A portable pressure swing adsorption system and method for fuel gas conditioning. A fuel gas conditioning system includes a pressure swing adsorption (PSA) system fluidly coupled to a compressed rich gas stream, the PSA system including a plurality of adsorbent beds and configured to condition the compressed rich natural gas stream and produce therefrom a high-quality fuel gas and gaseous separated heavier hydrocarbons, a product end of the adsorbent beds fluidly coupled to a fuel gas line, and a feed end of the adsorbent beds configured to be fluidly coupled to the compressed rich natural gas stream or a raw natural gas stream, wherein the produced gaseous separated heavier hydrocarbons are desorbed at at least 50 psia and recirculated into the rich natural gas stream or the raw natural gas stream without post-desorption compression.

A gas separation system includes a separation column for separating components contained in sample gas, a sample gas supplier fluidly connected to an inlet of the separation column for supplying sample gas to the separation column, a detector fluidly connected to an outlet of the separation column, a collection tube filled with an adsorbent having a property of adsorbing a target component in the sample gas under a condition of a first temperature or less and desorbing the adsorbed target component under a condition of a second temperature or more higher than the first temperature, a temperature adjuster for adjusting a temperature of the collection tube, a collection container for collecting the target component, and a switching mechanism for switching between a state in which the collection tube is connected to an outlet of the detector and a state in which the collection tube is connected to the collection container.

A natural gas adsorptive separation system and method is described. A method of separating natural gas includes directing a natural gas mixture through an activated carbon adsorption tower until the adsorption tower is saturated, collecting methane from the output of the adsorption tower, heating the saturated carbon adsorption tower with adsorbate using a heater and/or a vacuum pump in a closed loop circuit with the carbon adsorption tower until the input to the vacuum pump is within a specified temperature of the output of the heater, lowering the pressure in the heated activated carbon adsorption tower using the vacuum pump to desorb at least one hydrocarbon compound of the plurality of different hydrocarbon compounds, compressing and cooling the desorbed hydrocarbon compound, separating the cooled and compressed hydrocarbon compound into gas and liquid in a fluid separator, and collecting the liquid from the fluid separator.

Systems and methods for heat exchange during gas adsorption and desorption cycling, one method including removing heat from an adsorbent material during gas adsorption to the adsorbent material; storing the removed heat for later use during desorption of gas from the adsorbent material; heating the adsorbent material during desorption of gas from the adsorbent material using at least a portion of the removed heat; and recycling heat during the step of heating to prepare a working fluid for the step of removing heat via temperature reduction of the working fluid.

Device for conditioning air in an enclosed space, including first and second sorption units, each for being transferred from a sorption mode into a desorption mode and vice-versa; and to, in the sorption mode, sorb the one or more air constituents from air of the enclosed space; and to, in the desorption mode, desorb the one or more air constituents, and including an air distribution device to, in a first operating state, switch to a second operating state in which exchange of the air of the enclosed space with exterior air may be provided, if it is determined that a concentration of at least one air constituent of the one or more air constituents is above a limit, and, in the second operating state, switch to the first operating state, if it is determined that concentrations of all air constituents of the one or more air constituents are within their corresponding limit.

The disclosure provides a method and system for extracting carbon dioxide from an exhaust gas. The method includes lowering a temperature of an exhaust gas using a heat exchanger, lowering a concentration of a particulate matter within the lowered temperature exhaust gas, and passing the lowered particulate concentration and lowered temperature exhaust gas through one or more membrane modules to produce a membrane module permeate flow that contains a higher concentration of carbon dioxide compared to a concentration of carbon dioxide in the lowered particulate concentration and lowered temperature exhaust gas. Further, the system includes a heat exchanger fluidly coupled to a particulate filter that is configured to lower a concentration of the particulate matter within the exhaust gas, and one or more membrane modules fluidly coupled to the particulate filter and configured to produce the membrane module permeate flow.

A process for the production of at least one of amorphous carbon or graphite, preferably of carbon black, from atmospheric air, biogas or flue gas CO2 is given, including at least the following steps: a) isolation of concentrated CO2 of a concentration of at least 50% v/v from atmospheric air, green house air or flue gas preferably by means of a cyclic adsorption/desorption process on amine-functionalized adsorbents; b) conversion of said captured CO2 into a gaseous or liquid saturated or unsaturated hydrocarbon by hydrogenation: c) cracking of said saturated or unsaturated hydrocarbon to at least one of amorphous carbon or graphite, preferably carbon black, wherein the H2 resulting from step c) is at least partially used in the hydrogenation of step b).

Systems including a moisture pump for removing moisture from an inside environment to an outside environment. The moisture pump includes a housing defining a chamber with a heater, a heat spreader, and a desiccant for selectively adsorbing water vapor in the heating chamber when the heater is off and desorbing water vapor into the heating chamber when the heater is on. A valve assembly is also maintained by the housing transitionable between an adsorption position and desorption position. The adsorption position allows water vapor to be selectively transmitted into the heating chamber from the inside environment. The desorption position allows water vapor to be transmitted from the heating chamber for transmission into the outside environment. The adsorption and desorption ports can have asymmetric adsorption and desorption areas.

There is provided a liquid water harvester based on a valve-controlled active air supply and belongs to the field of liquid water harvesters. The present disclosure aims to address the problem of low airflow speed, high environmental humidity requirements, and auxiliary heating of an adsorption stage in the current atmospheric water harvesting technologies. In the present disclosure, the active air supply device is used to speed up the air circulation in the harvester so as to greatly shorten the adsorption time of the moisture absorbing material for the water vapor in the air and improve the heat dissipation of the micro-nano structure condensation surface. The electric valve controls the air circulation circuit and cooperates with the active air supply device. In this case, only one active air supply device can be used to complete the air supply and the condensation heat dissipation at the same time.

A membrane-based desorption cooling method for passive thermal management is presented. The module includes: (i) a covering layer for thermally conducting and transferring heat from a device to a solution; (ii) a solution layer for confining H.sub.2O/absorbent mixtures in a multi-compartment frame; (iii) a membrane layer configured to act as an interface between the solution and air; and (iv) a supporting layer configured to increase the mechanical strength and including apertures to permit mass transfer from the membrane through the supporting layer. The present membrane-based desorption cooling module is able to be used for thermal management of solar photovoltaic (PV) panels, electronics, batteries, or any other devices that require heat removal.