DR. REX B. DEMAFELIS
UPLB OVCRE Vice Chancellor/Professor 12
CONTACT INFORMATION:
Department of Chemical Engineering, College of Engineering and Agro-Industrial Technology, University of the Philippines Los Baños, College, Laguna (Tel # +63 (049) 536-2315)
Email Address: [email protected]
EDUCATION:
| Year | Degree | University |
| 2016 | PhD Environmental Science | University of the Philippines Los Baños |
| 1990 | MS Chemical Engineering | University of the Philippines Diliman |
| 1984 | BS Chemical Engineering (Cum Laude) | University of San Agustin, Iloilo City |
RESEARCH INTERESTS:
Biofuels Production and Policy Development; Life Cycle Assessment; Water Footprint; Carbon Footprint; Energetics
PUBLICATIONS: (Google Scholar Page)
Demafelis, R.B., Movillion, J.L., Predo, C.D., Maligalig, D.S., Eleazar, P.J.M., and Magadia B.T., (2020). Socio-economic and Environmental Impacts of Bioethanol Production from Sugarcane and Molasses in the Philippines: Journal of Environmental Science and Management 23-1:96-110. ISSN 0119-1144. June 2020.
Gatdula, K.M., Demafelis, R.B., Judda, N.R., Dizon, L.S.H., Movillion, J.L., Bambase, M.E., and Guerrero, G.A.M. (2020). Optimizing Clarification of Sweet Sorghum Substrate for Production Of Bioethnaol. PIChE Journal Volume 19, No. 1 February 2020
Asuncion, Jr., R.V., Demafelis, R.B., Gatdula, K.M., Dizon, L.S.H., Pector, A.A., Movillion, J.L., Bambase, M.E. (2020). Parametric Study on Simultaneous Acetone-Butanol-Ethanol Production from Saccharine Feedstocks. PIChE Journal Volume 19, No. 1 February 2020
Dizon, L.S.H., Pector, A.A., Demafelis, R.B., Bataller, B.G., Badayos, R.B. Elepano, A.R., Dorado, M.A., Baticados, E.J.N., Obligado, F.B., and Gatdula, K.M. (2020). Environmental and Economic Viablity of Biodiesel Production from Palm Oil in the Philippines. PIChE Journal Volume 19, No. 1 February 2020
Beltran, A.K.M, Samson, E.G., Angeles, D.E., Demafelis, R.B., and Rivera, H.F. (2020). Agronomic and Yield Performance of Sweet Sorghum under Different Fertilizer Schemes. Philipp J Crop. Sci. Special issue April 2020(1)
Camus, D.R.C., Sanchez, P.A.J, Eslava, D.F. and Demafelis, R.B. (2020). Perception-based Social Acceptability of Subsurface Flow Constructed Wetland Treated Dairy Farm Wastewater Reuse for Irrigation: Internet Journal of Society for Social Management Systems Volume 12 Issues 1 sms 19-6160 ISSN 2432-552X
Matanguihan, A.E.D., Demafelis, R.B., Milagroz, G.M., Nacorda, J.O.O., Torreta, N.K., Sanchez, D.E.S, Sanchez, L.F.C, Eleazar, E.M.P. and Dizon, L.S.H. (2018). Philipp J Crop Sci. Special issue December 2018:10-20
Dizon, L.S.H., Demafelis, R.B., Bambase Jr., M, Sanchez, D.E.S. Hourani, K.A., and Magadia Jr., R.V. (2018). Multistage Base-Catalyzed Transesterification of Soybean Oil for Biodiesel Production. Philipp J Crop Sci. 149: 383-392. ISSN 0031-7683
Gatdula, K.M., Demafelis, R.B., Movillon, J.L., Sanchez, D.E.S., Hourani, K.A., Maagadia Jr., R.V. (2018). Energetics and Environmental Assessment of a Commercial Scale Bioethanol Processing Plant using Sargassum spp. Philipp J Crop Sci. Special issue December 2018:10-20
Demafelis, R.B., Alcantara, A.J., Movillon, Pacardo, E.P., Espaldon, M.V.O, Flavier, M.E., and Magadia-Tongko, B.D. (2018). Carbon Emission Reduction and Payback Analyses of a Commercial Scale Molasses-based Bioethanol Production. Philipp J Crop Sci. Special issue December 2018:21-28
Magadia-Tongko, B.D., Demafelis, R.B., Mendoza, T.C. (2018). Greenhouse Gas Emission Reduction Potentials of Bioethanol Production and End-Use in the Philippines at Varyig Sugarcane Yields: An Ex-Ante Analysis. Philipp J Crop Sci. Special issue December 2018:29-34
Capunitan, J.A. Bambase J.R., Borines, M.G., Demafelis, R.B., Movillon, Abarquez, N.C.R., Condecion, G.L. Garcia, A.A. and Paz, G.A.O. (2018). Thermal Decarboxylation of Coconut Oil using Different Catalysts. Philipp J Crop Sci. Special issue December 2018:77-86
Demafelis, R.B., Mendoza, T.C., Matanguihan, A.E.D., Malabuyoc, J.A.S., Magadia Jr., R.V., Pector, A.A., Hourani, K.A., Manaig, L.M.A., and Movillon, J.L. 2017. “Is Raw Sugar Produced from Sugarcane (Saccharum officinarum L.) Carbon Positive or Negative?” International Journal of Agricultural Technology 13(4): 565-581.
Eleazar PJM, Demafelis R.B., Matanguihan AED, Tongko-Magadia BD, Gatdula KM, Predo CD.2017. Knowledge, Attitude, and Perception and Willingness-to- Pay Survey for the Drafting of Carbon Tax Policy in the Philippines. Philipp J Crop Sci. ISSN 0115-463x
Demafelis R.B., Alcantara AJA, Pacardo EP, Flavier ME, Matanguihan AED. 2017. Energetics and water requirement of a commercial scale sweet sorghum ethanol production. Journal of Environmental Science and Management. Special Issue: 1-11. ISSN 0119-1144
Obligado AB, Demafelis R.B., Matanguihan AED, Villancio VT, Magadia RV Jr, Manaig LMA. 2017. Carbon emission inventory of a commercial scale Jatropha (Jatropha curcas L.) biodiesel processing plant. Journal of Environmental Science and Management. Special Issue: 20-32. ISSN 0119-1144
Demafelis R.B., Gatdula KM, Malabuyoc JAS, Baticados EJN. (2017). Sweet sorghum juice and syrup production using conventional sugarcane mill and evaporator. Journal of Environmental Science and Management. Special Issue: 40-47. ISSN 0119-1144
COURSES TAUGHT:
| Course Code | Course Title |
| ChE 192 | Chemical Engineering Equipment Design |
| ChE 193 | Chemical Engineering Plant Design |
| PPT 193 | Pulp ad Paper Plant Design |
| ChE 200 | Chemical Engineering Undergraduate Thesis |
| ChE 300 | Chemical Engineering Master’s Thesis |
| ENS 300 | Environmental Science Master’s Thesis |
| ENS 400 | Environmental Science Dissertation |
ORGANIZATION/AFFILIATION:
National President, Philippine Institute of Chemical Engineers