For professionals in the petrochemical and refining industries, a thorough understanding of hydrotreating catalyst properties is fundamental to optimizing operational efficiency and ensuring the production of high-quality fuels. This guide explores the key physical-chemical properties and activity indexes that define the performance of these crucial catalysts. By understanding these parameters, refiners can make informed decisions regarding catalyst selection, process optimization, and overall plant productivity. NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing detailed technical information on our advanced hydrotreating catalyst formulations.

The physical-chemical characteristics of a hydrotreating catalyst dictate its behavior and effectiveness within the reactor. Among the most important properties are its appearance, particle size, pore volume, surface area, and bulk density. Our hydrotreating catalysts typically present as trilope extrudates, a shape that optimizes gas-liquid-solid contact within the reactor, facilitating efficient mass transfer. The specific surface area, often measured in m²/g, is a critical indicator of the catalyst's capacity to host active sites, with higher surface areas generally correlating to greater activity. Pore volume, measured in mL/g, influences the diffusion of reactants and products within the catalyst structure.

Equally important are the chemical compositions and mechanical strengths. The active components, such as tungsten trioxide (WO3), molybdenum trioxide (MoO3), and nickel oxide (NiO), are precisely controlled within specified weight percentages (wt%) to achieve the desired catalytic activity for specific reactions like hydrodesulfurization (HDS) and hydrodenitrogenation (HDN). The crushing strength, typically measured in N/cm, is a measure of the catalyst's resistance to mechanical breakdown. High crushing strength is essential to prevent attrition and ensure the catalyst bed maintains its structural integrity throughout the operational cycle, even under demanding process conditions.

The activity index provides a quantitative measure of the catalyst's performance under specific process parameters. Key parameters influencing activity include hydrogen partial pressure, temperature, space velocity (hr⁻¹), and hydrogen-to-oil ratio (V/V). For instance, a target value for HDS activity might be expressed as a specific percentage of sulfur removal achieved under a defined set of conditions. By understanding these activity indexes, refiners can predict catalyst performance and optimize operating conditions to achieve desired product specifications. This detailed understanding is vital for processes aiming to produce low-aromatics diesel or purify gas oil.

Reference operating conditions provide valuable insights into how the catalyst performs with different feedstocks, such as Daqing coked diesel or FCC diesel. These conditions outline the recommended temperature ranges, hydrogen partial pressures, and space velocities that yield optimal results. For example, achieving a high dealkaline nitrogen rate min 90% is a key performance indicator for many hydrotreating applications.

At NINGBO INNO PHARMCHEM CO.,LTD., we ensure our hydrotreating catalysts are manufactured to exacting standards, providing refiners with the reliable performance and efficiency needed to produce high-quality fuels. By carefully controlling these physical-chemical properties and understanding their impact on activity, we empower our clients to achieve their production goals and maintain a competitive edge in the market.