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Tail-gas treating catalysts

Refineries and gas plants worldwide have reported lower operating costs, extended cycle lengths and reduced pressure drops as a result of installing Criterion’s state-of-the-art catalysts in their Claus tail-gas treating units. Well-operated Claus tail-gas units are increasingly important as operators strive to meet their sulphur emissions mandates. Although these processes can provide greater than 99.9% sulphur recovery, careful selection of the catalyst is necessary to ensure optimum performance and process economics.

CATALYST SELECTION
When selecting a Claus tail-gas catalyst, there are three key aspects to consider.

Cost: Criterion’s low bulk density C-234 catalyst offers the optimal balance between cost and activity

Pressure drop: Criterion’s C-534 and C-734 catalysts offer low start-of-run (SOR) pressure drop performance, unsurpassed in the industry (see Figure 1), which maximises the cycle time between catalyst replacements.

Activity: Criterion’s C-734 catalyst offers top-tier activity for lower temperature conversion of sulphur dioxide (SO2), carbonyl sulphide (COS) and carbon disulphide (CS2) to hydrogen sulphide (H2S).

Other Literature

Catalysts for improved lubricating oil

Catalyst performance is paramount in producing high-value lubricants. Refiners trust catalysts from Criterion Catalysts & Technologies (Criterion) to deliver high yields of top-quality base oils. Consequently, our products are to be found in lubricant plants across the world.

Lubricant ...


Diesel dewaxing catalysts

Maximising middle distillate yields while maintaining excellent cold flow properties. In recent years, diesel dewaxing has emerged as a powerful
technique for meeting product specifications and creating additional margin.

To avoid wax compounds crystallising out and causing engine ...


Criterion Catalysts & Technologies focus on performance

Considerable resourcefulness is required to run a refinery profitably when faced with shifting product demand patterns, tighter specifications, rising energy costs, tougher environmental regulations and variable crude quality.

At the same time, the world order is changing. The economic ...


ASCENT™ DC-2534: performance that delivers greater value for your investment

Refiners who are planning to replace their ULSD catalysts have important decisions to make. The factors they must consider include catalyst performance, hydrogen consumption and catalyst regeneration/reuse options, all of which will have a direct bearing on their costs and the economic value of their ...


Transforming ULSD economics

The ability to produce diesel containing less than 10-ppm sulphur is no longer a differentiator in most  markets. Progressive refiners are pushing to make  ultra-low-sulphur diesel (ULSD) with improved fuel  properties from tougher feedstocks and often within  tight hydrogen budgets. ...


Residue upgrading using fixed-bed hydroconversion

Dealing more effectively with the bottom of the barrel is high on the refining industry’s agenda for a several reasons. Crude oil feedstocks are becoming heavier, which is making lighter crudes more expensive. Environmental pressures are undermining the market for heavy fuel oil. In addition, the ...


Residue upgrading using ebullated-bed hydrocracking

Dealing more effectively with the bottom of the barrel is high on the refining industry’s agenda for the following reasons. Crude oil feedstocks are becoming heavier, which is making lighter crudes more expensive. Environmental pressures are undermining the market for heavy fuel oil. In addition, ...


SENTRY Guard Portfolio

Protect your catalyst. Protect your bottom line. Opportunity feed sources have extended the range of poisons that hydroprocessing unit operators must face. Many of the contaminants can cause severe catalyst poisoning, even at very low concentrations. Catalyst contamination negatively impacts your return ...


FCC pretreatment catalysts

High-performance catalyst systems tailored to meet refiners’ operating objectives. Refiners worldwide are reporting significantly enhanced refinery economics after working with Criterion Catalysts & Technologies to optimise the performance of their fluidised catalytic cracking (FCC) pretreatment ...


Naphtha hydrotreating catalysts

Dealing with the more challenging streams. Criterion is a world-leading supplier of naphtha hydrotreating catalysts, the key to the effective removal of sulphur and nitrogen compounds from this valuable refinery stream. We supply about one-third by weight of all the naphtha hydrotreating catalyst purchased ...