vol. 4 no. 2 (2004)

EDITOR'S NOTES

FOR THE FIRST time in its four year history,the ASEAN Journal of Chemical Engineering comes out with two issues for volume 4 in 2004. Thus, we continue to prove with this abundant harvest the dynamic state of research in Chemical Engineering as well as the tireless dedication of our ASEAN research partners and colleagues in service not only of the Region's various technological and research institutes but of their respective nations as well.

Thus, for this issue, we continue the trend towards theoretical-level solutions, practical-level innovations,and process-levelimprovementswith 10 engagingpapers that are both enjoyableto read and would make for interestingapplicationsfor their respective industriesand for the concerns they address.

Taslim and Takriff present an investigation of gas-liquid mass transfer in oscillatory flow in a vertical baffled column under continuous operation condition and come up with a mass transfer coefficient to power density and superficial gas velocity.

Brondial explores using the buffering potential of BCPH-NaBCP to make geofluids in local

geothermal wells less acidic and noncorrosive and, therefore, safer for plant conduits and more cost-efficient for companies that have lost millions in digging and then plugging up well sites. Kamarudin, Daud, Som, Mohammad, and Takriff show how the overall heat exchanger network design result in 92-95% energy recovery after heat integration and can, consequently, (a) reduce capital costs and utilities, (b) maintain operating costs for the fuel cell system, and (c) minimize both the system's size and weight for industries.

Fukuta, Ito, Sawada, Kojima, Bernardo, Matsuda, and Yagishita describe how the sulfurating agents NazS, NazSz, and NaZS4 effectively reduce nickel concentration in simulated wastewater from 100 mg.N/Lto about 0.594-3.37 mg.N/L;and, therefore, potentially helpful in treating plate metal solution of its metal content.

Manan convincesus on the usefulnessof usingeitherthe compositecurveor the grand composite curve as tools, by which we would be able to screen projects rightbased on their utilityoptimization and institute basic process modifications to reduce further our' energy consumption as well as emissions. Thus, we are not only able being environment-friendly but also cost-efficient as we minimizeinvestment and operating costs in our treatment plants.

Susanto and Syamsuriputra prove how alkaline treatment and adsorption onto activated carbon are ineffectivein the detoxificationof hydrolysate from oil palm EFB and, contrary, how vacuum evaporation can significantly reduce the furfural content in the hydrolysate-opening possibilitiesfor furfuralrecovery-while increasingsugar concentration up to 96.6 g/L.

Carrillo and Gallardo suggestthat compostingis a better way to recyclepaper-millsludge, at least based on samples from TIPCO, whose characterizati on revealed vastly minimal heavy-metal content compared to the standards setby the U.S.Environmental ProtectionAgencyand the Philippine Department of Agriculturefor organic fertilizers. Purvis, Lirn, Races, Salazar, Tan, and Santos demonstrate the potential of modelling studies to produce useful predictions for limited conditions of solid-fuel combustion, especially for 20 and 3D lump fuel-packed beds, in the light of biomass materials whether from wastes or energy crops being an increasingly imporant source of sustainable energy worldwide.

LET US CONGRATULATE ourselves for the continuous and earnest production not only of authoritative research outputs-papers published in journals and read in conferences, experimental results that await publication and verification in our own campuses, among others-but also useful and practical knowledge that would help the region and the world at large to develop industrially and technically.

We look forward to more contributions, especially from the nations less represented during our past issues, for another fruitful and equally productive year ahead.

Let us show the world that research can be a part of our peoples daily livesand not just of the academe. More power!

Table of Contents

Articles

Gas-LiquidMassTransferin Continuous Oscillatory Flow BaaledColumnina Abstract Full Text
Taslim , Mahd. Sabri Takriff 1-6
Bunering apabiliti of B-chloropropionic Acid-Sodium B-chloropropionate Slstellin Acidic Geotherllal Brine Abstract Full Text
Yolanda P. Brondial 7-15
Optimization of 5-kW Mobile and Portable PEMFC System via Energy Integration Abstract Full Text
Siti Kartom Kamarudin, Wan Ramli Wan Daud, Ayub Md. Som, Jr. Abdul Wahab Mohammad, Mohd. Sobri Takrif 19-23
Separation of Nickellrom Plating Solution by Sulluration TreatmentT Abstract Full Text
T. Fukuta, T. Ito, K. Sawada, Yoshihiro Kojima, Eileen C. Bernardo, Hitoki Matsuda, K. Yagishita 24-31
Maximizing Energy Efficiency and Minimizing Environmental Emissions in the Process Industri Using Thermal Pinch Analysis Abstract Full Text
Zainuddin A. Manan 32-39
Utilization of Sugars in Hydrolysate from Oil Palm Empty Fruit Bunches for Ethanol Fermentation using Pichiastipitis CBS 5773 Abstract Full Text
Herri Susanto, Achmad Ali Syamsuriputra 40-47
Coagulation-Adsorption of Suspended Solids and Residual Oil from Palm Oil Mill Effluent using Chitosan Abstract Full Text
Abdul Latif bin Ahmad, S. Sumathi, Bassim H. Hameed 48-57
Heavy Metals Characterization of Sludge from a Philippine Recycling Paper Mill Abstract Full Text
Lorraine A. Carrillo, Susan M. Gallardo 58-65
Perfomance of Chromium-Exchanged Zeolite Catalysts in the Combustion of Volatile Organic Compound Pollutants Abstract Full Text
Ahmad Zuhairi Abdullah, Mohamad Zallani Abu Bakar, Subhash Bhatia 66-74
Modelling as an Aid to Biomass Combustion in Plant Design Abstract Full Text
Michael R.I Purvis, Gilbert Lim, Susan A. Races, Carlita M. Salazar, Raymond Girard R. Tan, Stanley Santos 75-83