Search Results

You are looking at 21 - 28 of 28 items for :

  • "Coke formation" x
  • Refine by Access: All Content x
Clear All

different SiO 2 /Al 2 O 3 ratios converted glucose into LA with 36% yield at 453 K in an autoclave for 8 h [ 12 ]. The use of pillared clay catalysts for the dehydration of glucose gave a low LA selectivity (20%) [ 13 ] because of a coke formation. Chen et

Restricted access

against sintering or coke formation, considerable effort focuses on improving the dehydrogenation step. Hydrogen is produced by steam reforming fossil fuels such as natural gas or naphtha. In this process, reformed and shift reacted hydrogen

Restricted access

was studied. Alwahabi [ 10 ] developed very detailed reaction kinetics based on the single-event theory in terms of SAPO-34 catalyst with the consideration of the coke formation which was assumed to be the result of large molecules trapped inside the

Restricted access

conversion over 320 °C can be attributed to predominance of dealkylation over alkylation at higher temperatures, and blocking of the active sites [ 19 ]. Additionally, it is well known that coke formation inhibits the alkylation of phenol and its derivatives

Restricted access
Reaction Kinetics, Mechanisms and Catalysis
Authors: Bianca V. Sousa, Karoline D. Brito, José J. N. Alves, Meiry G. F. Rodrigues, Carlos M. N. Yoshioka, and Dilson Cardoso

, relatively high temperatures (250 °C) are used to form carbocations, which are necessary for the isomerization reactions of C 5 /C 6 . For extended paraffin chains such as the n -heptanes, the cracking reaction occurs faster, it is accompanied by coke

Restricted access

prepared from H 2 PtCl 6 precursor. They present highly acidic surface resulting in ring opening and toluene cracking leading to coke formation [ 19 ]. Also, reactivation is found to be purge rate dependent. As adsorption decreases with an increase in

Restricted access

Waste and fuels from waste

Part I. Analysis of thermal decomposition

Journal of Thermal Analysis and Calorimetry
Authors: Danuta Król and Sławomir Poskrobko

transformations with the use of TG/MS technique, to estimate the energetic suitability of pyrolysis products of fuels mentioned below. As a first step we identify the process of coke formation by the speed of mass loss (TG curves) and the temperature range of main

Restricted access

period of 12 h. The unchanged profiles of DPM conversion and BP, benzhydrol, benzoic acid and benzene selectivities demonstrate that there is either no coke formation or oxidation of coke formed by catalyst during the reaction itself. The used catalyst

Restricted access