Browsing by Author "Abdulrahim A. T"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    BIODIESEL YIELD FROM DIFFERENT VARIETIES OF CASTOR SEEDS OIL
    (INTERNATIONAL JOURNAL OF PHYTOFUELS AND ALLIED SCIENCES, 2014-09) Oluwole F. A; Abdulrahim A. T; Aviara N. A; Umar B.
    Mechanically expressed oil from four varieties of castor seeds namely: white big size (WBS), black big size (BBS, grey medium size (GMS) and grey small size (GSS) were converted to biodiesel by reacting the oil with methanol in the presence of potassium hydroxide in a transesterification process. Comparative evaluation was carried out to determine biodiesel yield from the varieties. Results show that the GMS variety gave the highest biodiesel yield followed by the GSS and the BBS with the WBS giving the least yield. The GMS variety, which gave the highest biodiesel yield is recommended for the production of biodiesel. Keywords: Castor oil, catalyst, methanol, transesterification, biodiesel yield.
  • Thumbnail Image
    Item
    DEVELOPMENT OF A WATER AIR-CONDITIONER FOR THE SEMIARID REGION OF NIGERIA
    (2007-10) Aji I; ; Balami A.A.; Abdulrahim A. T
    The harsh weather condition experienced in Maiduguri between the months of February and June of most years has been a problem to the populace. Buying conventional air-conditioners to ameliorate this problem is difficult for the ordinary people in Maiduguri. In an attempt to lower the temperature of an average 16m2 room, an electrically operated water supply cooling system was designed, constructed and tested and was found to make the room conducive for human comfort. Guard sponge was selected and used out of the existing sponges because it has been found to reduce the ambient temperature better than others. Weather conditions of Maiduguri for the past fifteen years and the unreliability of electricity supply were put into consideration in the design of the water air conditioner. The machine was able to reduce the temperature of an average room (16 m 2 ) by 28% over a period of 42 minutes. The efficiency of the water air-conditioner with respect to the conventional unit is 60%. Seventy five per cent the machine parts were sourced locally, this is to make its production cheap and more affordable to low income earners.