Vulcan Series Chloride Removal Technology VGP CRT 2000 and ...

5. FAQ: VGP CRT 2000 & 3000
1. Does your catalyst give off any byproducts as a result of the HCl reaction
mechanism ?
No by-products are formed ( eg PCA's - "green oils" or organic chlorides ), however, the
HCl is removed by chemical reaction, resulting in the production of 1 mole of H 2 O and no
C0 2 evolution, as is the case with some competitive chloride guards containing
“carbonates”. This is very important as carbon oxides can have a deleterious impact on
Isomerization catalyst, when the make gas from the catalytic reformer is used as feed gas
to the Isomerization Unit.
2. What is the impact of H 2 O, 1 to 50 ppm, on the catalyst in either the vapor or liquid
phase?
Water concentration: Reasonable quantities of water (0.1 %) are necessary to achieve a
reasonable degree of chloride loading on competitive alumina based adsorbents /
absorbents; however the performance of VGP CRT 2000 & 3000 requires significantly
less water. Thus H 2 O vapor in the aforementioned range will have no mal-affect on the
performance of VGP CRT 2000 & 3000.
3. What will be the impact of higher levels of halogens for short periods of time? Will
the catalyst remove all of the chlorides down to the 0.1 ppm level or will the outlet
concentration increase?
The unique structure and composition of the CRT Series catalyst, based on its
engineered shape with relatively high geometric surface area, allows for fast and
efficient catalytic reaction, with HCl hitting the surface of the catalyst.
Both the low and high temperature CRT catalyst has been specifically formulated to
give an optimum density and high availability of the active ingredients, which means
exceptionally high levels of chloride loading, can be achieved. It is inherent to systems
using reactive adsorption that they will have higher chloride saturation capacities than
systems using chemisorption for HCl removal. Chemisorption based systems can only
count on a monolayer of HCl chemisorbed on to the surface. On the other hand
chemical reaction (reactive adsorption) systems utilize the whole catalyst volume to 'lock
in' the chloride. The HCl mass transfer zone when using VGP CRT 2000 & 3000 is small
in relation to that achieved by competitive materials. It is the combination of realistically
achievable saturation loading and the mass transfer zone that will determine the average
chloride loading at EOR.
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