{"id":1257,"date":"2026-04-28T07:10:06","date_gmt":"2026-04-28T07:10:06","guid":{"rendered":"https:\/\/rtooxidizer.com\/?post_type=product&p=1257"},"modified":"2026-04-28T07:13:37","modified_gmt":"2026-04-28T07:13:37","slug":"sulfur-resistant-catalysts-for-sulphur-containing-voc-removal","status":"publish","type":"product","link":"https:\/\/rtooxidizer.com\/kk\/product\/sulfur-resistant-catalysts-for-sulphur-containing-voc-removal\/","title":{"rendered":"Sulfur-Resistant Catalysts for Sulphur-Containing VOC Removal"},"content":{"rendered":"
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Sulfur-Resistant Catalysts for Sulphur-Containing VOC Removal<\/h2>\n

Ever-power sulfur-resistant catalysts are engineered to destroy volatile organic compounds in sulphur-laden waste gas streams without the runaway sulphate poisoning that cripples conventional precious-metal monoliths. The flagship VOCat 300S and VOCat Type III formulations deliver VOC decomposition above 99%, hold SO2 to SO3 conversion below 15% across the full operating window, and run for years in phthalic anhydride, refining and viscose fibre plants where sulphur partial pressures would otherwise force frequent catalyst changeouts.<\/p>\n

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\"Ever-power<\/div>\n
\"Performance<\/div>\n<\/div>\n

Why Sulphur Defeats Standard VOC Catalysts<\/h2>\n

Conventional VOC catalysts based on Pt-Pd on alumina suffer two failure modes when sulphur is in the feed. First, alumina readily forms aluminium sulphate at the active site, blocking VOC adsorption. Second, oxidising platinum sites convert SO2 into SO3, which then condenses as sulphuric acid mist downstream and corrodes ductwork, fans and stack liners. Ever-power sulfur-resistant catalysts solve both problems with a tailored support, controlled precious metal dispersion and an active phase that resists sulphate formation while suppressing the SO2 to SO3 reaction.<\/p>\n

\"Sulfur-resistant<\/div>\n

Three Performance Benefits in One Catalyst<\/h2>\n
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99%<\/div>\n
VOC Decomposition<\/div>\n
Up to 99% destruction of o-xylene, MA, PA, naphthalene and aromatic VOCs at GHSV 20,000 to 60,000 h-1.<\/div>\n<\/div>\n
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\u226415%<\/div>\n
SO2 to SO3 Conversion<\/div>\n
Suppressed sulphur trioxide formation prevents acid mist, ammonium bisulphate fouling and downstream corrosion.<\/div>\n<\/div>\n
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5+ yr<\/div>\n
Long Service Life<\/div>\n
Field-validated stability of 5 years and longer in phthalic anhydride tail-gas duty, with regeneration options at end of life.<\/div>\n<\/div>\n<\/div>\n

VOCat Catalyst Specifications for Phthalic Anhydride Industry<\/h2>\n

The two flagship sulfur-resistant catalysts cover the high-temperature and standard-temperature operating windows typical of o-xylene phthalic anhydride tail-gas treatment. Both use precious metals on a ceramic honeycomb substrate and share the same 230 CPSI cell density, while their maximum operating temperature, exposure tolerance and typical operating range differ.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Catalyst<\/th>\nVOCat 300S<\/th>\nVOCat Type III<\/th>\n<\/tr>\n<\/thead>\n
Catalytic Active Component<\/td>\nPrecious Metals<\/td>\nPrecious Metals<\/td>\n<\/tr>\n
Application<\/td>\no-Xylene Phthalic Anhydride Process<\/td>\no-Xylene Phthalic Anhydride Process<\/td>\n<\/tr>\n
Substrate<\/td>\nCeramic Honeycomb<\/td>\nCeramic Honeycomb<\/td>\n<\/tr>\n
Typical CPSI (Cells per Square Inch)<\/td>\n230<\/td>\n230<\/td>\n<\/tr>\n
Typical Space Velocity (VHSV)<\/td>\n20,000 to 60,000<\/td>\n20,000 to 60,000<\/td>\n<\/tr>\n
Typical Design Conversion (%)<\/td>\n90 to 99<\/td>\n90 to 99<\/td>\n<\/tr>\n
Max Operating Temperature (\u00b0C \/ \u00b0F)<\/td>\n649 (1,200)<\/td>\n500 (932)<\/td>\n<\/tr>\n
Max Exposure Temperature (\u00b0C \/ \u00b0F)<\/td>\n802 (1,475)<\/td>\n802 (1,475)<\/td>\n<\/tr>\n
Typical Operating Temperature (\u00b0C \/ \u00b0F)<\/td>\n370 to 539 (700 to 1,000)<\/td>\n350 to 480 (600 to 900)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Choosing Between VOCat 300S and VOCat Type III<\/h2>\n
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VOCat 300S<\/strong><\/p>\n

For high-temperature duty up to 649 \u00b0C continuous and 802 \u00b0C transient. Ideal where the tail-gas stream sees pre-heating from a regenerative or recuperative oxidiser, or where occasional thermal excursions occur.<\/p>\n