy (EE), Behavioural Intention (BI), Facilitating Conditions (FC) and Social Status (SS) influence technology usage. The focus of this study was to confirm whether these factors contribute towards the U-tech usage among students in the Malaysian Technical Universities Network (MTUN). This study was based on a quantitative research in which the Structural Equation Modeling using AMOS was employed. The research instrument was in the form of a questionnaire. The reliability of the instrument ranged from 0.851 to 0.912. The results attained from the analysis produced a new theory towards U-tech usage. The significant paths found were TC influences U-Tech usage (β=0.35, p=0.000), PE influences u-tech usage (β=0.41, p=0.000) and FC influences U-tech usage (β=0.23, p=0.000). Meanwhile, the structural paths for EE (β=0.26, p=0.000) and SS (β=0.52, p=0.000) towards u-tech usage were mediated by BI. Thus, it can be concluded that, 63% of the variance in u-tech usage described by the five factors. This study suggested that to increase the use of U-tech, the students need to be given more training and more workshops. The university administration should play an active role in disseminating any news that is related to the usefulness of U-Tech

The efficacy of the period of saccharification on oil palm (Elaeis guineensis) Trunk sap hydrolysis

© IJTech 2018. This study investigates the enzymatic hydrolysis rate of Oil Palm (Elaeis guineensis) Trunk (OPT) sap in terms of the length of saccharification process with the aim to elevate sugar production. Emphasis was placed on the reaction time and addition of supplements such epsom salt (MgSO4) and alanine amino acid (C3H7NO2) to accelerate the efficiency of Saccharomyces cerevisiae containing the enzyme invertase. A whole oil palm trunk was divided into four different sections, upper, middle-1, middle-2 and bottom with separate experiments over 10 days enzymatic reaction period. The highest saccharification rate was shown as 13.47% on the tenth day. This result indicates that the increase in the saccharification rate was positively correlated with the length of hydrolysis. Moreover, the sample with nutrients achieved the highest sugar output, 17.91% on the fourth day of hydrolysis which was 4.44% higher than the hydrolysis rate of the sample without nutrients. In the presence of complex OPT sugars, together with other essential elements, epsom salt and alanine amino acid, S.cerevisiae achieved a higher hydrolysis metabolism to simple sugars as the cells strived to produce energy and regenerated the invertase. Moreover, the upper part of the OPT rendered the highest potential for sugar production with levels of 21.2% with supplements and 15.6% without. From this experimental analysis, a conventional saccharification method was optimized through the addition of nutrients and a prolonged (10 days) hydrolysis process which yielded an increase in sugar production