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Volume 4, Issue 1, 2025
Open Access
Research article
Hydrogen-Enriched Compressed Natural Gas Transition for Low-Emission Operation in Stationary Genset Engines
debjyoti bandyopadhyay ,
prasanna s. sutar ,
shailesh b. sonawane ,
sandeep rairikar ,
s. s. thipse ,
shubham tule ,
yogesh aghav ,
krishna lakshminarasimhan ,
sauhard singh ,
sumit kumar mishra ,
tapan bera ,
rajesh badhe
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Available online: 01-30-2025

Abstract

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The degradation of ambient air quality in urban regions of India has been exacerbated by the expansion of automobile fleets and stationary engines. In response, the Central Pollution Control Board (CPCB), under directives from the Ministry of Environment, Forest, and Climate Change (MoEF&CC) and the National Green Tribunal (NGT), has implemented stricter emission norms, including CPCB IV+ standards for power generators. Concurrently, the escalating costs of diesel gensets, driven by the integration of advanced air-fuel systems and emissions control technologies, have necessitated the exploration of alternative fuels. Hydrogen-enriched compressed natural gas (HCNG), a blend of hydrogen and natural gas, has emerged as a promising solution for achieving low emissions while maintaining power performance. This study evaluates the application of an 18% HCNG blend in a genset engine initially compliant with CPCB II standards, achieving compliance with CPCB IV+ emission norms without requiring hardware modifications. Key calibration parameters, including injection timing, ignition timing, injection duration, and desired lambda, were optimized to ensure enhanced performance and emissions control. The in-cylinder combustion characteristics, including combustion pressure, temperature, rate of heat release (RoHR), and brake mean effective pressure (BMEP), were thoroughly analysed for both Piped Natural Gas (PNG) and the HCNG blend. The results indicate that the HCNG blend significantly reduces emissions, with reductions of 66% in carbon monoxide (CO) and 74% in methane (CH₄) compared to PNG. These findings underscore the potential of HCNG to serve as a transitional fuel, bridging the gap towards the adoption of pure hydrogen technologies. This study demonstrates that HCNG can achieve substantial reductions in regulated emissions while supporting cleaner and more sustainable energy systems, positioning it as a viable alternative for stationary power generation applications.

Open Access
Research article
Stakeholder Dynamics in the Distribution of Subsidized Fuel for Fishermen in Bandar Lampung City, Indonesia: Challenges and Strategic Implications
rostuti lusiwati sitanggang ,
indra gumay febryano ,
abdullah aman damai ,
hari kaskoyo ,
maya riantini
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Available online: 02-17-2025

Abstract

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The effective implementation of subsidized fuel distribution for fishermen necessitates the coordinated involvement of multiple stakeholders to ensure equitable and efficient allocation. This study examines the roles, influences, and interactions of stakeholders in the distribution process, with the aim of formulating an optimal distribution strategy. A case study approach is employed, integrating qualitative research methods such as in-depth interviews, participatory observation, focus group discussions, and document analysis. Stakeholder Mapping and a Strengths, Weaknesses, Opportunities, and Threats (SWOT) analysis are utilized to assess stakeholder influence and interests. The findings indicate unanimous support for the subsidized fuel distribution policy in Kangkung Village, with no opposition identified among stakeholders. The Downstream Oil and Gas Regulatory Agency emerges as the most influential entity, while fishermen and the Mina Jaya Village Unit Cooperative exhibit the weakest capacity in policy implementation. Based on influence-interest analysis, key stakeholders include the Downstream Oil and Gas Regulatory Agency, Pertamina Patra Niaga (PPN), fuel distribution companies, and fishermen. Given these dynamics, an aggressive strategy is recommended for the Marine and Fisheries Service Office of Bandar Lampung City to enhance accessibility and ensure the efficient allocation of subsidized fuel. Strengthened collaboration between the Bandar Lampung City Government and fuel stations is identified as a critical measure to facilitate streamlined access to subsidized fuel for local fishermen.
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