کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9952619 | 1455934 | 2018 | 56 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Vapor separation of methanol-dimethyl carbonate mixture on SAPO-34 zeolite membrane
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Vapor separation of methanol-dimethyl carbonate mixture on SAPO-34 zeolite membrane Vapor separation of methanol-dimethyl carbonate mixture on SAPO-34 zeolite membrane](/preview/png/9952619.png)
چکیده انگلیسی
The separation of methanol-dimethyl carbonate (DMC) is an important but challenging process. Polymer membranes suffered from poor separation performance and stability. High performance SAPO-34 zeolite membrane was prepared on porous α-alumina supports with oil-bath heating method. Vapor separation of methanol-DMC mixtures on SAPO-34 membranes was systematically studied, including pressure drop, feed composition, temperature, flow rate, membrane degradation etc. SAPO-34 membranes demonstrated outstanding vapor separation performance, with methanol flux ~ 15â¯kg/(m2 h) and methanol/DMC separation factor ~ 1000 at 403â¯K and 0.6â¯MPa pressure drop for 90methanol:10DMCwt% feed. SAPO-34 membranes exhibited great stability in ~ 20â¯d continuous test. Methanol flux decreased substantially with time but it can be recovered to 80% of original value by a simple methanol rinse. Methanol/DMC separation factor exhibited significant increase with time, which can be attributed to the defect blocking by the chemical bonding of DMC in the defects, as verified by XPS and FT-IR analysis. Too much DMC adsorption on crystal surface hindered the free permeation of methanol. The methanol adsorption induced expansion of SAPO-34 crystals also helped shrinking defects effectively, which contributed to high separation factor. The addition of 1% water in the feed had little impact on separation performance. Compared with polymer membranes and other inorganic membranes, SAPO-34 membranes exhibited significantly improved flux and separation factor for the vapor separation of methanol-DMC mixture.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 565, 1 November 2018, Pages 311-321
Journal: Journal of Membrane Science - Volume 565, 1 November 2018, Pages 311-321
نویسندگان
Mingquan Wang, Meng Li, Na Chang, Liyue Gao, Mengxin Wang, Yanfeng Zhang,