Category: Multi-Slide Guides

The Digest’s 2025 Multi-Slide Guide to Simulation of Jet Engine Performance using SAF Blends

October 21, 2025 | Jim Lane

This research uses exascale computing (PeleLMeX solver) to perform high-fidelity simulations of combustor performance using Sustainable Aviation Fuel (SAF) blends up to 100%. A validated, reduced two-component surrogate chemical kinetic model for HEFA-SPK (74 species) was developed. This simulation capability accelerates and de-risks the expensive, risky certification of newer SAFs beyond the current 50% blend […]

The Digest’s 2025 Multi-Slide Guide to Fuel effects on aviation engine emissions – a modeling tool for SAF screening

October 20, 2025 | Jim Lane

This project delivers a low-computational-cost 0-D/1-D reactor network tool to rapidly screen Sustainable Aviation Fuels (SAF). The tool, validated against CFM56 engine data, incorporates reduced chemical kinetic mechanisms for fuel effects on emissions (NOx, CO, PM, PN). This technology enables fuel producers and OEMs to accelerate aviation decarbonization by de-risking new SAF candidates. The model […]

The Digest’s 2025 Multi-Slide Guide to A low GHG advanced SI engine that can operate on NG and NG/H2 blends with diesel-equivalent performance for off-road applications

October 19, 2025 | Jim Lane

This project develops an advanced Spark Ignition engine operating on Natural Gas (NG) and NG/Hydrogen blends, targeting 45% BTE (diesel-equivalent). Technical advances include coupled 1D/CFD simulations and a novel in-situ CO2/H2O exhaust gas sensor for fast EGR feedback and H2 ratio estimation. The goal is Stoichiometric operation with near-zero CH4 slip. This results in up […]

The Digest’s 2025 Multi-Slide Guide to Plasma-Assisted Pre-Chamber Ignition System for Highly Dilute Stoichiometric Heavy-Duty Natural Gas Engines

October 16, 2025 | Jim Lane

This research develops a next-generation plasma-assisted pre-chamber ignition system for highly dilute stoichiometric heavy-duty natural gas engines. Key technology includes nano-second pulsed plasma igniters and CFD modeling to optimize prechamber geometry and increase dilution tolerance. The innovation aims to achieve ≥48% Brake Thermal Efficiency, improving efficiency by ≥7% compared to baseline natural gas engines. This […]

The Digest’s 2025 Multi-Slide Guide to Medium Duty Off-Road DME Engine Achieving High Efficiency and Ultra Low Emissions

October 15, 2025 | Jim Lane

This project develops durable fuel injection systems (FIS) and Ducted Fuel Injection (DFI) for rDME Mixing Controlled Compression Ignition (MCCI) combustion in off-road engines. A core technology advance is utilizing dual FIS development pathways to mitigate risk for a planned 200-hour durability demonstration. The technology leverages rDME’s low carbon intensity (as low as -279 gCO2e/MJ), […]

The Digest’s 2025 Multi-Slide Guide to High-Efficiency Mixing Controlled Compression Ignition Combustion of Propane Dimethyl Ether (DME) Blends

October 14, 2025 | Jim Lane

This project develops Mixing Controlled Compression Ignition (MCCI) for propane/DME blends. Technology advances include a high-pressure fuel system capable of over 1100 bar injection and CFD optimization utilizing exhaust rebreathing to stabilize combustion. The impact is achieving diesel-equivalent efficiency (≥37.1%) and enabling a potential 15% reduction in CO2 emissions compared to conventional propane engines, leveraging […]

The Digest’s 2025 Multi-Slide Guide to Ammonia for 4-stroke Marine Dual Fuel and Gas Engines (Retrofits and New)

October 13, 2025 | Jim Lane

This R&D integrates engine experiments and catalytic decomposition to maximize ammonia utilization in 4-stroke marine engines. Technical advances include fully commissioned safety systems and demonstrating over 95% diesel replacement using dual-fuel strategies. The impact is accelerating maritime decarbonization, achieving an 85% reduction in CO2-equivalent emissions by addressing challenging fuel properties and N2O formation.

The Digest’s 2025 Multi-Slide Guide to Biodiesel Poisoning of Close-Coupled SCR

October 12, 2025 | Jim Lane

This research addresses how CC-SCR systems are vulnerable to metal poisoning (Na, K, Ca, Mg) from high-level biodiesel blends. The core technology is utilizing Spaci-MS (Spatial activity/storage mapping) alongside systematic B100-fueled engine aging to link distributed catalyst degradation to specific metal gradients. Key progress includes acquiring the 125 kW genset, establishing fuel infrastructure plans, and […]

The Digest’s 2025 Multi-Slide Guide to Low-Load Cycle Emission Control

October 9, 2025 | Jim Lane

Focused on enhancing low-temperature SCR activity for hard-to-electrify applications, this project leverages Operando EPR and DFT calculations to study Cu-zeolite kinetics. A key finding is that strong Brönsted acid sites (BAS) enhance low-temperature activity by promoting the hydrolysis and transfer of Cu(II) complexes. The team validated that NH3 overdosing inhibits NOx conversion by hindering the […]

The Digest’s 2025 Multi-Slide Guide to Challenges with Renewable Fuels

October 8, 2025 | Jim Lane

This project uses atomic-level insights (HAADF-STEM) to understand catalyst durability against biodiesel poisoning and H2-ICE exhaust. Technologically, highly stable Pd-core Pt/Pd-shell structures were identified in commercial catalysts for oxidation. Key findings show high H2O content increases low-temperature SCR N2O formation, while H2 slip reduces redox-active Cu(II) sites above $200C. H2-SCR concepts are advancing to significantly […]

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