choose is a critical and multifaceted challenge that requires careful consideration. Addressing India’s refining capacity There is an American company with an international footprint that designs, builds, supports, and guarantees its solutions and technologies, thereby providing the benefits of a ‘one company’ approach for refiners worldwide. The company is backed by decades of practice and proficiency in catalysts, chemicals, adsorbents, and engineered solutions for sulphur removal using aqueous solutions such as caustic and amine. It also provides a range of spent caustic treatment technologies for those refineries whose existing wastewater treatment facilities are already operating at or near maximum capacity and could benefit from spent caustic pretreatment before it is released to wastewater treatment. Many systems use mass transfer devices as part of an overall solution to provide treatment of impurities to meet client specifications. Many solutions rely on dispersion methodologies, especially for liquid-liquid treatment, that create larger ‘bubbles’ of liquids, promoting carryover and reducing reaction space surface area. A preferred method is to use a non-dispersive mass transfer device, which achieves a larger interfacial surface area for reaction and reduces mixing energy and thus potential carryover (see Figure 1 ). The device of this type used most effectively to remove mercaptans (RSH), and H₂S consists of a multitude of fibres packed into a cylindrical column, where the aqueous phase (for example, caustic, amine, or water solution) adheres to the surface of the fibres, forming a thin film as it flows downward. The hydrocarbon stream containing the impurities flows concurrently through the column, where it makes close contact with the wetted fibres, creating a large interfacial surface area without causing dispersion or emulsion formation, thereby enabling improved treatment of those impurities. This non-dispersive mass transfer device offers numerous advantages over traditional methods, including high mass transfer efficiency, elimination of carryover and emulsions, smaller equipment size, lower operating costs, flexibility in operation, and simplified operation with
Regulatory oversight and penalties (PNGRB)
Violation
Maximum penalty, INR
Contravention of PNGRB directions
250 million 1 million/day
Continuing contravention Wilful failure to comply Subsequent offences Continuing default
10 million 20 million
2 million/day
Table 1
and subsequent offences are punishable with a fine of up to INR 20 million. A continuing contravention is punishable with an additional fine of up to INR 2 million for every day the default continues (see Table 1 ). These actions and penalties compel compliance. Indian refineries are upgrading their facilities with cutting-edge technologies and solutions and embarking on collaborative efforts to handle higher-sulphur crude oils, thereby producing and delivering cleaner fuels. Foundational solution for separation and refining It is remarkable to discover chemical processes that bypass the need for raw material purification and product separation. Most reactions require some degree of refinement and separation for efficiency and purity. In the oil and gas industry, hydrogen sulphide (H₂S) and mercaptans found in crudes must be removed from intermediate or final products for performance, economic, environmental, and health reasons. Commonly, mass transfer is the foundational solution in identifying and optimising processes for separation and refining. The application of mass transfer principles in the petroleum industry dates back to the early 20th century, when the first distillation columns were used to separate crude oil into various fractions. Over the years, the oil and gas industry has evolved to incorporate more advanced mass transfer technologies, such as adsorption, stripping, and extraction. Today, mass transfer remains a critical component of petroleum refining operations. The adoption of advanced mass transfer technologies is vital for the continued growth and efficiency of the Indian refining sector. Deciding which mass transfer technology to
Refining India
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