No, not at all.
The EMU Contaminant Control Cartridges (CCC) were rectangular.
Information on the CCC:
When ventilation gas returns from the HUT to the PLSS, it first passes
through the CCC. As the ventilation gas flows through the cartridge to
the fan, beds of chemicals remove CO 2 , odors, and contaminants,
while filters remove particulates. Two versions of the CCC exist: a
lithium hydroxide (LiOH) canister, and a Metal Oxide (Metox) canister.
Both serve the same operational function; however, the LiOH canister
is used for shuttle-based EVAs, and the Metox canister is used for
ISS-based EVAs.
The cartridge is located in a compartment on the back
of the PLSS under a TMG flap that unzips to provide access (Figure
3-17). It can be removed and replaced on orbit by a single IV
crewmember without tools in less than 5 minutes. The canister can be
replaced while a crewmember is in the suit, but the EMU must be in a
pressurized environment. The CCC is changed out between successive
EVAs.
The shuttle cabin cartridges were cylindrical.
Information on the cabin cartridges:
Odor and CO 2 are removed from the cabin air by the LiOH canisters. A
flow orifice directs approximately 120 lb/hr of air through each of
the two LiOH canisters (Figure 3-1). Activated charcoal in the
canister controls odor; CO 2 is removed from the air when the CO 2
reacts with the LiOH to produce lithium carbonate. The LiOH canisters
are changed out periodically during the mission on a predetermined
schedule, generally one or two times per day based on the number of
crewmembers. The LiOH canisters are located in the ECLSS bay and are
accessible through the MD54G opening in the middeck floor (Figure
3-2). Up to 30 spare LiOH canisters are located in the ECLSS bay below
Panel MD52M.
As far as contractors go, Hamilton Standard built the EMU PLSS. Rockwell was the orbiter contractor but Ham Standard also supplied a lot of the ECLSS components.
References
EMU Systems Workbook
Carbon Dioxide Removal - Thermodynamics
Environmental Control and Life Support System (ECLSS) Training Manual
Acronymology:
EMU - Extravehicular Mobility Unit
EVA - Extravehicular Activity
HUT - Hard Upper Torso
IV - IntraVehicular
MD54G & MD52M - Shuttle middeck locations
PLSS - Portable Life Support System
TMG - Thermal / Micrometeorite Garment
