کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7063139 | 1459800 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fatty acid methyl ester production from wet microalgal biomass by lipase-catalyzed direct transesterification
ترجمه فارسی عنوان
تولید متیل استر اسید چرب از زیست توده میکروالگال مرطوب به وسیله ترانس اکسیداسیون مستقیم لیتاز کاتالیز شده
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
The aim of this work was to optimize the production of fatty acid methyl ester (FAME, biodiesel) from wet Nannchloropsis gaditana microalgal biomass by direct enzymatic transesterification. This was done in order to avoid the high cost associated with the prior steps of drying and oil extraction. Saponifiable lipids (SLs) from microalgal biomass were transformed to FAME using the lipase Novozyme 435 (N435) from Candida antarctica as the catalyst, and finally the FAME were extracted with hexane. t-Butanol was used as the reaction medium so as to decrease lipase deactivation and increase mass transfer velocity. A FAME conversion of 99.5% was achieved using wet microalgal biomass homogenized at 140Â MPa to enhance cell disruption, a N435:oil mass ratio of 0.32, methanol added in 3 stages to achieve a total of 4.6Â cm3Â gâ1 of oil and 7.1Â cm3Â gâ1 oil of added t-butanol, with a reaction time of 56Â h. The FAME conversion decreased to 57% after catalyzing three reactions with the same lipase batch. This work shows the influence of the polar lipids contained in the microalgal biomass both on the reaction velocity and on lipase activity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 93, October 2016, Pages 6-12
Journal: Biomass and Bioenergy - Volume 93, October 2016, Pages 6-12
نویسندگان
Elvira Navarro López, Alfonso Robles Medina, Luis Esteban Cerdán, Pedro A. González Moreno, MarÃa D. MacÃas Sánchez, Emilio Molina Grima,