LPG And LNG Differences And India Energy Security Challenges

The disruption of maritime energy routes due to the West Asia conflict has exposed critical differences between LPG and LNG, highlighting India’s varying vulnerabilities and policy responses in managing these fuels.

Energy disruption through Strait of Hormuz

• Strategic chokepoint impact: The effective halt of vessel movement through the Strait of Hormuz has severely disrupted India’s energy imports, especially LPG and LNG, due to their heavy dependence on this route.
• Differential vulnerability across fuels: While crude oil supplies have also been affected, India has relatively diversified sources for oil procurement. In contrast, LPG and LNG imports are far more dependent on West Asia, making them more vulnerable to disruptions.

Dependence Patterns And Supply disruptions

• LPG import dependence and exposure: India relies on imports for nearly 60% of its LPG consumption, and about 90% of these imports pass through the Strait of Hormuz. This implies that approximately 54% of India’s LPG supply has been disrupted.
• LNG dependence and relative resilience: India imports nearly half of its natural gas requirements as LNG, with 55–60% sourced from West Asia via the Strait. This has resulted in a disruption of roughly 30% of natural gas supplies, making the situation comparatively less severe than LPG.
• Prioritisation of household consumption: To manage shortages, the government has curtailed LPG supplies to commercial and industrial users, ensuring uninterrupted access for domestic households.

Chemical and physical characteristics of LPG and LNG

• Composition and origin differences: LPG is primarily a mixture of propane and butane, produced as a byproduct of crude oil refining and natural gas processing. LNG, on the other hand, consists mainly of methane derived from natural gas.
• Liquefaction conditions and volume reduction: LPG can be liquefied under moderate pressure or low temperatures, reducing its volume to about 1/260th of its gaseous form. LNG requires extreme cooling below -160°C, shrinking its volume to about 1/600th, making it suitable for long-distance transport.
• Functional differences in usage: LPG is widely used for cooking, heating, and limited industrial applications. LNG primarily functions as a transport medium for natural gas, which is later regasified and used across sectors such as power, fertilisers, and transportation.

Storage, transportation, and delivery systems

• LPG distribution and portability: LPG is stored in pressurised cylinders and transported mainly by road, making it accessible even in remote areas without pipeline infrastructure.
• LNG transportation and regasification: LNG is transported in specialised cryogenic ships and delivered to regasification terminals, where it is converted back to natural gas and distributed via pipelines.
• Infrastructure dependency differences: LPG does not require pipeline connectivity, whereas PNG (derived from LNG) depends entirely on pipeline infrastructure, limiting its reach primarily to urban areas.

Safety and convenience considerations

• Safety characteristics of fuels: Natural gas (PNG) is lighter than air and disperses quickly in case of leakage, making it safer. LPG is heavier than air and tends to accumulate, increasing the risk of fire and explosions.
• User convenience and supply continuity: PNG offers uninterrupted, metered supply through pipelines, eliminating the need for cylinder booking and replacement. LPG requires periodic cylinder replacement, involving manual handling.

Government response and policy measures

• Supply management and prioritisation: The government has ensured 100% supply for priority segments such as domestic PNG users and CNG vehicles, while limiting supplies to commercial users to around 80%.
• Boosting domestic LPG production: Refineries have been directed to maximise LPG output and divert feedstock from petrochemicals. This has increased domestic LPG production by 40%, raising its share in total demand from 40% to about 55%.
• Demand regulation measures: The government has increased the waiting period for LPG cylinder refills to curb hoarding and manage demand effectively.
• Promotion of alternative fuels: Commercial users have been encouraged to switch to alternatives such as kerosene, fuel oil, biomass, and coal to reduce pressure on LPG supplies.

Push for PNG expansion and structural transition

• Encouraging shift from LPG to PNG: Consumers are being urged to switch to PNG where available, as it reduces reliance on imported LPG.
• Incentives and infrastructure expansion: City Gas Distribution companies have introduced incentives such as free gas volumes and waived connection charges to promote PNG adoption.
• Regulatory and institutional support: The Petroleum and Natural Gas Regulatory Board (PNGRB) has directed companies to expand outreach and accelerate connection provision.
• Potential consumer base expansion: Approximately 60 lakh households located near existing PNG networks are identified as immediate candidates for transition.

Structural challenges in transition

• Limited PNG penetration: Despite policy push, PNG connections remain limited at around 1.5 crore households compared to 33.3 crore LPG connections.
• Urban-rural divide in energy access: PNG expansion is largely urban-centric due to pipeline requirements, whereas LPG remains the primary fuel for rural and remote regions.