The Application segment of the Honeycomb Zeolite Molecular Sieve market is divided into five primary categories that collectively drive demand. Gas separation—including CO₂ capture, hydrogen purification, and nitrogen generation—accounts for roughly 35% of market revenue, reflecting its critical role in energy transition and refinery optimization. Water treatment follows with an estimated 30% share, as honeycomb structures enable high‑flow, low‑pressure adsorption for municipal and industrial desalination, heavy‑metal removal, and wastewater recycling. Petrochemical processing contributes about 20%, where the sieves are employed in catalytic cracking and hydrocracking streams to improve selectivity and catalyst life. Air purification—covering indoor air quality, VOC abatement, and HVAC filtration—holds a 10% slice, driven by stricter environmental regulations. The residual 5% is classified as Other applications, encompassing specialty uses such as gas‑filled lighting and laboratory gas standards. This distribution underpins the overall market size, with each application’s growth trajectory influencing capacity expansion and pricing dynamics. The phrase "Honeycomb Zeolite Molecular Sieve segmentation" is integral to analytical reporting of these trends.