Non-Thermal Plasma Gasification of Residual Tars and Oils From Biomass Gasification

Advanced Fossil Energy Utilization
2011 AIChE Spring Meeting
AIChE Spring Meeting and Global Congress on Process Safety
March 14, 2011 - 8:00pm

Non-Thermal Plasma Reforming of Refractory Tars and Oils Generated by Biomass Gasification

L. Frost1, S. Elangovan1, and J. Hartvigsen1

1Ceramatec Inc, Salt Lake City, Utah

Many Western states have large supplies of non-food based biomass that can potentially be used as carbon neutral energy sources. Biomass such as corn stover or wheat straw is readily available in many locations and if processed in an environmentally benign way could supplement traditional energy sources for power generation. The synthesis gas generated from the biomass can also be used as feedstock for production of liquid fuels through the Fischer Tropsch process or as input to a chemicals facility. Using biomass in conjunction with coal can also mitigate the concerns with the carbon dioxide generated by the coal gasification process.

One of the barriers to commercial implementation of biomass gasification is the refractory tars and oils created in the gasification process. These products are generated as part of the gasification process and are extremely difficult to destroy. Current biomass gasification systems typically condense these tars and oils and dispose of them at hazardous waste sites. Typical downstream operations such as a combustion turbine, a reciprocating engine generator set, or a fuel cell system all require a gasifier product stream free of these tars and oils for successful operation. These tars and oils represent lost mass and energy if simply removed from the gasifier product stream and as previously mentioned are considered to be hazardous waste. Removal and disposal of this hazardous material stream creates monetary and regulatory penalties to the gasifier operator.

Ceramatec, as a co-recipient of a DOE funded research project, is applying its GlidArc ® non-thermal plasma reformer technology to convert refractory tars and oils to synthesis gas. This operation will occur while the tars and oils are still entrained in the gasifier product stream. Preliminary laboratory work indicates that it is possible for the plasma reformer to reform the stream exiting the gasifier and convert the entrained tars and oils to additional hydrogen and carbon monoxide. This process will be tested with a ten (10) ton per day biomass gasification unit using an Emery Energy gasifier that will be located at Western Research Institute in Laramie, Wyoming. Funding for the effort will be provided by a US Department of Energy award to Emery Energy.

This paper will present the overall description of the gasification process and the non-thermal plasma reformer in particular. Operational characteristics and laboratory results related to the reforming of the refractory tars and oils will be presented. The larger pilot sized facility at Laramie will also be described. Data may be available from the larger pilot sized facility in Laramie by the time for the conference and if available will be presented.

Professional Development Hours
0.5 PDHs
You will be able to download and print a certificate for these PDH credits once the content has been viewed. If you have already viewed this content, please click here to login.

Would you like to access this content?

No problem. You just have to complete the following steps.

You have completed 0 of 2 steps.

  1. Log in

    You must be logged in to view this content. Log in now.

  2. Purchase Technical Presentation

    You must purchase this technical presentation using one of the options below.
    If you already purchased this content recently, please click here to refresh the system's record of ownerships.


Credits 0.5 Use credits
List Price $25.00 Buy now
AIChE Members $15.00 Buy now
AIChE Undergraduate Student Members Free Free access
AIChE Graduate Student Members Free Free access
Related Topics: