Photothermal catalytic oxidation of VOCs (volatile organic compounds) technology, as an interdisciplinary frontier between energy conversion and environmental remediation, is increasingly becoming a core route for treating industrial low‑concentration, high‑hazard organic exhaust. For researchers and engineers in the new energy field, the core logic of this technology is to use the synergistic enhancement of light and heat to, from the perspectives of electronic‑state control and reaction‑kinetics optimization, alter traditional catalytic reaction pathways and achieve a “1+1>2” purification effect.
From the physicochemical principle perspective, conventional thermal catalytic oxidation heavily depends on external heat to provide activation energy, activating reactant molecules by heating to overcome thermodynamic barriers; photocatalysis, by contrast, focuses on using photon‑excited strongly oxidizing radicals. Photothermal synergistic catalysis can not only use thermal energy to lower reaction overpotentials but also use photogenerated carriers to improve reaction selectivity, thereby achieving deep mineralization of VOC molecules at relatively mild temperatures. In laboratory‑scale mechanistic studies and catalyst screening, the PLR‑RP series photothermal catalytic reaction evaluation apparatus demonstrates excellent engineering design. The system innovatively employs a quartz light‑column guiding scheme to direct the light source straight to the reaction core, significantly reducing losses during light transmission. Its unique ring‑illumination reactor increases the effective illuminated area of the catalyst from a planar 0.3 cm² to approximately 20 cm², ensuring efficient light penetration while enhancing gas–solid interfacial contact frequency, and providing a standardized evaluation platform for precisely investigating VOCs photothermal synergistic degradation rates.
When the technical solution moves toward industrial application, engineered equipment must address high‑throughput exhaust treatment and in‑situ regeneration challenges. The ZKRT‑D organic exhaust cold‑combustion purification unit offers a mature solution based on adsorption‑driven gas‑phase advanced oxidation. The unit perfectly integrates the rapid enrichment capability of adsorption with the deep‑oxidation power of the UV‑Fenton process, overcoming the drawback of traditional activated‑carbon adsorption technologies that “only transfer, not eliminate.” Through an integrated adsorption‑catalysis design, the equipment can realize in‑situ regeneration of the purification media within a closed loop, avoiding secondary pollution and converting the high‑temperature combustion required by conventional regenerative thermal oxidizers (RTO) into an efficient, low‑energy “cold‑combustion” process. Its built‑in IoT online monitoring system and explosion‑proof safety structure ensure long‑term stable operation in complex industrial environments and laboratory exhaust‑treatment scenarios.
Applications of photothermal catalytic VOC oxidation are expanding as high‑efficiency light sources combine with precise temperature‑control technologies. By decoupling photochemical and thermal effects at the microscopic scale and enhancing mass‑ and heat‑transfer efficiency at the macroscopic scale, photothermal technology provides robust engineered equipment support for achieving CO₂ reduction and efficient VOC remediation.
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