Page 87 - Materials Chemistry, Second Edition
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3.1 Basics 71
Co-product A
Pre-product Intermediate
Unit process x
product
Co-product B
(a)
Co-product A
Pre-product Intermediate
Unit process x
product
Co-product B
System boundary
(b)
Figure 3.5 Allocation or system expansion with multi-output processes. (a) Case A: alloca-
tion necessary and (b) Case B: system expansion.
Incineration
Product
Production
and use of Landfill
product after use phase
Recycling
(open loop)
Recycling
(closed loop)
System boundary
Figure 3.6 Branching through several process options for an output.
