SOW - CDRILS-M Rev C.pdf

CARBON DIOXIDE REMOVAL BY IONIC

LIQUID SYSTEM FOR MOBILITY (CDRILS-M)

Rev. C July 18, 2025

STATEMENT OF WORK

FOR

CARBON DIOXIDE REMOVAL BY IONIC LIQUID

SYSTEM FOR MOBILITY (CDRILS-M)

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TABLE OF CONTENTS

PARAGRAPH PAGE

1.0 GENERAL

1.1 PURPOSE

1.2 BACKGROUND

1.3 SCOPE OF EFFORT

1.3.1 Base

2.0 DELIVERABLES

2.1 BASE

3.0 PERIOD OF PERFORMANCE

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CARBON DIOXIDE REMOVAL BY IONIC LIQUID SYSTEM FOR MOBILITY

1.0 GENERAL

1.1 PURPOSE

This statement of work (SOW) defines the tasks and deliverables associated with the initial feasibility for application of the Carbon Dioxide Removal by Ionic Liquid System (CDRILS) to a space suit life support system with the permutation referred to as Carbon Dioxide Removal by Ionic Liquid System for Mobility (CDRILS-M).

1.2 BACKGROUND

Carbon dioxide (CO2) and humidity control are essential features of the Extravehicular Mobility Unit (EMU) Portable Life Support Subsystem (PLSS). The PLSS for past EMUs such as the Shuttle and International Space Station (ISS) EMUs as well as the Exploration EMUs (xEMUs) have used solid adsorbents for CO2 and humidity control.

Carbon Dioxide Removal by Ionic Liquid System (CDRILS) utilizes a continuously recirculated ionic liquid sorbent and hollow fiber membrane contactors for CO2 removal from spacecraft cabin air. For the vehicle Environmental Control and Life Support System (ECLSS) application, CDRILS is undergoing development for a flight demonstration on the International Space Station (ISS) in 2028. As an extension of the approach used for CDRILS in the ECLSS application, Honeywell and the NASA Space Suit & Crew Survival Systems Branch are exploring a variation of CDRILS as the CO2 and humidity removal technology for the NASA Mars Exploration EMU (mxEMU) concept referred to as Carbon Dioxide Removal by Ionic Liquid System for Mobility (CDRILS-M). The continuous removal, liquid based CO2 and humidity control approach for a Mars Exploration application such as the Mars Exploration Extravehicular Mobility Unit (mxEMU) include:

Non-venting EVA capability in which H2O and CO2 captured in the sorbent are not vented into the environment during EVA o This enables recovery of these constituents back into the cabin ECLSS processing loop.

o The environment being explored by EVA capability receives reduced contamination loading

Inclusion of trace contaminant removal in the sorbent without need for a separate consumable component to perform that function

Improved long duration mission serviceability o Liquid sorbent can be changed out or replaced as part of maintenance without the overhead that would be present for replacing an existing state of the art scrubber such as the Metal Oxide canister (~32 lbs) or Rapid Cycle Amine (~16 lbs) using smaller or more discrete components.

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The goal for convergence of the liquid sorbent with that of the vehicle ECLSS system such that sparing and maintenance could be reduced with the commonality.

In order to proceed with the feasibility for the space suit application, this effort will research alternative sorbents and operating configurations targeted to this application and characterize the forward path options for implementation to advance the state-of-the-art of carbon dioxide removal required to enable NASA’s human exploration missions.

The CDRILS-M will need to be rechargeable for surface operations at a minimum of two crew members.

1.3 SCOPE OF EFFORT

The Contractor shall provide all materials, tooling, test equipment, test facilities, analysis tools, and labor required to complete the effort defined in this SOW with the exception of the Calnetix Government Furnished Equipment (GFE) blower (Part/Number (P/N) TBD) as detailed under Section 1.4 of the this SOW.

2.0 REFERENCE AND APPLICABLE DOCUMENTS

The work performed shall conform to the requirements defined in this SOW and in the applicable documents listed below. Reference documents are listed below to assist in performing the scope.

2.1 Applicable Documents

NPR 7123.1D NASA Systems Engineering Processes and Requirements

2.2 Reference Documents

N/A

3.0 TASK DESCRIPTION

The following section provides a description of the scope of work for the CARBON

DIOXIDE REMOVAL BY IONIC LIQUID SYSTEM FOR MOBILITY (CDRILS-M). A

Contracting Officer’s Representative (COR) is assigned by the Contracting Officer to be the technical point of contract for this SOW.

