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Catalytic Distillation for the Synthesis of Tert-Butyl Alcohol with Structured Catalytic Packing

Author: YangYang
Tutor: LeiZhiGang
School: Beijing University of Chemical Technology
Course: Chemical Engineering
Keywords: Catalytic Distillation Tert-butyl alcohol Dynamics Mathematical model Process optimization Structured packing
CLC: TQ223.124
Type: Master's thesis
Year: 2010
Downloads: 176
Quote: 2
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Abstract


T-butanol is an important fine organic chemicals, can be used for gasoline additives to enhance the gasoline octane number , has become a more promising alternative fuels tert-butoxide to the performance and cost of use is better than the current ethanol ethanol fuel alternatives . The current ethanol obtain grain fermentation method is not suitable for China's national conditions and long-term development , and tert- butanol places cheap water mixed C4 hydrocarbons containing isobutylene refinery FCC reaction - separation obtained as raw material . Therefore, the catalytic distillation technology synthesis of tert -butanol , is of great significance for improving our refinery mixed C4 hydrocarbon resources effective utilization and development of the gasoline substitute . Improve the traditional production process , added in the reaction zone of the catalytic distillation column structured packing , and the use of catalytic distillation technology C4 mixture of isobutylene hydration synthetic tert-butanol . First, in a kettle-type stirred reactor were measured by the ion exchange resins have the Strapping and no bales reaction kinetics . The kinetic equation and the efficiency of the catalyst bales factor classified among the mathematical model of the catalytic distillation column . Then, using ASPEN PLUS software RadFrac model for the entire process simulation and optimization, to determine the optimum operating conditions (e.g. , reflux ratio , feed location , etc. ), to optimize the energy consumption of the system-wide , looking the multiple stationary state may occur . The results showed that , to improve processes isobutylene conversion rate increased to 67.7% of 60% of the original process , per unit of product , the total energy consumption of the reboiler 4.72% . Finally , the use of cold model experimental device measured structured packing transfer characteristics , including fluid dynamics and mass transfer performance , compared with traditional catalyst bulk packing pressure drop . The results show that , when the spray density of the filler is constant , the pressure drop of the column is increased with the increase of the gas kinetic energy factor and ; When the gas velocity is constant , the pressure drop of the column is increased with increasing density of the liquid spray large. Contrast structured packing by calculating the voltage drop is far less than the pressure drop of the catalyst packing in the solid bulk , which fully reflects the characteristics of the low pressure drop of structured packing .

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CLC: > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of aliphatic compounds ( acyclic compounds) > Aliphatic alcohols (alcohols, hydroxy compounds) and its derivatives > Aliphatic alcohol > Fatty Alcohols > Butanol
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