How catalyst accessibility, matrix activity, and operating strategy can help refiners shift more value into distillates.

For many FCC operators, light cycle oil, or LCO, is a way to improve refinery economics. But maximizing LCO is not as simple as lowering conversion. The best strategies balance yield goals with product quality, unit constraints, coke selectivity, LPG olefinicity, gasoline octane and total profitability.

The challenge is upgrading heavier material without overcracking valuable products. Catalyst design gives refiners another lever: improve selective bottoms upgrading so more heavy molecules move into the LCO boiling range while preserving flexibility across the rest of the slate.

Make Heavy Molecules Easier to Upgrade

A catalyst’s ability to support LCO production is tied closely to accessibility. Large, high-boiling feed molecules must diffuse into the catalyst particle, reach active sites, crack into useful products and diffuse back out before secondary reactions go too far.

High-accessibility catalyst systems are designed to reduce those diffusion barriers. With a more open pore structure and strong matrix activity, they can help convert bottoms into LCO more selectively, especially with heavier or more variable feeds.

Use Matrix Activity to Improve Selectivity

Matrix activity is another key factor in MAX LCO performance. In a well-designed FCC catalyst, the matrix helps crack the largest molecules before they reach the zeolite. That can improve bottoms conversion and increase material in the LCO range instead of leaving it as slurry.

Ketjen’s FCC catalyst technologies combine zeolite, matrix, binders and specialty components to match catalyst performance to the unit objective. For MAX LCO operation, that means designing for strong bottoms cracking, high accessibility, good coke selectivity and flexibility around refinery-specific constraints.

Balance Catalyst Choice with Operating Strategy

Catalyst selection is only one part of an effective LCO strategy. Operators also may adjust feed rate, riser temperature, feed quality, catalyst activity and other variables to influence conversion and product distribution.

That is why MAX LCO work is most effective when catalyst design, operating strategy, technical service and refinery economics are considered together. The best answer depends on distillate value, gasoline balance, LPG demand, hydrotreater capacity, feedstock availability and unit limits.

What Refiners Should Keep in Mind

MAX LCO is ultimately about selective upgrading: converting the right molecules into the right boiling range without sacrificing more valuable products than necessary. High-accessibility, high-matrix FCC catalyst technologies can support that goal while preserving flexibility in LPG, gasoline, octane, coke and dry gas performance.

For refiners evaluating distillate maximization, the most useful question is not simply, “How do we make more LCO?” It is, “How do we make more value?” The answer depends on pairing catalyst technology with practical operating insight, disciplined data analysis and clear market objectives.