کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4768304 1424954 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biodiesel production using biguanide-functionalized hydroxyapatite-encapsulated-γ-Fe2O3 nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Biodiesel production using biguanide-functionalized hydroxyapatite-encapsulated-γ-Fe2O3 nanoparticles
چکیده انگلیسی
The main purpose of the present research is to develop an environmentally more attractive process for the production of biodiesel by using a magnetic separable solid catalyst. To achieve this, hydroxyapatite-encapsulated γ-Fe2O3 nanoparticles (HAp-γ-Fe2O3) were prepared, and organic biguanide was then bound to the magnetic carrier via covalent attachments. The magnetic carrier and biguanide-functionalized HAp-γ-Fe2O3 were fully characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) spectra, energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM), vibrating-sample magnetometer (VSM) and nitrogen adsorption-desorption techniques. Results demonstrated that the biguanide was successfully immobilized on the HAp-γ-Fe2O3 without damage to the morphology and structure of the HAp-γ-Fe2O3 carrier. The so-prepared inorganic-organic hybrid nanocomposites exhibited a strong magnetic response and displayed better catalytic activities in the transesterification of soybean oil with methanol for the production of biodiesel. By using the methanol/oil molar ratio of 25:1 and catalyst loading of 3 wt%, the maximum oil conversion of 99.6% was achieved over the solid base catalyst at reflux of methanol after 3 h of reaction. Further, the solid catalyst could be recovered facilely by simple magnetic separation and maintains satisfactory catalytic activity after being recycled for five times.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 210, 15 December 2017, Pages 83-90
نویسندگان
, , ,