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Abdul Hadi Abdullah,Ramli Mat,Sathoshini Somderam,Azharin Shah Abd Aziz,Amri Mohamed 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.65 No.-
The adsorption of hydrogen sulfide (H2S) from the gas stream in a fixed-bed reactor has been investigated using zinc oxide (10–30 wt% loading) impregnated on Na-A zeolite prepared from local kaolin. The adsorbents obtained were characterized by XRF, XRD, FTIR, nitrogen adsorption and SEM. Reductions of micropore surface area and micropore volume of Na-A zeolite were observed after modification with zinc oxide. H2S adsorption capacity was the highest, 15.75 mg S/g sorbent, when 20 wt% ZnO was loaded on Na-A zeolite. Reduction in adsorption capacity was observed when wt% ZnO increased above 20 wt%.
The needs of power spectral density in fatigue life prediction of heavy vehicle leaf spring
Lennie Abdullah,Salvinder Singh Karam Singh,Shahrum Abdullah,Abdul Hadi Azman,Ahmad Kamal Ariffin,Yat Sheng Kong 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.6
This study characterized the properties of random strain loading data for using power spectral density (PSD) in frequency domain of a heavy vehicle leaf spring. This is due to missing data caused by the sensitivity of the strain gauges in capturing strain signal. Strain signal was captured from a leaf spring component for 100 s at a sampling rate of 200 Hz using strain gauge. Fatigue life prediction was computed using strain-life models: Coffin-Manson, Morrow and Smith-Watson-Topper (SWT). The fatigue strain data showed that downhill data produces the lowest fatigue life prediction at 3.42 × 10 2 cycles/block with high energy of 3.6 × 10 4 µɛ 2 .Hz -1 ; then it was followed by curve and highway data. This was supported by the rootmean-square (RMS) value at 324.24 µɛ as it is directly related towards the PSD based on the energy contained for each captured signal. The correlation of fatigue life and strain amplitude was calculated to identify the distribution of fatigue strain data of leaf spring. Thus, the fatigue strain loading data can be characterized properly based on the energy content in PSD, the statistical parameter in the form of RMS value and the correlation with strain amplitude for random strain loading of leaf spring.
Mohammed M. Rahman,Sher Bahadar Khan,Hadi M. Marwani,Abdullah M. Asiri,Khalid A. Alamry,Malik Abdul Rub,Anish Khan,Aftab Aslam Parwaz Khan,Naved Azum 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
In this report, the doped ZnO-CdO nanoblocks (NBs) have been synthesized by facile wet-chemical technique at low-temperature and characterized by UV–vis, FT-IR, XRD, FESEM, XPS, XEDS, etc. The NBs were applied for the selective detection of Fe(III) ions and photo-catalytic degradation using Brilliant cresol blue (BCB). The analytical efficiency of NBs phase was also investigated for a selective detection of Fe(III) by ICP-OES. NBs were found to be the most selective toward Fe(III), where adsorption process was mainly monolayer on a homogeneous adsorbent surface. In photo-catalysis, almost 52.3% degradation with BCB dye was observed under solar sources with NBs.
Low dimensional Ni-ZnO nanoparticles as marker of toxic lead ions for environmental remediation
Mohammed M. Rahman,Sher Bahadar Khan,Hadi M. Marwani,Abdullah M. Asiri,Khalid A. Alamry,Malik Abdul Rub,Anish Khan,Aftab Aslam Parwaz Khan,Abdullah H. Qusti 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3
We have synthesized Ni-ZnO nanoparticles (NPs) by a wet-chemical route using reducing agents. Thestructural and optical properties of Ni-ZnO NPs were investigated by various conventional methods. Theanalytical potential of the Ni-ZnO NPs was studied for a selective detection of toxic Pb(II) ion usingrecognized ICP-OES method for environmental remediation. Data obtained from the selectivity studyindicated that the selectivity of Ni-ZnO NPs phase was the most toward Pb(II) ion. However, theadsorption isotherm data of Pb(II) on Ni-ZnO NPs phase was good-match with the Langmuir-Adsorption-Isotherm, strongly supporting that the adsorption process was mainly monolayer on homogeneousadsorbent surfaces.
Anish Khan,Aftab Aslam Parwaz Khan,Abdullah M. Asiri,Malik Abdul Rub,Naved Azum,Sher Bahadar Khan,Hadi M. Marwani 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
A new class hybrid poly(2-methoxy aniline) Sn(II)silicate carbon nanotubes composite was synthesized by sol–gel method. The physico-chemical characterization was carried out by Scanning Electron micrograph, X-ray Diffraction, Fourier Transform Infrared, Ultraviolet–Visible Spectroscopy and simultaneous Thermo Gravimetric Analysis. The ion-exchange studies were also carried out to understand the ion-exchange capabilities. The dc electrical conductivity studies reviles its highly conducting nature in the range of 2–3-2 S cm-1. On the basis of distribution studies it was found highly selective for Hg2+. Due to selectivity of the composite, ion selective membrane was prepared and employed it as an indicator electrode in potentiometric titrations.
Faten Ermala Che Othman,Norhaniza Yusof,Hasrinah Hasbullah,Juhana Jaafar,Ahmad Fauzi Ismail,Norfadhilatuladha Abdullah,Nik Abdul Hadi Md Nordin,Farhana Aziz,Wan Norharyati Wan Salleh 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.51 No.-
PAN-based ACNFs incorporated with MgO was prepared by electrospinning process followed byappropriate activation process. The addition of MgO caused physicochemical changes in term of smallerfiber diameter with an average diameter of 520 nm and higher surface area which is up to four times(1893 m2 g 1) as compared to pristine ACNFs (478 m2 g 1). Moreover, the modified ACNFs possessed abetter adsorption capacity with higher CH4 adsorption of 2.37 mmol g 1. From the experimental data, theadsorption of CH4 by composite ACNFs obeyed the pseudo-second order kinetic model with R2 value up to0.9996 and bestfitted by Freundlich isotherm model.