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- 저자 : Mohd Lokman Ibrahim (검색결과 2 건)
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Mohd S. Md Sarip,Nik M.A. Nik Daud,Mohd A. Mohd Zainudin,Lokman H. Ibrahim,Syahrul A. Saidi,Zuhaili Idham,Adilah Anuar Techno-Press 2024 Advances in materials research Vol.13 No.3
Quantitative analysis of the Zingiber Officinale sample using subcritical water extraction (SWE) was developed employing High-Performance Liquid Chromatography (HPLC) to bolster the advancement of this innovative green extraction process. This research focuses on three principal ginger bioactive compounds: 6-gingerol, 6-shagoal, and 10-gingerol. Various stages were undertaken to establish the quantitative analysis method, encompassing the optimisation of HPLC operating conditions and the formulation of standard calibration curves, yielding individual compound equations. A robust correlation within the calibration curve was achieved, exhibiting an r<sup>2</sup> value of 0.9814 and an RSD of 5.00%. A simultaneous, swift, and dependable method was established with an injection time of 20 minutes and an 8-minute delay between injections, in contrast to the previous HPLC analysis requiring a 45-minute injection time for detecting and quantifying all components. Notably, no post-treatment was applied after the SWE process. This advancement allows for potential future online measurement of Zingiber Officinale bioactive compounds extracted using subcritical water extraction through this technology.
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A review on influence of reactor technologies and kinetic studies for biodiesel application
Ijlal Raheem,Mohd Nurfirdaus Bin Mohiddin,Yie Hua Tan,Jibrail Kansedo,N.M. Mubarak,Mohammad Omar Abdullah,Mohd Lokman Ibrahim 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.91 No.-
The increase in demand for energy has caused a clear contradiction between the supply and consumptionof these resources, which has triggered countries to divert their attention towards biodiesel. Biodieselyield and sustainability of the biodiesel production process are highly influenced by the catalyst. Homogeneous catalyst is the conventional method to produce biodiesel, but it requires larger waterconsumption to purify thefinal product while on the contrary heterogeneous catalyst does not requireexpensive utility separation cost and it can be separated from simplefiltration method. Thus, this papercomprehensively reviews the conventional and advanced biodiesel reactor technologies, particularly linkto the kinetic studies of different types of catalysts. The effects of the operating conditions on the reactortechnology with different catalysts are discussed to observe a better oil conversion. Merits andlimitations of different catalysts for biodiesel production are then compared. The kinetic studies arereviewed to compare the rate of reaction and activation energy between various types of catalysts. As thecatalyst and reactor type selection affect the transesterification reaction, it is necessary to search for thecorrect combination of catalyst and reactor to increase the efficiency of biodiesel production at a lowercost.
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