Assawasaengrat, Pornsawan
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Preferred name
Assawasaengrat, Pornsawan
Alternative Name
Assawasaengrat, P.
Main Affiliation
Email
pornsawan.as@kmitl.ac.th
9 results
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Item type:Publication, Dimethyl ether synthesis from methanol over diatomite catalyst modified using nitric acid treatment(2016-08-02); Neramittagapong, ArthitDimethyl ether synthesis from methanol over diatomite catalysts modified using nitric acid was investigated. The catalytic performance of diatomite was tested in a fixed-bed reactor under atmospheric pressure and within the temperature range of 250–350°C. It was discovered that high acidity of the catalyst yielded a higher methanol conversion rate. Moreover, it was revealed that the acidity of the catalyst surface was controlled by Al<sup>(IV)</sup> ions whereas basicity of the catalyst surface was determined by Al<sup>(V)</sup> and Al<sup>(VI)</sup> ions. From this finding, the authors were able to propose the mechanism of DME synthesis from methanol over treated diatomite. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dimethyl ether synthesis via methanol dehydration over diatomite catalyst modified using hydrochloric acid(2014-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Adsorption of Ammonia Nitrogen in Aqueous Solution Using Zeolite A(2019-10-25); Rueangdechawiwat, R.The capacity of alternative adsorbents including rice straw, delignified rice straw and zeolite A for ammonia nitrogen removal from aqueous solution was investigated. The adsorption experiments were carried out in batch system with initial ammonia nitrogen concentration of 0.5 mg-N/l, 1000 ml ammonia nitrogen solution for 1 g of adsorbent. Experimental data indicated that rice straw and delignified rice straw cannot adsorb ammonia nitrogen. However, zeolite A provided rapidly adsorption capacity for ammonia nitrogen removal. The amount of ammonia nitrogen adsorbed by zeolite A was 0.256 mg/g at 1 minute after the experiment was initially conducted and slightly stable at 0.275 mg/g after 10 minutes. The adsorption experiments were carried out at 0.25, 0.5, 1.0, 2.0, 4.0, and 8.0 mg-N/l of ammonia nitrogen concentration. The results indicated that zeolite A had the adsorption capacity of 0.102, 0.294, 0.551, 1.153, 2.303, and 3.897 mg/g respectively at equilibrium time. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. Based on R<sup>2</sup>, Freundlich model was more promising to represent the adsorption data than Langmuir model. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Catalytic wet-air oxidation of aniline removal from synthetic wastewater(2014-01-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Adsorption of free fatty acid from crude palm oil on magnesium silicate derived from rice husk(2011-08-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Methanol dehydration to dimethyl ether over strong-acid-modified diatomite catalysts(2016-11-01); Neramittagapong, ArthitDimethyl ether synthesis via methanol dehydration over strong-acid-modified (with sulfuric, hydrochloric and nitric acid) diatomite (DM) catalysts was conducted in a fixed-bed reactor with elevated temperature reaction from 250 to 350°C. The modified DM catalysts were characterized by using X-ray diffraction, scanning electron microscopy, fourier transform infrared spectroscopy, fourier transform Raman spectroscopy, temperature-programmed desorption of ammonia, temperature-programmed of carbon dioxide, thermal gravimetric analysis, and solid-state 27Aluminum magic angle spinning/nuclear magnetic resonance spectroscopy. It was found that sulfuric-acid-modified DM catalyst yielded the highest DME selectivity (~99%). It was also revealed that methanol conversion depended on Al ions. The methanol conversion increased with Al<sup>(IV)</sup> but decreased with Al<sup>(V)</sup> and Al<sup>(VI)</sup>. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optimizing Decolorization Efficiency of Methylene Blue by Photo-Fenton Process over Fe-Diatomite using Central Composite Design(2018-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Adsorption of FFA, soap and glycerine in biodiesel using magnesium silicate(2015-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dimethyl ether synthesis via methanol dehydration over BEA zeolite from bagasse fly ash with zircronium- and nickel-ion exchange(2014-01-01);