Engineered chemical compounds and nitrate salts customized for high-temperature heat transfer and thermal storage systems.
As the global energy transition accelerates, matching intermittent renewable energy generation with continuous, load-following power demand has become the defining challenge of modern energy grids. Traditional battery technologies like lithium-ion excel in short-duration electrical storage (typically 2 to 4 hours) but face steep cost curves and environmental concerns when scaled to long-duration thermal or electrical storage.
This is where High-Temperature Molten Salt Thermal Energy Storage (TES) emerges as the leading commercial-grade utility solution. By storing energy as heat rather than chemical energy, molten salt storage systems achieve exceptional thermodynamic efficiency, operating life cycles of over 30 years without capacity degradation, and significantly lower cost parameters on a megawatt-hour thermal ($/MWhth) basis.
In addition to utility-scale CSP plants, modern commercial installations increasingly utilize molten salt TES for industrial steam generation, grid-scale peak-shaving, and nuclear power plant optimization. As heavy industries seek pathways to decarbonize high-temperature process heat, the demand for high-purity nitrate compounds has reached unprecedented levels.
Across Europe, North America, the Middle East, and Asia-Pacific, molten salt systems are stabilizing local grids. The commercial case relies on the material's massive sensible heat storage capacity. Modern binary systems achieve volumetric heat capacities of approximately 2.8 MJ/m³·K at high operating temperatures, translating to high energy densities for large-scale heat reservoirs. As chemical and mining technology advances, manufacturers like Shanxi Vojin New Materials Co., Ltd. have engineered specialized purities to mitigate the major challenges of system operators: corrosion of heat exchangers and premature chemical decomposition of the nitrate salts.
The thermodynamic behavior of molten salts depends directly on their chemical purity. The presence of trace impurities—particularly chlorides, carbonates, and sulfates—greatly accelerates the corrosive degradation of storage tanks, piping systems, and heat exchanger bundles constructed from stainless steels or nickel-based alloys (e.g., Inconel).
Our technical roadmap highlights key purification milestones and material engineering strategies designed to extend system lifespans beyond the 30-year design life:
Reducing chlorine levels prevents localized pitting corrosion and stress-corrosion cracking in steel and alloy heat transfer loops.
Formulating customized eutectics including calcium nitrate [Ca(NO3)2] to depress melting points below 150°C and minimize parasitic heating costs.
Proprietary additives and controlled cover gas designs to suppress nitrate-to-nitrite decomposition at operating ranges near 600°C.
Molten salt heat storage is not a one-size-fits-all technology. Localized environmental conditions dictate the design and chemistry of the system:
A Global Pioneer in Molten Salt Thermal Media & Industrial Nitrates.
Driven since 2000, we have been committed to the entrepreneurial spirit and passion for innovation. Our team takes pride in delivering dependable products and services with a quality distinction in thermal energy storage & water-soluble fertilizer industries globally.
Established formally in our modern industrial format in 2010, the company boasts a manufacturing footprint of approximately 1,000 acres, backed by deep raw material integration in Shanxi, China's center for inorganic salts. Our state-of-the-art refinery maintains an annual capacity of 600,000 tons of high-grade nitrate formulations. This scale ensures that global energy developers receive reliable, consistent deliveries matching international purity and safety protocols.
Providing high-capacity thermal storage and material solutions across critical industrial sectors.
High-efficiency heat retention for utility-scale CSP, off-grid steam generation, and industrial clean heating loops.
Ultra-pure chemical raw materials optimized for industrial glass-strengthening baths and optical-grade display processing.
Supplanting coal-fired systems through high-temperature thermal battery conversions, reducing industrial carbon footprints.
Precision agricultural-grade nitrates and customized water-soluble fertilizers for optimized global crop nutrition.
Explore our main industrial product divisions providing raw materials for thermal storage and agriculture.
Global energy construction demands extreme supply chain discipline. Delays in chemical delivery can stall construction phases, resulting in severe financial penalties for project engineering firms (EPCs). Operating from Shanxi, the premier chemical and mineral hub of China, Shanxi Vojin New Materials Co., Ltd. leverages a structural geographic and manufacturing advantage to provide reliable supplies globally:
Transporting thousands of tons of high-grade nitrates across continents requires compliance with strict safety codes. As a leading exporter, Vojin holds complete certifications including ISO 9001, REACH registrations for EU imports, and adheres to UN Class 5.1 Oxidizing Substances transport regulations.
We coordinate with global shipping companies to utilize heavy-duty, moisture-barrier bulk bags, preventing moisture absorption during sea transport. This ensures our materials arrive dry, free-flowing, and ready for immediate furnace charging.
Why engineering partners and global utilities select Vojin for their thermal storage systems.
Integrated experience on exporting operation. Always assure your customers good quality and smooth custom clearances.
Annual output of 600,000 Tons of molten salts and related chemical products to meet utility-scale infrastructure requirements.
Experienced technology skill & service team providing quick response, chemical optimization, and on-site loading support.
Multiple items for selection such as KNO3, NaNO3, Ca(NO3)2 and specialized blends to meet various chemical requirements.
Stay updated with the latest technological and chemical progress in the energy storage industry.
The technology can operate at higher temperatures, which has a positive impact on the efficiency of utility-scale plants...
Read Article
A concentrated solar power plant converts solar energy to electricity. It is based on advanced salt formulations...
Read Article
Molten salt energy storage has emerged as a promising solution for enhancing the efficiency of the modern green power grid...
Read ArticleTechnical guidance from our research laboratory on the properties, usage, and logistics of thermal storage salts.
Building long-term partnerships with leading engineering firms and global chemical distributors.
High-purity salts, water-soluble crop nutrition formulations, and targeted medical-grade inputs.
VOJIN