Sinochem New Network News reports that an advanced petrochemical industry technology for the purification of volatile organic compounds (VOCs) in waste gas has been developed by the Fushun Petrochemical Research Institute of Sinopec. This innovative solution recently passed a technical evaluation organized by the China Petroleum and Chemical Industry Union in Beijing. The purified gas meets the national "Integrated Emission Standards for Air Pollutants" (GB16297-1996), with benzene, toluene, xylene, acetaldehyde, and non-methane total hydrocarbons all within acceptable limits. Specifically, the total non-methane concentration is below 30 mg/m³, achieving deep purification of VOCs emissions.
This technology is designed for the deep treatment of VOCs, incorporating innovations in key areas such as process flow, catalysts, and equipment. It includes several specialized processes tailored for different types of VOCs waste gas, such as desulfurization and total hydrocarbon homogenization in petrochemical wastewater treatment plants, absorption and catalytic oxidation for polyester exhaust gases, condensation, defogging, and catalytic oxidation for thermoplastic styrene-butadiene rubber production tail gases, and dual-series catalytic oxidation for propylene oxide/styrene (PO/SM) exhaust gases.
Based on this technology, researchers have developed four new catalytic oxidation catalysts—WSH-1, HBFW-1, WSH-1F, and WSH-2—along with reagents that combine desulfurization and concentration homogenization. In addition, they have created a high-efficiency heat exchanger that combines heat pipes and finned tubes, capable of wide temperature ranges and high heat recovery rates, as well as a large-scale catalytic oxidation reactor.
To date, the technology has secured 50 patents (33 authorized). The methods for treating refinery wastewater gas, PO/SM tail gas, and rubber exhaust gas based on this system have reached international leading standards. So far, 14 sets of catalytic oxidation treatment systems for refinery wastewater, polyester, rubber, and PO/SM exhaust gases have been deployed using this technology. These systems have treated over 4.04 billion cubic meters of waste gas, reducing VOC emissions by 12,500 tons.
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