Category: Multi-Slide Guides

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 […]

The Digest’s 2025 Multi-Slide Guide to Low Greenhouse Gas NOx Control

October 7, 2025 | Jim Lane

This research fundamentally clarifies N2O formation mechanisms during low-temperature SCR using Cu-zeolite catalysts and advanced characterization (DRIFTS/EPR). Key findings indicate that N2O formation is driven by the gaseous NO2 pool and that Brönsted acid sites (BAS) catalyze NH4NO3 decomposition. This work supports advanced technological solutions, demonstrating that a multi-component catalyst bed arrangement (Fe-CHA and composite […]

The Digest’s 2025 Multi-Slide Guide to Optimized Low Carbon Fuel Range Extenders (HiREX)

October 6, 2025 | Jim Lane

This project focuses on demonstrating a nonroad series hybrid powertrain to achieve more than 50% LCA GHG reduction. Technological foundations include optimized hybrid engines, high-temperature Motor/Generators/Inverters, and predictive control. Key findings include developing the series hybrid model and defining the Range Extender Electric Vehicle (REEV) architecture. A roadmap is progressing to evaluate future low-carbon powertrains, […]

The Digest’s 2025 Multi-Slide Guide to Predictive Modeling for 100% SAF Adoption

October 5, 2025 | Jim Lane

This project utilizes a predictive simulation framework employing LES/DNS and successfully ported models to NekRS (GPU-based) for a 10x speedup. Partners include ANL (PI), UIUC, Convergent Science Inc, and multiple National Labs. Accomplishments include validating ARC-M1 flow LES and showing that small fuel property changes significantly impact flame shape and Lean Blow Out (LBO) equivalence […]

The Digest’s 2025 Multi-Slide Guide to High T and P Characterization of SAF

October 2, 2025 | Jim Lane

This project advances SAF qualification by using unique instruments to measure fuel properties (surface tension, density, bulk modulus) at actual turbine engine temperatures and pressures. Partners include NREL, Georgia Tech/GE Aerospace, ANL, and Washington State University. Milestones completed include measuring critical fuel properties for simulations. Future work involves finalizing 2D GC methods and pressurized DSC.

The Digest’s 2025 Multi-Slide Guide to High Pressure DI for Propane-DME Light-Duty Engines

October 1, 2025 | Jim Lane

Technological advances include a 1500-bar High Pressure Fuel Pump (HPFP) with 50% efficiency gain and high-flow injectors reducing hydraulic delay by over 50%. Partners are WM International Engineering (PI), IIT, ANL, and Diversified CPC International. All BP2 milestones were met, including successful 200-hour durability testing, system integration onto a Hyundai engine, and attaining the interim […]

The Digest’s 2025 Multi-Slide Guide to High Efficiency HD Natural Gas Engine Development

September 30, 2025 | Jim Lane

This project focuses on developing a high-efficiency natural gas engine using CFD to optimize intake ports, high compression ratio pistons, and Variable Valve Timing (VVT). Cummins is the sole participant. Key achievements include demonstrating 41% Brake Thermal Efficiency (BTE) and turbine inlet temperature below the 850°C target. All Budget Period 2 milestones, including engine design […]

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