Aircraft cabin contaminant removal using liquid sorbent

An aircraft contaminant removal system comprising:

• a membrane separator configured to:
• in a scrubbing mode:
• receive a cabin air stream from a cabin of an aircraft;
• absorb a contaminant from the cabin air stream into a liquid sorbent;
• and
• discharge a clean air stream;
• and
• in a stripping mode:
• receive an external air stream;
• desorb the contaminant from the liquid sorbent using the external air stream;
• and
• discharge the contaminant in a contaminant stream.

An aircraft contaminant removal system comprising:

• a membrane scrubber-separator configured to:
• receive a cabin air stream;
• absorb a contaminant from the cabin air stream into a liquid sorbent;
• and
• discharge a clean air stream;
• a membrane stripper-separator configured to:
• desorb the contaminant from the liquid sorbent;
• and
• discharge the contaminant in a contaminant stream;
• and
• a thermal management system configured to maintain a temperature of the liquid sorbent using one or more heat exchangers fluidically coupled to an aircraft air stream.

An aircraft contaminant removal system comprising:

• a membrane scrubber-separator configured to:
• receive a cabin air stream from a cabin of an aircraft;
• absorb a contaminant from the cabin air stream into a liquid sorbent;
• and
• discharge a clean air stream;
• a membrane stripper-separator configured to:
• desorb the contaminant from the liquid sorbent;
• and
• discharge the contaminant in a contaminant stream;
• and
• a humidity management system configured to maintain a humidity of the clean air stream or a water concentration of the liquid sorbent using one or more water sources of the aircraft,
• wherein at least a portion of water from the one or more water sources is recycled to the liquid sorbent.

An aircraft contaminant removal system comprising:

• a membrane scrubber-separator configured to:
• receive a cabin air stream from a cabin of an aircraft;
• absorb a contaminant from the cabin air stream into a liquid sorbent;
• and
• discharge a clean air stream;
• a membrane stripper-separator configured to:
• desorb the contaminant from the liquid sorbent;
• and
• discharge the contaminant in a contaminant stream;
• and
• a humidity management system configured to maintain a humidity of the clean air stream or a water concentration of the liquid sorbent using one or more water sources of the aircraft,
• wherein the humidity management system further comprises a water vaporizer configured to add water from the one or more water sources to at least one of:
• the clean air stream;
• or
• a sweep gas stream of the stripper-separator.

An aircraft contaminant removal system comprising:

• a membrane scrubber-separator configured to:
• receive a cabin air stream from a cabin of an aircraft;
• absorb a contaminant from the cabin air stream into a liquid sorbent;
• and
• discharge a clean air stream;
• a membrane stripper-separator configured to:
• desorb the contaminant from the liquid sorbent;
• and
• discharge the contaminant in a contaminant stream;
• and
• a humidity management system configured to maintain a humidity of the clean air stream or a water concentration of the liquid sorbent using one or more water sources of the aircraft,
• wherein the humidity management system comprises a dehumidifier configured to return humidity from the cabin air stream to the clean air stream using the clean air stream from the scrubber-separator as a sweep gas stream.

An aircraft contaminant removal system comprising:

• a membrane scrubber-separator configured to:
• receive a cabin air stream from a cabin of an aircraft;
• absorb a contaminant from the cabin air stream into a liquid sorbent;
• and
• discharge a clean air stream;
• a contaminant membrane stripper-separator configured to:
• desorb the contaminant from the liquid sorbent;
• and
• discharge the contaminant in a contaminant stream;
• and
• a humidity management system configured to maintain a humidity of the clean air stream or a water concentration of the liquid sorbent using one or more water sources of the aircraft,
• wherein the humidity management system further comprises a water stripper-separator configured to:
• receive liquid sorbent from the contaminant stripper-separator;
• and
• receive the clean air stream as a sweep gas stream.

An aircraft contaminant removal system comprising:

• a membrane scrubber-separator configured to:
• receive a cabin air stream from a cabin of an aircraft;
• absorb a contaminant from the cabin air stream into a liquid sorbent;
• and
• discharge a clean air stream;
• a membrane stripper-separator configured to:
• desorb the contaminant from the liquid sorbent using a ram air stream as a sweep gas stream;
• and
• discharge the contaminant in a contaminant stream;
• and
• a humidity management system configured to maintain a humidity of the clean air stream or a water concentration of the liquid sorbent using one or more water sources of the aircraft.

An aircraft contaminant removal system comprising:

• a membrane scrubber-separator configured to:
• receive a cabin air stream from a cabin of an aircraft;
• absorb a contaminant from the cabin air stream into a liquid sorbent;
• and
• discharge a clean air stream;
• a membrane stripper-separator configured to:
• desorb the contaminant from the liquid sorbent;
• and
• discharge the contaminant in a contaminant stream;
• a humidity management system configured to maintain a humidity of the clean air stream or a water concentration of the liquid sorbent using one or more water sources of the aircraft;
• and
• a manifold configured to:
• receive a cooled and pressurized conditioned air stream from an air conditioning system;
• receive the clean air stream from the membrane scrubber-separator;
• and
• control flow rates of the conditioned air stream and the clean air stream to achieve a target contaminant concentration, temperature, and pressure of the cabin.