KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Na-Ranong, DuangkamolSubject: search.filters.subject.Adsorption

Search Results

Now showing 1 - 3 of 3
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    PREPARATION OF ACTIVATED CARBON FROM TIRE DERIVED PYROLYTIC CHAR FOR ADSORPTION OF TETRACYCLINE HYDROCHLORIDE
    (2022-12-01)
    Chana, Khulanuttha
    ;
    Soisuwan, Sasit
    ;
    Sinpichai, Sarawut
    ;
    Chen, Bing Hung
    ;
    Na-Ranong, Duangkamol
    Effects of activation variables on performance of the obtained activated carbon (AC) were investigated for removal of tetracycline hydrochloride (TCH). Pyrolytic char derived from waste tire was chemically activated via two-step of KOH impregnation following by thermal treatment. According to regression analysis and fitting with second-degree polynomial equation, empirical models were developed to correlate performance of AC in TCH adsorption (percentage removal and adsorption capacity at equilibrium) with three activation variables: impregnation ratio (IR), activation temperature (T) and holding time of thermal treatment (t). The analysis of variance indicated that only T, T<sup>2</sup> and IR<sup>2</sup> were significant to the prediction of both percentage removal and adsorption capacity. According to the developed models, it is suggested that the pyrolytic char should be activated at IR = 6, T = 750 °C and t = 2 h to obtain the highest efficiency of TCH removal in the tested range of activation condition.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Kinetics and Equilibrium Modeling of Sterol Adsorption on Styrene-Divinylbenzene Cation-Exchange Resins
    (2019-04-01)
    Yuangsawad, Ratanaporn
    ;
    Sinpichai, Sarawut
    ;
    Bhamarasuta, Thanutchaporn
    ;
    Ladadok, Chinakrit
    ;
    Panchanon, Surakan
    The potential of recovering phytosterols from fatty acid methyl esters by an adsorption-desorption process is demonstrated using a strong-acid ion-exchange styrene-divinylbenzene resin (SA-R) as an adsorbent and ethanol as a desorbent. Since the operating cost of the overall process significantly depends on the efficiency of SA-R in the adsorption step, the behavior of SA-R in sterol adsorption is investigated in detail using a model solution of stigmasterol in n-heptane. The results indicate that stigmasterol was associatively and exothermically adsorbed on SA-R. Based on the experimental results, a simple pseudo-second-order model and a modified Langmuir isotherm with their parameters, which well predicted kinetics and adsorption capacity of SA-R, are proposed.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Removal of steryl glucosides in palm oil based biodiesel using magnesium silicate and bleaching earth
    (2015-03-01)
    Na-Ranong, Duangkamol
    ;
    Laungthaleongpong, Pattarin
    ;
    Khambung, Suttirat
    Steryl glucosides (SG) may cause problems including accumulation in downstream equipment in production line, storage stability of biodiesel and filter plugging in a diesel engine. In this study, adsorption was used as a post-treatment method to reduce the amount of SG in biodiesel. Commercial grade magnesium silicate (MS) and bleaching earth (BE) were selected as potential adsorbents for SG removal and their performances were evaluated comparatively. To investigate effects of important operating parameters (adsorption time, adsorbent loading and temperature), batch adsorption experiment was performed using palm oil based biodiesel containing 97.6 mg kg<sup>-1</sup> of SG as a feedstock. The results revealed that efficiency in SG removal of MS was higher than that of BE. In the tested range of 65-80 °C, by treating with 1 wt% of adsorbent, MS could reduce about 81.4-82.5% of SG, whereas BE could reduce only about 48.6-58.9% of SG. Only at low adsorbent loading, the efficiencies of both MS and BE were significantly affected by temperature and then reached the maximum values at temperatures around 70-75 °C. Due to the adsorption treatment, mono-, di- and triglycerides were simultaneously removed and the maximum selectivities towards SG adsorption of MS and BE were 11.8% and 13.5%, respectively. In addition, this adsorption treatment provides the higher efficiency in reduction of the concentration of SG (approx. 20 mg kg<sup>-1</sup> within 10 min), comparing to a conventional method.