کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
145417 456340 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of calcination temperature on the catalytic activity of VPO for aldol condensation of acetic acid and formalin
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Effect of calcination temperature on the catalytic activity of VPO for aldol condensation of acetic acid and formalin
چکیده انگلیسی


• VPO catalysts were developed for one step synthesis acrylic acid with HAc and HCHO.
• The influence of calcination temperature on VPO catalysts was studied.
• Larger surface area and higher V4+/V5+ ratio favored higher yield of main product.
• The catalyst deactivation was explored using XPS method.

The effect of calcination temperature on the catalytic activity of VPO catalyst for one step synthesis acrylic acid with acetic acid and formalin was systematically studied using a fixed-bed tubular micro-reactor. The influence of calcination temperature on physicochemical properties especially crystal phase structure of VPO catalysts was obtained. The catalysts were analyzed and characterized with in situ high temperature XRD (HT-XRD), BET, TEM, TG/DTA, XPS, as well as NH3, CO2-TPD, and pyridine-FTIR methods. Larger special surface area and higher V4+ concentration favored higher conversion and selectivity. The optimum special surface area and IV4+/IV5+ ratio was obtained with controlling calcination temperature. The catalyst deactivation was also explored.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 300, 15 September 2016, Pages 160–168
نویسندگان
, , , , ,