Farizul Hafiz Kasim, Assoc. Prof. Dr.http://dspace.unimap.edu.my:80/xmlui/handle/123456789/399942024-03-29T10:46:42Z2024-03-29T10:46:42ZOil blends as biolubricant: Screening of effect factors influence to basestockRozaini, AbdullahFarizul Hafiz, KasimSiti Nur Amalieya Syaza, Mohd ZukiNoor Hajarul Ashikin, Shamsuddinhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/339552014-04-23T06:47:38Z2013-12-01T00:00:00ZOil blends as biolubricant: Screening of effect factors influence to basestock
Rozaini, Abdullah; Farizul Hafiz, Kasim; Siti Nur Amalieya Syaza, Mohd Zuki; Noor Hajarul Ashikin, Shamsuddin
The price fluctuation and negative environmental effect of mineral oil-based lubricant are the main factors which instigate the research on high-oleic vegetable oil as its possible replacement. In this study, the factors involved in blending process of waste cooking oil (WCO) and Jatropha curcas oil (JCO) as biolubricant basestock were investigated using 2-level factorial design. The molar ratio of WCO to the JCO (WCO:JCO), stirring speed and blending times were the three factors studied. The WCO:JCO, stirring speed and the blending time were found to be significant to the increased of oleic acid content in the basestock. The highest percentage of oleic acid achieved was 53.31 % at molar ratio of WCO:JCO at 20:80, 350 rpm and time at 30 minutes. Thus this study exposed the potential of new blending oil which are comparable with other vegetable and mineral oils as base stock for bio-lubricant in term of fatty acid compositions.
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2013-12-01T00:00:00ZThermogravimetric analysis and the optimisation of bio-oil yield from fixed-bed pyrolysis of rice husk using response surface methodology (RSM)Khairuddin, Md IsaSuhardy, DaudNasrul, HamidinKhudzir, IsmailSaiful Azhar, SaadFarizul Hafiz, Kasimhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/113052011-03-16T02:24:25Z2011-03-01T00:00:00ZThermogravimetric analysis and the optimisation of bio-oil yield from fixed-bed pyrolysis of rice husk using response surface methodology (RSM)
Khairuddin, Md Isa; Suhardy, Daud; Nasrul, Hamidin; Khudzir, Ismail; Saiful Azhar, Saad; Farizul Hafiz, Kasim
The effects of pyrolysis temperature, heating rate, particle size, holding time, and gas flow rate were investigated to optimize bio-oil yield from rice husk pyrolysis. Thermogravimetric analysis showed thermal degradation of hemicellulose, cellulose and lignin, indicating faster decomposition of cellulose compared to lignin. The optimisation process was analysed by employing central composite design (CCD) in response surface methodology (RSM) using Design Expert Version 7.5.1 (StatEase, USA). A two-level fractional factorial was initially carried out and followed by RSM. The statistical analysis showed that pyrolysis temperature, heating rate, particle size and holding time significantly affected the bio-oil yield. By utilising response surface method, these four factors were investigated, analysed and optimal conditions were obtained at pyrolysis temperature of 473.37 °C, heating rate of 100 °C/min, particle size of 0.6 mm and holding time of 1 min. Confirmation runs gave 48.30% and 47.80% of bio-oil yield compared to 48.10% of predicted value. Furthermore, the pyrolytic bio-oils obtained from fixed-bed pyrolysis were examined using gas chromatographic/mass spectroscopy (GC/MS), Fourier transform infrared (FTIR) methods, elemental analyzer, pH probe and bomb calorimeter.
Link to publisher’s homepage at http://www.elsevier.com/
2011-03-01T00:00:00ZConsequences analysis for storage explosiveSaiful Azhar, SaadAbdul Rahman, M.Saari, MustaphaFarizul Hafiz, KasimSuhardy, Daudhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/74582010-01-03T01:14:35Z2006-05-16T00:00:00ZConsequences analysis for storage explosive
Saiful Azhar, Saad; Abdul Rahman, M.; Saari, Mustapha; Farizul Hafiz, Kasim; Suhardy, Daud
The fire and explosion incident at the Bright Sparklers Sdn. Bhd. Factory at Kg. Baru Sungai Buloh on 7 May 1991 had revealed many shortcoming and the lack of understanding in handling the explosives materials.
Risk assessment study has been conducted in Kimanis Quarry Sdn. Bhd, located in Papar, Sabah. Risk assessment had been carried out with the identification of hazards and failure scenarios and estimation of the failure frequency of occurrence. Analysis of possible consequences of failure and the effects of blast waves due to the explosion was evaluated. The risk had been estimated in term of eardrum rupture to the workers and public. The average individual voluntary risk for eardrum rupture to the workers at the quarry was found to be 3.15 x 10-6 per person per year and for involuntary risk, it is calculated to be 6.98 x 10-8 per person per year
Organized by Universiti Malaya, 16th - 17th May 2006 at Crystal Crown Petaling Jaya, Malaysia.
2006-05-16T00:00:00ZCharacterization of cellulose and pulp obtained from rice straw plants of diferent pulping process using scanning eletron microscpy (SEM)Suhardy, DaudMustaffa, NawawiWan Su, HaronFarizul Hafiz, KasimSaiful Azhar, Saadhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/64152009-07-10T02:08:17Z2005-09-12T00:00:00ZCharacterization of cellulose and pulp obtained from rice straw plants of diferent pulping process using scanning eletron microscpy (SEM)
Suhardy, Daud; Mustaffa, Nawawi; Wan Su, Haron; Farizul Hafiz, Kasim; Saiful Azhar, Saad
Non-wood raw materials account for 5-7 % of the lotal pulp and paper production worldwide Production of pulp from non-wood resources has many advantages such as easy pulping capability. In this study, the formic acid and NaOH pulping procedures for isolation of cellulose and pulp from rice straw were studied. The pulping processes arc aim to remove as much hgnin and penlosanes as possible and avoid the decomposition of cellulose during the process. The most common pulping in industries is NaOH pulping Chemically, cellulose is a linear natural polymer anhydroglucose units and paper is composed of cellulose fibers. Ligmn, which arc the combined glues that hold plant cells together, are undesirable in a finished paper product Results showed that formic acid pulping yielded 22.38 % w/w cellulose and 4 06 % w/w ligmn Besides that, with using NaOH pulping, the cellulose and ligmn contents arc 30 26 % w/w and 4.72 % w/w. The isolated cellulose and pulp samples were further characterized by scanning electron microscope (SEM) to investigate their fiber dimensions. For formic acid pulping, the fibrous structures of isolated pulp samples display stronger binding fibres compared (o the NaOH pulping.
Organized by Jabatan Kimia , Falkulti Sains, Universiti Teknologi Malaysia (UTM), 12th - 14th September 2005, Hotel Hilton, Kuala Lumpur.
2005-09-12T00:00:00Z