tailieunhanh - Báo cáo nghiên cứu khoa học: " EXPERIMENTAL AND THEORETICAL ANALYSIS OF A CRITICAL CHEMICAL REACTION: DECOMPOSITION OF HYDROGEN PEROXIDE (H2O2)"

Sự phân hủy của hydrogen peroxide được nghiên cứu bằng cách sử dụng một giải pháp phản ứng của sắt (III) Nitrate được sử dụng như một chất xúc tác đồng nhất. Tốc độ phản ứng đã được định lượng từ quá trình của thông lượng nhiệt do phản ứng đo được trong thí nghiệm. | Science Technology Development Vol 11 - 2008 EXPERIMENTAL AND THEORETICAL ANALYSIS OF A CRITICAL CHEMICAL REACTION DECOMPOSITION OF HYDROGEN PEROXIDE H2O2 Mai Thanh Phong 1 Carolina de Barros Aires 2 1 University of Technology VNU-HCM 2 O-v-G Magdeburg University Germany Manuscript Received on January 10th 2008 Manuscript Revised May 12th 2008 ABSTRACT The decomposition of hydrogen peroxide was studied using a reaction calorimeter. The solution of Iron III Nitrate was used as a homogeneous catalyst. The reaction rate was quantified from the course of the heat flux due to reaction measured during the experiments. To this end the reaction rate was modeled as a a first order reaction and b an mth order reaction. The studies showed that the obtained results based on the assumption of a first order reaction were not good as expected while the model based on mth order kinetics provided much better results and the experimental data could be well described. 1. INTRODUCTION The main role of hydrogen peroxide in the actual industry and the versatility that this compound presents to be used as an intermediate in many processes and also the use of hydrogen peroxide in the remediation of soils and wastewater treatment is one of the motivations for this work. The catalyzed decomposition of the hydrogen peroxide is a subject of study to many researchers around the world. There have been several researches on the decomposition catalyzed by iron compounds. Chou and Huang 1 studied this decomposition catalyzed by iron oxide in a fluidized bed reactor. Lin and Gurol 2 studied the effects of goethite as a catalyst to the same reaction. De Laat and Gallard 3 investigated the kinetics of the homogeneous decomposition by ferric ion. All the studies cited the importance of this reaction especially to the wastewater treatment. Several models that describe the kinetics of reaction were previously presented. This work intends to analyze the kinetics of the homogeneously catalyzed .