Hairul Nazirah Abdul Halim
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Preferred name
Hairul Nazirah Abdul Halim
Official Name
Hairul Nazirah, Abdul Halim
Alternative Name
Abdul Halim, Hairul Nazirah
Abdul Halim, H. N.
Hairul, N. A.H.
Abdul Halim, Hairul N.
Halim, H. N.A.
Halim, Hairul N.Abdul
Main Affiliation
Scopus Author ID
23388800300
Researcher ID
FYZ-8202-2022

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  • Publication
    Effect of CO₂ concentration and liquid to gas ratio on CO₂ absorption from simulated biogas using Monoethanolamine solution
    (IOP Publishing Ltd, 2020)
    V Rajiman
    ;
    Hairul Nazirah Abdul Halim
    ;
    A M Shariff
    In industrial scale, removal of CO₂ by chemical absorption from raw biogas represents an imperative treatment and the cutting-edge technology towards improvement of its quality and heat value. In this work, CO₂ absorption studies were conducted in an absorption column packed with Sulzer metal gauze packing with simulated biogas absorbed using 30 wt. % of monoethanolamine (MEA) solution. Experimental works were conducted to determine the influence of different CO₂ concentrations in feed gas (30 % and 40 %) and L/G ratio (0.6 and 0.7) and subsequently assessed in terms of CO₂ absorption efficiency along the column. The results showed that 30 % CO₂ in feed gas has higher removal efficiency as compared to 40 % CO₂ with the ability to remove 94 % CO₂ during the process. In addition, the CO₂ absorption studied on the L/G ratio proved that CO₂ removal was improved at higher L/G ratio of 0.7.
  • Publication
    Impact of N-Methyl-2-Pyrrolidone in Monoethanolamine solution to the CO₂ absorption in packed column: analysis via mathematical modeling
    (Penerbit UKM, 2020)
    L.S. Tan
    ;
    A.M. Shariff
    ;
    W.H. Tay
    ;
    K.K. Lau
    ;
    T. Tsuji
    ;
    Hairul Nazirah Abdul Halim
    This work investigates the reason behind the change of CO₂ absorption behaviour exhibited by monoethanolamine (MEA) solution via mathematical modeling analysis when physical absorbent, i.e. n-methyl-2-pyrrolidone (NMP), was added into the solution. The mathematical modeling included the heat model using time resolved numerical method. Based on the results, it was found that lower CO₂ removal performance with the addition of NMP into MEA solution at pressure of 0.1 MPa was mainly due to the lower temperature rise along the column, which resulted in lower reaction rate. However, at 3 and 5 MPa pressure conditions, the high physical absorption capability contributed by the presence of NMP in MEA hybrid solution enhanced the CO₂ absorption performance of MEA hybrid solution significantly. As such, temperature rise of solution was identified as the dominating factor affecting the performance of the hybrid solvent. The reaction rate of MEA was not affected by the addition of physical solvent. This finding shed crucial insight on the behaviour MEA-NMP hybrid solution which can be applied during scale-up of the process.