در هنگام جستجو کلمه در قسمت عنوان میتوانید کلمات مورد جستجو را با کاراکتر (-) جدا کنید.
کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Gas Processing Journal
- نوع مقاله: Journal Article
- کلمات کلیدی: Gas Hydrate,Kinetics of Formation,Ethane Hydrate,SDS Aqueous Solution,Chemical Affinity
- چکیده:
- چکیده انگلیسی: Â Abstract: In this work, the kinetics of ethane hydrate formation has been studied experimentally and a kinetic model based on chemical affinity has been described for predicting the hydrate growth process in the stirred batch reactor at a constant volume. The experiments were done with both pure water and aqueous solution of sodium dodecyl sulfate (SDS). The effect of SDS on formation kinetics has been investigated in concentrations: 300, 500 and 1000 PPM at different temperatures: 273.15 , 274.15 , 275 .15 and 276 .15 K. Experimental results showed the use of SDS decreases surface tension between the liquid and gas, then the ethane hydrate formation rate is increased, especially in SDS concentration of 500 PPM. The parameters of the model, Ar/RT and tK, were optimized for each experiment. The parameter Ar/RT was obtained a constant value for ethane gas. Acceptable agreement between the experimental and predicted data was generally found, and this model can sufficiently predict the formation pressure. Â Keywords: Gas Hydrate, Kinetics of Formation, Ethane Hydrate, SDS Aqueous Solution, Chemical Affinity
- انتشار مقاله: 26-03-1395
- نویسندگان: Maryam Karamoddin,Farshad Varaminian,Maryam Daraee
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Environmental Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Photocatalytic degradation,Clinoptilolite Zeolite-Silver,Diazinon,Microwave Irradiation,photocatalytic reactor
- چکیده:
- چکیده انگلیسی: photocatalytic reactor was tested in the degradation of diazinon in water using photocatalyst clinoptilolite zeolite-silver. The photocatalyst clinoptilolite zeolite-silver was synthesized using a microwave energy technique. The influence of AgO in the photocatalytic reactor was investigated for diazinon treatment. The prepared photocatalyst was authenticated by X-Ray Diffraction (XRD), for Field Emission Scanning Electron Microscope (FESEM), Brunner-Emmet-Teller (BET), and Diffuse Reflectance Spectroscopy (DRS) analysis methods. Every one of the mixtures was analyzed using XRD, and the three distinctive peaks (2Ɵ = 9.84, 11.17, and 22.35) of clinoptilolite were chosen for which the calculations of the peak intensity summation were done. The experiments appraised the influence of various empirical factors, e.g., pH, photocatalyst dosage, initial diazinon, and irradiation time on the degradation efficiency. The results showed that the optimum conditions for diazinon degradation were a pH of 9, photocatalyst dosage of 1 g/L and irradiation time of 120 min. The point of zero charge (pzc) of the photocatalyst clinoptilolite zeolite-silver, the point when the surface charge density is zero, was identified to be 8. This excellent catalytic ability was mainly attributed to the hybrid effect of the photocatalyst and adsorbent.
- انتشار مقاله: 19-05-1397
- نویسندگان: Milad Hallajiqomi,Mohsen Mehdipour Ghazi,Farshad Varaminian
- مشاهده