In industrial facilities including refineries, power plants and chemical plants, thermal insulation is vital for energy conservation, carbon reduction and stable process temperature control. As the carbon neutrality strategy advances, conventional insulation materials such as rock wool and aluminum silicate can hardly meet stringent operating requirements, including limited installation space, high humidity and long-term maintenance. As a new-generation super thermal insulator, silica aerogel is reshaping industrial thermal insulation solutions.

Aerogel is manufactured by removing liquid solvents from silica-based gel followed by drying. It features a nano-scale three-dimensional porous structure with over 95% air inside, ranking among the lightest known solid materials. Flexible aerogel blankets are the most widely adopted form in engineering. They deliver far lower thermal conductivity than traditional insulators. To achieve identical thermal resistance, aerogel only requires 1/4 to 1/5 of the thickness of rock wool, making it ideal for pipe racks, marine pipelines and narrow equipment interlayers with space constraints.

The material performs stably across an extensive temperature range from -200℃ to 650℃. Classified as non-combustible Grade A, aerogel will not melt, drip or release toxic fumes during fire accidents. Unlike water-absorbing traditional insulation, aerogel is inherently hydrophobic. It blocks moisture penetration and effectively mitigates Corrosion Under Insulation (CUI), a common industrial challenge. For outdoor pipelines and steam piping with frequent condensation, aerogel maintains stable performance without degradation caused by water absorption.

Aerogel shows outstanding advantages in service life and full-life-cycle costs. Under standard operating conditions, its design lifespan reaches 15–25 years, far exceeding rock wool (5–8 years for outdoor service). It greatly cuts costs arising from equipment shutdowns, frequent replacement and repeated maintenance. During installation, flexible aerogel blankets can be tailored to wrap pipes, valves and irregular components. Without free irritating mineral fibers, aerogel provides safer construction conditions.

Admittedly, the upfront purchasing cost of aerogel remains relatively high, which restricts selection for certain projects. Nevertheless, full-life-cycle evaluation reveals obvious economic benefits. Its slim thickness reduces consumption of outer protective layers; lightweight properties lower transportation loads; extended service life minimizes solid waste generation. Moreover, superior heat retention continuously cuts thermal loss and accelerates returns on energy-saving investment.

Currently, aerogel has been widely deployed in petrochemical refining, power generation, offshore platforms, LNG cryogenic storage, aerospace and other sectors. Driven by carbon neutrality goals, industrial demand for energy-efficient and low-carbon materials keeps growing. With merits of ultra-thin structure, long durability, hydrophobicity, safety and environmental compatibility, aerogel is becoming the preferred thermal insulation solution for high-end industrial projects. Ongoing technological upgrades and mass production will gradually reduce aerogel costs. It will gain wider popularity in industrial energy-saving retrofits and support sustainable green development for the whole industry.