The results, which will be published in the March edition of the journal Fuel, stemmed from a series of experiments using a new facility at
"The results of the study show that the apparent gasification rate parameters for relatively large particles of practical relevance are comparable to those obtained from laboratory studies with much smaller particles," said
Synthetic fuels currently are being blended with petroleum fuels for performance improvement in automobile and aircraft applications and also are used in equipment trials in commercial aircraft. New techniques, however, are needed to reduce the cost and improve the efficiency of making the fuels.
The char was prepared by inert heating of a large quantity of low-ash pinewood sawdust in an electrical furnace to a temperature of 1,100 degrees Kelvin. The low-ash pinewood char was selected to minimize the catalytic effects of ash on mass-loss rates.
The researchers said char gasification for CO2 recycling was used because it has been studied less than char gasification in other environments and has the potential to reduce greenhouse gas emissions by recycling CO2 from stationary power plant exhaust streams.
They relied on independent measurements from gravimetric analyses and product gas composition analyses to determine char mass-loss rates and conducted detailed uncertainty analyses of both methods and reported uncertainties in kinetic rate parameters. They also investigated the char structure development with reaction progress and its implication on mass-loss rates.
Joining Sircar as authors of the paper are
"This study, specifically on the widely available pinewood, moves us a step closer toward mass producing this as a synthetic fuel for uses by the U.S. air transportation system, thereby reducing our reliance on petroleum oil," Gore said.
In addition, they hope to determine how to generate less carbon dioxide than conventional synthetic-fuel processing methods while increasing the yield of liquid fuel by adding hydrogen into the coal-and-biomass-processing reactor, a technique pioneered by
Findings published in 2009 showed that carbon dioxide might be reduced by 40 percent using the technique.
The research is part of a larger effort to develop a system for generating large quantities of synthetic fuel from agricultural wastes, other biomass or coal that would be turned into a gas and then converted into a liquid fuel.
The work is funded by the
The Purdue Energy Center, part of the university's
Experimental and Modeling Study of Pinewood Char Gasification with CO2
The objective of this study is to measure apparent rate parameters for pinewood char gasification with CO2 using large particles with relevance to practical gasifiers. The novel features of this work include: (1) char gasification for CO2 recycling, which is studied less in the past than char gasification in other environments, (2) independent measurements involving gravimetric analyses and product gas composition gas chromatography, (3) detailed uncertainty analyses of both methods to report resulting uncertainties in kinetic rate constants, and (4) investigation of the char structure development and its role in gasification. A fixed-bed reactor providing a slip-velocity of 0.12 m/s gasifier and control of the bed temperature to within a10 K at 1000-1170 K is used. A low-ash (BET surface area show significant increase with char conversion. The results of this study show that the apparent gasification rate parameters for relatively large particles of practical relevance are comparable to those obtained from laboratory studies with much smaller particles.
TNS 30TagarumaMar-131219-4583606 30TagarumaMar
Most Popular Stories
- Obama Administration Releases Proposal to Regulate For-Profit Colleges
- Koch Brothers Step up Anti-Obamacare Campaign
- Elizabeth Vargas' Husband Marc Cohn Addresses Rumors
- Keurig Adds Peet's coffee, Alters Starbucks deal
- U.S. to Relinquish Gov't Control Over Internet
- Quiznos Files for Chapter 11
- SoCalGas Reaches Record Spend on Diversity Suppliers
- FDIC Sues Big Banks Over Rate Manipulation
- U.S. Consumer Sentiment Falls in Early March
- Vybz Kartel Convicted of Murder