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Method for adsorptive removal of metal carbonyls from gas flows

A carbonyl compound and gas flow technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve problems such as reducing catalyst life

Pending Publication Date: 2021-07-30
CLARIANT INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High gas flux means that even Fe(CO) 5 Concentrations as low as the ppb range are also sufficient to significantly reduce catalyst lifetime

Method used

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  • Method for adsorptive removal of metal carbonyls from gas flows
  • Method for adsorptive removal of metal carbonyls from gas flows
  • Method for adsorptive removal of metal carbonyls from gas flows

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1: Adsorbent used

[0082] Adsorbent A

[0083] Used as adsorbent A was a spherical shaped body having an average diameter of 2.8 mm and comprising zeolite X having a Si / Al atomic ratio of 1.14, and containing no binder.

[0084] Adsorbent B

[0085] Used as adsorbent B was a spherical shaped body having an average diameter of 3.9 mm and comprising zeolite X having an Si / Al atomic ratio of 1.20 and a binder fraction in the form of clay material of 20% by weight.

[0086] Adsorbent C

[0087] Used as adsorbent C was a spherical shaped body having an average diameter of 3.5 mm and comprising zeolite X having an Si / Al atomic ratio of 1.40 and a binder fraction in the form of clay material of 15% by weight.

[0088] Adsorbent D

[0089] Used as the adsorbent D was a spherical shaped body having an average diameter of 1.6 mm and comprising zeolite Y having a Si / Al atomic ratio of 2.50 and containing no binder.

[0090] The properties of adsorbents A to D are sho...

Embodiment 2

[0091] Embodiment 2: adsorption test

[0092] Study the Fe(CO) of the adsorbent provided in Example 1 5 of adsorption capacity.

[0093] For this purpose, the sorbent is first crushed and a sieve fraction with a diameter in the range of 710 to 1000 μm is separated for the measurement.

[0094] For the adsorption measurements, the reactors were filled with adsorbent to the same bulk volume of 10 mL in each case. The reactor is then heated to a temperature of 230 °C, and at this temperature and a pressure of 40 bar, will contain 4.0 ppmv of Fe(CO) 5 , 62.0% by volume of H 2 , 27.7% by volume of CO, 2.5% by volume of CO 2 and 7.8 vol% N 2 The gas flow at 45 000h -1 The GHSV feeds through the bed of adsorbent from above.

[0095] Measurement of Fe(CO) downstream of the gas outlet of the reactor 5 concentration, and thus determine the breakthrough curve, which is shown in figure 2 middle.

[0096] figure 2 Shown is the breakthrough of sorbents A to C, i.e., Fe(CO) in t...

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Abstract

The invention relates to a method for the adsorptive removal of metal carbonyls from a gas mixture comprising CO, CO2 and H2, characterized in that an adsorbent used comprises an X zeolite.

Description

technical field [0001] The present invention relates to a method for extracting from CO, CO 2 and H 2 The method for adsorbing and removing metal carbonyls in a gas mixture is characterized in that the adsorbent used includes zeolite X. Background technique [0002] Gas rheotransformation on an industrial scale is extensively performed using heterogeneous catalysts. These catalysts react sensitively in some cases to impurities present in the gas stream. Such impurities can be adsorbed by the catalyst and thus drastically reduce its catalytic properties. [0003] An important aspect of industrial processes for converting gas streams therefore consists in removing impurities from the gas stream before they come into contact with the catalyst. [0004] A problem especially in the field of methanol synthesis starting from syngas streams is the presence of carbonyls such as Fe(CO) 5 or Ni(CO) 4 , they are formed by the reaction of CO in the syngas stream with the stainless ...

Claims

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Application Information

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IPC IPC(8): C10K1/32
CPCC10K1/32B01D53/04B01D2253/108B01D2256/16B01D2256/20B01D2256/22B01D53/02Y02C20/40
Inventor S·雷特麦尔M·赖辛格
Owner CLARIANT INT LTD