In order to assist with the navigation of the reports, each of the reports on this page has had the keywords tagged. All of the tags used are on the left. Clicking on a tag will then show all of the reports that have that keyword. All of the tags that are used with that keyword are then shown listed above the reports.
· Acetic acid
· Ammonium sulphate
· Citric acid
· Hydrochloric acid
· Magnesium silicate
· Nitric acid
· Phosphoric acid
· Potassium hydroxide
· Sodium methylate
One additional change to this section of the model has been made. In some processes there is a significant amount of electricity that is used for some of the chemical inputs and the model had used generic power for the calculation of emissions for these chemicals. This meant that the chemical GHG emissions were dependent on the location where they were used and not necessarily where they were produced. This has been changed so that the user can choose between using the average Canada power, the average US power or the regional generic power for the chemical production.
The second task has been to expand the treatment of co-products in the model. Over the years, the co-products have been added on a when required basis for each new pathway. This has resulted in a somewhat inconsistent treatment of the calculation methodology. A more structured approach to calculating the energy and emissions that are displaced by the co-products has been adopted, more like the approach used on the Alt Fuel Prod sheet for the input chemicals. This should make it easier to add new co-products in the future as bio-refineries develop.
Some additional co-products, or co-product uses have been added. Some biodiesel plants are using glycerine as an animal feed, or as a source of fuel. Others are using it as a feedstock for propylene glycol production.
Some LCA models use alternate co-product allocation methods other than system expansion/displacement such as mass or energy allocation. The functionality of GHGenius has been expanded to allow the user to choose between displacement (default), mass, or energy allocation.
The third part of the update has been to re-organize some sheets. As the model developed and new pathways or functions were added, the layout of some of the sheets becomes compromised and less than ideal. Many of these compromises have been addressed.
Tags: Co-products - GHGenius 4.00