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Ethanol dehydration catalyst

Hits: 1 Time: 2025-02-28

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1、Overview

Ethanol dehydration to ethylene (ETO) technology is a green technology that uses ethanol as a raw material to catalyze dehydration to produce polymer grade ethylene. The research on ethanol to ethylene project began in 1982. In 1983, JT-II type isothermal bed ethanol dehydration catalyst was developed, and in 2005, a complete set of process technology for 6000 tons/year isothermal bed ethanol dehydration to ethylene was developed and converted. In order to meet the needs of large-scale equipment, a multi-stage adiabatic bed reaction catalyst and process research was conducted at Shanghai Petrochemical in October 2006. In 2014, a 3000 ton/year adiabatic bed industrial test was completed and passed the project acceptance. Based on this, a complete set of technology for 10000 ton bio based ethylene energy-saving and 10000 ton level adiabatic bed ethanol dehydration to produce ethylene was successfully developed.

2、Complete technology for ethanol dehydration to produce ethylene

We have developed a complete set of process technologies with the core of tubular isothermal bed and multi-stage adiabatic fixed bed, using independently developed JT-II and SETO-1 adiabatic catalysts with international advanced level, including the following four items: ① Fixed bed reaction process technology; ② Reaction gas washing technology; ③ Low temperature ethylene separation technology; ④ Full process simulation technology. Its technical features are as follows:

(1) Good process flexibility: Enterprises can adopt the isothermal bed process or adiabatic bed process according to their scale and needs, and can choose the appropriate product refining process according to the requirements of product quality;

(2) Green and low-carbon: Bioethanol can be used as a raw material to achieve renewable utilization of resources;

(3) Energy saving optimization: Considered the heat recovery and utilization of reaction products to reduce device energy consumption;

(4) High product quality: The product has a high concentration of ethylene, which can be refined to obtain polymer grade ethylene.

3、Ethanol dehydration to ethylene series catalyst

The main promoted grades of catalysts for ethanol dehydration to ethylene currently include JT-II isothermal catalyst and SETO-1 adiabatic catalyst. The main product features are as follows:

(1) Strong adaptability of raw materials: Catalysts can adapt to different concentrations of ethanol;

(2) High activity: The catalyst has a lower reaction temperature than similar catalysts;

(3) High selectivity: The ethylene concentration in the dehydrated water product of the catalyst reaches 99.7%;

(4) High stability: The lifespan of the JT-II catalyst can reach 18 months, and the lifespan of the SETO catalyst can reach 24 months, maintaining reaction performance during operation;

(5) Environmentally friendly: The catalyst has no harmful or corrosive components, and does not pollute the environment.

4、Promote application

5 sets of ETO and other hotbed ethanol dehydration to ethylene technologies have been licensed. In 1988, the first 3000 ton/year ethylene technology license was granted, followed by licenses for 500 ton/year and 3000 ton/year scale ethanol dehydration to ethylene units. In 2005 and 2006, complete process technologies for 6000 ton/year ethanol dehydration to ethylene units were respectively licensed.