Asian Transactions on Engineering

Volume: 05, Issue: 05, October 2015
ISSN 2221-4267

Title: Effectiveness of Waste Vegetable Oil Biodiesel and Soybean Oil Biodiesel as Additive in Water Based Mud System
Author(s): A. P. Tchameni, Lin Zhao
Paper ID: ATE-15050547
Pages: 1 - 7
Abstract: Selection of drilling mud mainly depends on the dual-factors cost and performance. This paper compared the effectiveness of biodiesel produced from waste vegetable oil (cheap) and soybean oil (expensive) as additive in water based mud system at the temperature of 28oC and 180oC in free-salt bentonite mud and calcium contaminated mud. The results showed that soybean oil biodiesel emulsion mud (SBEM) density was higher (8.762 1b/gal) compared to waste vegetable oil biodiesel emulsion mud (WBEM) (8.679 1b/gal) in salt-free bentonite muds at 28oC. Comparatively, WBEM density was higher 8.887 1b/gal whilst SBEM was 8.846 1b/gal when the muds were exposed to calcium contaminant. Additionally, after aging at 180oC, WBEMs demonstrated better retained of their plastic viscosities than that of SBEMs at different conditions studied. Furthermore, API filtration loss test results in free-salt bentonite mud indicated that SBEM and WBEN fluid loss volume were (1.6 cm3- 10.3 cm3)/7.5 min and (1.5 cm3-1.9 cm3)/ 7.5 min respectively at the temperature of 28oC and 180oC. However, SBEM fluid loss volume was (2.6 cm3-17.3 cm3)/ 7.5 min compared to WBEM (1.85 cm3-2.25 cm3)/7.5 min in calcium contaminated mud. Through out these results, the formulated WBEM demonstrated superior performance than that of SBEM in geothermal and saline condition.

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Title: The Influence of CO2 in CNG-Diesel as Pilot Fuel in Compression Ignition Engine
Author(s): Farah Idayu Z., A.Rashid A.Aziz, Morgan R.H, Firmansyah and Ezrann Z. Zainal A.
Paper ID: ATE-15010563
Pages: 8 - 10
Abstract: In this study, towards the effort to decrease the emissions of compression ignition engine, lot of researchers come out with many solution to improve the compress ignition engine emissions. In this paper, a brief review how the influence of CO2 inside the compression ignition engine or diesel engine with compress natural gas (CNG) with diesel as pilot fuel. In other hand, the example of exhaust gas recirculation (EGR) as the influence of high CO2 into the engine will be explain in this paper.

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Title: A Review of Utilization of Oxygen Enrichment with High CO2-CNG Content for a Spark Ignition Engine
Author(s): Farahida Y., A. Rashid A. Aziz, M. R. Heikal, Firmansyah and Ezrann Z. Zainal A.
Paper ID: ATE-15020537
Pages: 11 - 14
Abstract: These paper represents the potential of the utilization of an enriched oxygen content on the performance and emission with CO2- CNG content. With higher CO2 content in an engine leads to lowers in the burning velocity and give the effect of engine performance. Enriched oxygen is one of the useful energy saving technologies for combustion systems. Usually, the presence of higher oxygen content in the intake air of an engine yield the higher power output compare with others conventional petrol and diesel. An addition, by increase the oxygen content in air intake can contribute to decrease the ignition delay and the same time can reduce the emission of carbon monoxide and hydrocarbon.

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Title: Leaching of Cementitious Materials: A Review
Author(s): Jhutan Chandra Kuri
Paper ID: ATE-15040519
Pages: 15 - 18
Abstract: Abstract-Concrete is one of the widely used construction materials in the world. Performance of concrete depends on its mechanical and durability properties. Properties of concrete can be deteriorated for various reasons. Water can be considered as one of the main deterioration factors of concrete. Dissolution and alteration of cementitious materials occur due to long term contact with water. Many concrete structures such as hydraulic structures, water purification plants, radioactive waste containers, underground structures, tunnels etc. are contacted with water. When these structures in contact with water for a long time, there will be a chance of leaching which degrades the performance of structures. The composition and structure of the materials must be known for safety prediction of these structures. A state-of-the-art review of the leaching of cementitious materials is presented in this paper. The review includes the basic concept of leaching, evaluation methods of leaching, improvement of methodology, leaching effects on structures, etc. Based on the scope, the future work on the topic is outlined.

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