کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5746330 1618800 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Adsorption behavior of levulinic acid onto microporous hyper-cross-linked polymers in aqueous solution: Equilibrium, thermodynamic, kinetic simulation and fixed-bed column studies
ترجمه فارسی عنوان
رفتار جذب اسید لولولینیک بر روی پلیمرهای میکروپروسسنجی شده در محلول های آبی: مطالعات تعادل، ترمودینامیک، شبیه سازی جنبشی و ستون ثابت
کلمات کلیدی
اسید لووولینیک، جذب، ایزوترم شبیه سازی سینتیک، ستون ثابت ثابت
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- The feasibility of LA separation by a hyper-crossed-linked polymer was verified.
- The equilibrium, kinetic and thermodynamic properties of LA adsorption was studied.
- The process of LA from actual biomass hydrolysate was studied for the first time.
- The concentration of LA in the eluent was increased by 2.97 folds.

The recovery of levulinic acid (LA) from aqueous solution and actual biomass hydrolysate by a microporous hyper-cross-linked polymer, SY-01, was investigated for the first time under batch and fixed-bed column conditions. The results showed that the optimum pH should be in the acidic range (pH < 3.0) without adjusting the pH. In the single-component system equilibrium study, the Langmuir isotherm model fits the LA adsorption onto SY-01 resin better than the Freundlich isotherm model, indicating that LA adsorption onto SY-01 resin under the concentration range studied is a monolayer homogeneous adsorption process. The maximum adsorption capacity of LA onto SY-01 resin decreased with increasing temperature, ranging from 103.74 to 95.70 mg/g. The obtained thermodynamic parameters suggested that the adsorption of LA on SY-01 was spontaneous (ΔG0<−3.788 kJ/mol), and exothermic (ΔH0 = −11.764 kJ/mol). For kinetic study, the adsorption of LA onto SY-01 resin at various operating conditions follows the pore diffusion model and the intraparticle diffusion is the rate-limiting step for the adsorption of LA onto SY-01 resin. The effective pore diffusivity was dependent upon temperature, but independent of initial LA concentration, and were 3.306 × 10−10, 5.274 × 10−10 and 7.707 × 10−10 m2/s at 298, 318 and 338 K, respectively. In desorption process, the recovery efficiency of LA from SY-01 resin was 99.39%, and LA concentration in the eluent was raised 2.97-fold. In conclusion, our results show that the SY-01 resin has potential application in product recovery of LA from biomass hydrolysate.

212

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 171, March 2017, Pages 231-239
نویسندگان
, , , , , , , ,