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Synthesis gas purification by selective copper adsorbents

A synthesis gas and adsorbent technology, which is used in hydrogen/synthesis gas production, gas treatment, other chemical processes, etc., can solve the problems of low pollutant removal capacity and high residual content of pollutants such as hydrogen sulfide

Inactive Publication Date: 2014-03-05
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The disadvantage of the pre-reduction route is the lower pollutant removal capacity compared to the oxide form of copper
In addition, due to the low equilibrium constant, the residual content of pollutants such as hydrogen sulfide is relatively high

Method used

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  • Synthesis gas purification by selective copper adsorbents
  • Synthesis gas purification by selective copper adsorbents
  • Synthesis gas purification by selective copper adsorbents

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The thermodynamic data summarized in Table 4 show that the logarithm of the equilibrium constant for the S removal process is several orders of magnitude higher than when the Cu component is converted to Cu metal without reduction. This makes it possible to achieve very low residual S in the product with the reduction-resistant sorbents of the invention.

[0047] Table 4

[0048]

Embodiment 2

[0050] Comparing the use of prior art adsorbents and adsorbents of the present invention in a flow reactor with H 2 reduction. Put 30g of adsorbent in temperature programming mode—2°C / min with 5%H 2 –N 2 The gas mixture is heated while the moisture content in the effluent is measured by an FTIR gas analyzer. The inventive sorbent (ADS-INV) was reduced at a higher temperature than the reference sorbent without any chlorine (ADS-REF). The reduction process is followed by the water content in the effluent.

Embodiment 3

[0052] 20 g of adsorbent were pressurized with 2758 kPa (400 psig) hydrogen in a 300 cc autoclave. The pressure drop at ambient temperature is due to the adsorption of the reduction product water on the high surface area support. The graph shows that no pressure drop is observed with the inventive material ADS-INV, whereas a rapid pressure drop is observed with the prior art material ADS-REF.

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Abstract

Effective synthesis gas purification is achieved by applying copper adsorbents which are resistant to the reduction by the components of the synthesis gas H2 and CO at normal operation conditions. The novel adsorbents are produced by admixing small amounts of an inorganic halide, such as NaCl, to the basic copper carbonate precursor followed by calcination at a temperature sufficient to decompose the carbonate. The introduction of the halide can be also achieved during the forming stage of adsorbent preparation. These reduction resistant copper oxides can be in the form of composites with alumina and are especially useful for purification of synthesis gas or gas streams containing hydrogen carbon monoxide or other reducing agents.

Description

[0001] Priority claims from earlier national applications [0002] This application claims priority to US Application No. 13 / 218,031, filed August 25, 2011. Background of the invention [0003] The term synthesis gas refers to varying proportions of carbon monoxide (CO) and hydrogen (H 2 ) mixtures, which usually contain carbon dioxide (CO 2 ) and (H 2 O). The most typical method of synthesis gas production consists of high temperature reforming of natural gas or other hydrocarbon feeds. The syngas is then fed to different catalytic processes, e.g. for catalytic poisons, mainly H 2 S and COS sensitive low and high temperature water shift reactions. Copper-containing catalysts are widely used to catalyze low-temperature water shift reactions. Among them, the water shift reaction, in which carbon monoxide reacts in the presence of steam to produce carbon dioxide and hydrogen, and the synthesis of methanol and higher alcohols, are currently the most skilled catalytic method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/02B01J20/06B01D53/64B01D53/81
CPCB01D2251/602B01D2257/308C01B3/56B01D2251/60B01D2257/602B01J20/3078B01D2253/1124B01D2256/20B01D2251/606B01D2257/306B01D2257/553C01B2203/02B01D2251/604B01D2256/16B01J20/3042C01B2203/042B01D2257/304B01D2253/25B01J20/06B01D53/46B01J20/046B01J2220/42
Inventor V·I·卡纳兹雷夫J·K·格拉瓦拉
Owner UOP LLC