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3.1 Base

The contractor shall perform the following work scope as part of this effort:

1. The contractor shall perform a WorkPlan Review for the following Tasks.

2. Leveraging on-going work from CDRILS contract # 80MSFC18C0045, the contractor shall perform aging studies for the membrane contactor and ionic liquid as described below:

a. The Contractor shall analyze root cause of performance degradation as reported under Contract # 80MSFC18C0045.

b. The contractor shall develop and test mitigation concepts associated with item 2a above.

c. The Contractor shall complete membrane contactor durability optimization and characterization. This shall include testing of a minimum of four membrane coatings identified under contract # 80MSFC18C0045. The contractor shall pursue developmental options while testing of existing membranes occurs.

d. The goal is to ensure reliability of the CDRILS-M system for a duration of three (3) years. The contractor shall test the membrane contactors to reach this goal until contract end. This testing shall include the Suit Water Membrane Evaporator (SWME) provided to the contractor as described in Section 1.4 of this SOW.

The contractor shall continue optimization and characterization of the SWME cartridge.

e. The Contractor shall complete ionic liquid mixture durability optimization.

f. The Contractor shall evaluate aging of the existing materials as identified under CDRILS contract #80MSFC18C0045.

g. The Contractor shall optimize contactor configuration and perform durability test of optimized configuration, membrane, and ionic liquid mixture.

i. Evaluate Mars Exploration Extravehicular Mobility Unit (mxEMU) CDRILS-M application.

h. The Contractor shall perform a materials compatibility study of the selected ionic liquid with metals and polymers including EA9313 used in potting of the membrane contactor.

3. Conduct the development of a 2-person CDRILS system to pair with CDRILS-M on the suits assuming an operating scenario with 2 crew living in a small surface habitat with both crew performing EVA in space suits equipped with CDRILS-M:

a. Select a CDRILS-M configuration that will provide the best capacity and rate informed by the breadboard experiment results.

b. The Contractor shall evaluate use of Calnetix GFE blower (P/N TBD*) in a two-person CDRILS..

i. If the GFE blower cannot be used due to availability, function, or performance substitute a Commercial Off-the-Self (COTS) blower

c. The Contractor shall test the dehumidifiers procured under the prior CDRILS contract #80MSFC18C0045 to determine the best dehumidifier to use in the CDRILS design.

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d. The Contractor shall test the CDRILS-M with Sabatier (Delivered under CDRILS contract #80MSFC18C0045).

4. The contractor shall provide a final test report summarizing the work at the completion of tasks.

5. The contractor shall perform a summary briefing at the completion of tasks.

6. The contractor shall deliver a workplan through Systems Requirements

Review (SRR) for an Integrated Two-Person Regenerator with a CDRILS-M System.

7. The contractor shall provide options to achieve Preliminary Design Review (PDR) and Critical Design Review (CDR) for an Integrated Two-Person Regenerator with a CDRILS-M System.

8. The contractor shall hold a Preliminary Design Review for the development effort under this SOW.

NOTE: *TBD – There are multiple configurations of Calnetix blowers available from the International Space Station (ISS) Program. NASA will identify the detailed configuration to be provided closer to the time of shipment.

4.0 GOVERNMENT FURNISHED EQUIPMENT

The Calnetix GFE blower (Part/Number (P/N) TBD) will be provided to the contractor by NASA for the evaluation in the two-person CDRILS stripper.

The Suit Water Membrane Evaporator (SWME) will be provide to the contractor by NASA for evaluation.

5.0 DELIVERABLES

5.1 BASE

The contractor shall deliver data and hardware as described below:

No. Title Qty Due

1 Kick-off Presentation and meeting 1 1 month post ATP

2 Monthly Status - written

Summary in Word/PowerPoint of monthly activities with key activities including photos, relevant data, etc.

A/R 1st Monday each Month

3 Monthly Status - Telecon

- Brief 30-60 minute telecon covering the monthly status summary and for coordination of any joint activities, etc.

A/R Time to be established within a month of ATP

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4 Final Report for Tasks 1-4

1 7 months post ATP

5 Work Plan Review 1 As agreed to after

ATP

6 Systems Requirements Review for Tasks 1 One month prior to contract end

7 Systems Requirements Review Package according to 023 Applicable Reference

One month prior to contract end

7 Final Report for Tasks 1 At Contract End

6.0 PERIOD OF PERFORMANCE

The period of performance will be through November 15, 2026.