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 Feedstock TagsCanola
Fischer Tropsch
GHGenius 3.19
GHGenius 4.02
Wheat Straw
 Advanced Biofuel Update
 Prepared October 2012
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The US National Renewable Energy Laboratory has published a number of techno-economic assessments over the past several years on advanced biofuel pathways. These studies include:
Ethanol via biochemical processes using agricultural residues.
Ethanol via thermochemical process using woody biomass.
Gasoline via thermochemical process using woody biomass.
FT Distillate via thermochemical process using woody biomass.
Gasoline and Diesel fuel via pyrolysis.

Additional information has been found for the wood to DME process and this information is used to update this pathway in GHGenius. All of these pathways are already in GHGenius, having been added over the years. This work updates the default values in the GHGenius model and uses the updated data to model and report on the energy balances and GHG emissions of the pathways. This includes undertaking sensitivity analysis on the important variables.

In GHGenius there are multiple sub-pathways for some of these fuel systems, for example there are four agricultural feedstocks and a wood feedstock for the biochemical route and the pyrolysis pathway has woody biomass feedstock and agricultural residues. We have developed consistent inputs for all of these sub-pathways based on the NREL data, whereas they only provide data for one feedstock.

There are process developers that have hybrid systems, those that use both biochemical and thermochemical process to convert biomass to transportation fuels. These can also be modelled in GHGenius by adapting one of the existing pathways. Two examples of this are presented, but the inputs required for these systems are not included as default values in the model.

The results are presented for Canada for the year 2012 using the IPCC 2007 GWPs, unless otherwise stated. The version of GHGenius that accompanies this report is version 4.02. This version also has some updates to the electric and fuel cell vehicle pathways, which are described in a separate report. The GHGenius manuals have also been updated with the information used in this report.

Tags: DME - Ethanol - Feedstock - Fischer Tropsch - GHGenius 4.02 - PyrolysisOils - Wheat Straw - Wood
 Feedstock Emissions
 Prepared August 2010
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There is increased interest in the emissions associated with feedstock production for use in LCA work for non-transportation fuel pathways. For example, work has been done on establishing the carbon footprint for some livestock species as well as for milk production. All of this work needs either to include the production of feedstocks like corn, barley, and other feed grains, or to have emission factors for these materials.

This work has developed a new output sheet for the emissions from the production of feedstocks. The emissions are presented on the basis of g/tonne feedstock delivered. The emissions are presented for all of the GHG and CAC emissions in the model. The results from this work could be used as emission factors for other LCA work being undertaken by others.

This work will also allow for easier comparison to some of the emission estimates that have been produced by Agriculture Canada for feedstock production. This comparison should eventually allow for some reconciliation between the GHGenius estimates and the work that Agriculture Canada has been doing using somewhat different data sources.

The data in GHGenius is continually being updated as new information becomes available. Three new data sources have been identified for areas of the model that have not been updated for many years. These are the energy required to manufacture vehicles, the energy required to manufacture farm tractors, and some new information on canola production and crushing. All three changes result in some reduction in emissions for the fuel pathways that are impacted.

Tags: Canola - Feedstock - GHGenius 3.19
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