کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
687017 1460118 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Direct injection of superheated steam for continuous hydrolysis reaction
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Direct injection of superheated steam for continuous hydrolysis reaction
چکیده انگلیسی

The primary intent for previous continuous hydrolysis studies was to minimize the reaction temperature and reaction time. In this work, hydrolysis is the first step of a proprietary chemical process to convert lipids to sustainable, drop-in replacements for petroleum based fuels. To improve the economics of the process, attention is now focused on optimizing the energy efficiency of the process, maximizing the reaction rate, and improving the recovery of the glycerol by-product. A laboratory-scale reactor system has been designed and built with this goal in mind.Sweet water (water with glycerol from the hydrolysis reaction) is routed to a distillation column and heated above the boiling point of water at the reaction pressure. The steam pressure allows the steam to return to the reactor without pumping. Direct injection of steam into the hydrolysis reactor is shown to provide favorable equilibrium conditions resulting in a high quality of FFA product and rapid reaction rate, even without preheating the inlet water and oil and with lower reactor temperatures and lower fresh water demand. The high enthalpy of the steam provides energy for the hydrolysis reaction. Steam injection offers enhanced conditions for continuous hydrolysis of triglycerides to high-purity streams of FFA and glycerol.


► Direct injection of steam into hydrolysis reactor shows good promise.
► Accelerates continuous hydrolysis for conversion of lipids to drop-in fuels.
► Improves energy efficiency, increases reaction rate, and recovers glycerol.
► Steam's high enthalpy drives hydrolysis reaction and supplies all reactor heat.
► Concentrates glycerol with no theoretical energy conversion penalty.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering and Processing: Process Intensification - Volume 59, September 2012, Pages 52–59
نویسندگان
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