Fuel Reformer, Engine, and Generator System


Upon receiving a partially completed synthesis rig system from Biomass Energy Company (BEC) in 2008, Prof. Depcik has overseen the completion of this experimental setup. The rig consists of a full scale reformer, Chevy 350 small block engine, Mecc Alte ECO32-2L/4 generator, and extensive data acquisition equipment. This unique rig utilizes waste glycerin (with added water) from biodiesel production in order to produce electricity through combustion of a hydrogen rich synthesis gas (syngas) in the engine/generator setup. The rig allows for three different combustion pathways: pure propane, reformed propane, and reformed glycerin. Pure propane is used in order to determine the needed fuel flow requirements in order to run the engine and generator system. Reformed propane is utilized in order to calibrate the model of the fuel reformer including ambient heat transfer. Reformed glycerin provides the final pathway as it is broken down into a hydrogen-rich syngas through partial oxidation and steam reforming in an oxygen deficient environment over a nickel/alumina catalyst (of note, this process is highly exothermic and self-sustaining). Data acquisition is completed using a custom LabVIEW program written in-house by graduate students that records flow rates, engine performance, temperatures, and pressures along with in-cylinder pressure and crank angle measurements. Future upgrades to the rig will include increasing the size of the reformer to allow for better syngas production, upgrading the generator for additional loading capabilities, and investigation into heat recovery for biodiesel production (e.g., used in the glycerin demethylation process). Moreover, the setup can be relatively easily modified in order to utilize different gaseous fuels (e.g., natural gas or biogas) directly for power, reforming, or catalytic upgrading studies.


Research Scientist Derek Pickett is featured as part of an article about the next generation of biodiesel co-product research in Biodiesel Magazine.

Representative paper: Use of Glycerin By-product from Biodiesel Production for Power Generation

Outside of Mechanical research room at the Hill Engineering Research
Mechanical research room at the Hill Engineering Research and Development Center that contains the fuel reformer, engine, and generator
Reformer System with arrows to flow controllers, reformer, and heat exchanger
Flow controllers and reformer that can convert propane, glycerin, or other biomass liquids to a high hydrogen content synthesis gas stream
Engine and Generator with arrows to generator and chevy engine
Chevy 350 engine and Mecc Alte generator that provides a load on the engine for power studies

 

Syngas Flow System: Chart that shows the pathways that a compressed air tank, glycerine tank, and propane tank take to get to the reformer. The propane tank has an extra path that flows to the Chevy 350 V8, which is connected to the Mecc Alte ECO32-2L/4 Generator.
Schematic of the different flow pathways that can be employed in the system
Parts of the Fuel Reformer and their Information
EngineChevy 350 V8 small block naturally aspirated spark ignition engine, four valve, 4 inch bore, 3.48 inch stroke, compression ratio 8.2:1.
ReformerCustom reformer with propane line, compressed air line, glycerin injection nozzle and 9000V spark plug igniter. Filled with Ni/Al2O3 catalyst.
Generator
Mecc Alte ECO32-2L/4 alternator equipped with two 50 amp 240 volt power outlets (can be re-wired for 50 kW). Generator capabilities with two electric heaters drawing 3.6 and 6.5 kW, respectively.
In-Cylinder Pressure AnalysisKistler 6052C piezoelectric transducer calibrated to measure from 0 to 50 bar with less than 0.5% error at up to 160 kHz, sensitivity to thermal shock less than 0.5 bar, Kistler 5011B charge amplifier with low pass filter, Kistler 2614B optical encoder and Kistler 2614B4 pulse multiplier provides 0.1 to 6 degree resolution. Devices coupled to an NI SCB-68 shielded input/output connector block.
Heat Exchanger
SEC PL-500 stainless steel shell in tube heat exchanger with 146 kW capacity at 55 liters/min.
General MeasurementsEquipped with sensors to monitor reformer air flow, propane flow, glycerin flow, reformer pressure, reformer temperature, generator output, relative humidity, ambient air temperature and pressure, engine intake pressure and temperature and engine intake airflow via Merriam LFE.
Data AcquisitionNational Instruments (NI) compact-reconfigurable Input/Output (cRIO) device (model cRIO-9073) operating in conjuncture with a LabVIEW program coded in-house.