Alina Rahayu Mohamed
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Preferred name
Alina Rahayu Mohamed
Official Name
Alina Rahayu, Mohamed
Alternative Name
Rahayu, M. Alina
Mohamed, Alina Rahayu
Rahayu Mohamed, Alina
Main Affiliation
Scopus Author ID
55349453800
Researcher ID
DHI-6721-2022

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  • Publication
    Durability properties of demineralized and torrefied Empty Fruit Bunch (EFB) pellets
    (IOP Publishing, 2020)
    Alina Rahayu Mohamed
    ;
    Ras Izzati Ismail
    ;
    Rashid, Mohammad Abdur
    ;
    Khairunissa Syairah Ahmad Sohaimi
    ;
    N N Kasim
    ;
    R Badlishah Ahmad
    The pelletization of raw and demineralized and torrefied empty fruit bunch (TDEFB) were conducted upon mixing with bio-oil that was obtained from EFB pyrolysis. The ratio of bio-oil addition to raw and TDEFB was varied from 0-20 wt%. Then it was pressed using the single pellet press machine. The effects of the ratio of bio-oil addition to raw and TDEFB and the thickness of pellets were evaluated towards its durability. It was identified that the ratio of bio-oil addition to raw and TDEFB pellet of 5 wt% had produced the optimum durability which was 69.27 and 74.46 % respectively. In terms of the thickness of the raw and torrefied pellets, it was determined that at thickness of 3 cm, the durability was the highest which were 70.12 and 71.12 % for both raw and TDEFB pellets respectively. The raw and TDEFB pellets were analysed using Fourier Transform Infra-Red (FTIR) spectroscopy in order to evaluate the presence of functional groups within the materials. The presence of O-H hydroxyl group, C=O from carbonyl or ester and C-H alkane groups are detected in both raw and torrefied pellets.
  • Publication
    Durability Studies of Solid Pellets from Torrefied Leucaena Leucocephala
    ( 2020-12-18)
    Kee Wei Chin
    ;
    Alina Rahayu Mohamed
    ;
    Zin A.M.
    ;
    Noor Hasyierah Mohd Salleh
    ;
    Aziz A.H.A.
    ;
    Mohd Qalani Che Kasim
    Torrefaction of Leucaena Leucocephala was performed in a fixed bed reactor at temperature of 300 C and 20 minutes holding time under inert environment. The torrefied Leucaena Leucocephala was pelletized with starch as the binder. Two parameters were investigated such as different ratio of starch addition to torrefied Leucaena Leucocephala pellets and the thickness of torrefied Leucaena Leucocephala pellets towards its durability. The ratios of starch addition to torrefied Leucaena Leucocephala pellets studied were 0, 5,10,15,20 and 25 wt%. Meanwhile, the studied thickness of torrefied Leucaena Leucocephala pellets were 0.3, 0.4, 0.5, 0.6 and 0.7 cm. It was observed that when the ratio of starch addition to torrefied Leucaena Leucocephala pellets was varied from 0-25 wt%, the durability increased steadily and the highest durability of 56.06% was achieved at 20 wt%. When the thickness of torrefied Leucaena Leucocephala pellets was increased from 0.3-0.7 cm, the highest durability of 93.18 % was achieved at 0.5 cm thickness. Scanning Electron Microscope (SEM) analysis was performed on the torrefied Leucaena Leucocephala pellets of 0 and 20 wt% ratio of starch addition. SEM images show the existence of some minor pores on the surface of torrefied Leucaena Leucocephala pellet at 250X and 1000X magnifications.
      6  43
  • Publication
    Kinetics Analysis on Catalytic Pyrolysis of Empty Fruit Bunch (EFB) with Copper Oxide Doped Aluminium Oxide (CuO/Al2O3) Catalyst
    ( 2020-12-18)
    Alina Rahayu Mohamed
    ;
    Zin A.M.
    ;
    Siti Nor Azreen Ahmad Termizi
    ;
    Khairunissa Syairah Ahmad Sohaimi
    ;
    Izhar N.I.I.N.
    This study focuses on dynamic non-catalytic and catalytic pyrolysis of empty fruit bunch (EFB) with copper oxide doped aluminium oxide (CuO/Al2O3) at linear ramp rates of 10, 15, 20, 25, 30 and 40 Cmin-1 at pyrolysis temperature of 28-1000 C in a thermogravimetric analyzer (TGA). The thermogravimetric profiles for the thermochemical breakdown of EFB under non-catalytic and catalytic pyrolysis with CuO/Al2O3 comprise of three different levels. The kinetics analysis for the reactions were evaluated using the Kissinger and Ozawa methods. The values of activation energy (Ea) for non-catalytic EFB pyrolysis were 167.95 and 177.68 kJmol-1 based on Kissinger and Ozawa methods respectively. For catalytic pyrolysis with approximately 9.09 wt% CuO/Al2O3 catalyst, the values of Ea reduced to 127.72 and 137.42 kJmol-1 by Kissinger and Ozawa methods respectively. These values indicate that the presence of 9.09 wt% CuO/Al2O3 catalyst has successfully reduced Ea value for the EFB pyrolysis reaction.
      33  7