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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 on investment, which is why Criterion Catalysts & Technologies (Criterion) has committed unique R&D resources to solve the contaminant problems you face every day.

Criterion offers SENTRY™ Guard Catalysts and Support an entire portfolio of products dedicated to protecting hydroprocessing operations from feedstock contaminants. SENTRY offers prevention, diagnosis and resolution of contamination issues — protecting your catalyst investment and, ultimately, your bottom line.

Better Science, Better Solutions
A better solution starts with a better diagnosis; but since each case has individual challenges, diagnosis can take many paths. Criterion’s experts use unique research facilities to conduct in-depth analyses to aid in determining the underlying root cause of the problem, enabling the formulation of appropriately customised solutions.

Better Diagnosis: Feedstock Poison Detection
An often elusive detail of diagnostic analysis is proper characterisation of contaminants. SENTRY includes innovative methods of feedstock characterisation capable of identifying contaminants in the parts-per-billion range. Such ultra-low detection of feed poisons allows proactive and relevant monitoring of contaminants.

Better Science: Focused Research and Development
A better diagnosis allows better application of science. Mitigation of reactor fouling and feed poison problems in hydroprocessing units has historically been trial and error, partly because the science had not been developed sufficiently to provide robust solutions. Criterion has focused R&D programs to extend current understanding of feed-poisoning and reactor-fouling mechanisms. A unique pilot plant at our Amsterdam research laboratory extends basic deep-bed filtration theory to hydroprocessing catalysts. This innovative work is further enhancing the effectiveness of the developed grading systems, and together with our industry experience serves as the backbone of the SENTRY reactor fouling portfolio and application guidelines.

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 ...


ASCENTâ„¢ 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) ...


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 ...