The present application provides a material for efficiently removing active hydrogen-containing compounds such as alcohol compounds. The present application uses an active hydrogen-containing organic compound scavenger having a bromine content of from 38 to 78 wt % represented by the formula (1) (wherein R.sup.1 and R.sup.2 each independently represent a hydrogen atom or a C.sub.1-4 alkyl group, each R.sup.3 independently represents a hydrogen atom, a C.sub.1-4 alkyl group or a bromine atom, m represents at least one selected from the group consisting of 0, 1, 2 and 3, and n represents a real number of 0 or more) (wherein the isocyanate compound may be a single species or a mixture of two or more species, and in the case of a mixture, n represents an average n of the mixture).

The invention relates to a method for synthesizing silicoaluminophosphate sorbents such as SAPO-56 and SAPO-47 comprising the use of a specific structure directing agent (SDA) comprising a mixture of different types of amines The structure providing agent (SDA) comprises N,N,N,N-tetramethyl-1,6-hexanediamine (TMHD) and a co-structure providing agent (co-SDA) selected among primary, secondary and tertiary amines comprising up to 15 carbon atoms and mixtures thereof. A preferred SDA comprises isopropylamine, dibutylamine and tripropylamine The sorbents are particularly suitable for up-grading biogas such as separating carbon dioxide from methane.

Examples of systems, apparatus and methods for separating oxygen from air are provided herein. The system comprises a separating column that includes an oxygen separating compound packed in the column for selectively and reversibly binding oxygen from the air and for releasing the selectively bound oxygen upon being heated, a heater thermally coupled to the separating column, a heat removal apparatus and an air flow controller.

Devices, systems and methods for using photosynthetic biomass to purify water, reduce indoor air pollution, remove greenhouse gases including CO.sub.2 from outdoor atmospheric air, and produce biofuel, food products, and fertilizer are provided herein. Also provided herein are systems and methods for enhancing growth of a photosynthetic biomass in a greenhouse.

A gas separation unit for the separation of a first gas, carbon dioxide, from a mixture, by using an adsorption/desorption process using a loose particulate sorbent material arranged in at least two stacked layers. The primary heat exchange piping is arranged on the two outer edges of the layer within the cavity extending along a longitudinal direction. Further, an essentially parallel array of secondary heat exchange pipes is provided, the secondary heat exchange pipes extending along a transverse direction. The first diameter of the secondary heat exchange pipes is at least twice as large as the second outer diameter of the secondary heat exchange pipes and the secondary heat exchange pipes are in thermal contact with sheets of metal which extend oscillating between pairwise adjacent secondary heat exchange pipes.

An air treatment system for at least partially removing at least one gaseous contaminant contained in indoor air of a room structured for human occupants. The system may comprise an air treatment assembly having an indoor air inlet configured to receive indoor airflow directly from a room, a regenerable adsorbent material configured to adsorb at least one gaseous contaminant contained in the indoor airflow, at least one airflow element for directing the indoor airflow to flow through the air treatment assembly, an indoor air outlet for expelling the indoor air, from the air treatment assembly back into the room, a purge air inlet configured to receive and direct purge air over and/or through the adsorbent material for removal of at least a portion of the at least one gaseous contaminant, and a purge air outlet for expelling the purge air out of the air treatment assembly.

Porous materials (such as organic polyamine cage compounds) and methods of stabilising porous materials which are otherwise prone to pore-collapse are described. Such stabilisation is accomplished through the use of molecular ties to create bridges between reactive groups of a (potentially) porous material to thereby strengthen and stabilise the porous structure. The chemistry involved in, and the results of, the stabilisation of porous materials to provide a new sorption composition comprising the very materials which are generally prone to pore-collapse are also described.

A sorbent useful for CO.sub.2 capture is described, including a solid support with CO.sub.2-sorbing amine and ionic liquid thereon. The ionic liquid is catalytically effective to enhance sorbent characteristics such as (i) CO.sub.2 sorption capacity, (ii) CO.sub.2 sorption rate, (iii) CO.sub.2 desorption capacity, (iv) CO.sub.2 desorption rate, and (v) regeneration temperature, in relation to a corresponding sorbent lacking the ionic liquid. In specific implementations, the sorbent is regenerable at temperatures significantly below 100 C., thereby avoiding the need for steam heat desorption and enabling utilization of waste heat or other low energy thermal regeneration sources.

The disclosure discloses a furan skeleton-containing iminoguanidine derivative, comprising 2,5-furan-bis(iminoguanidine) and acceptable salts of 2,5-furan-bis(iminoguanidine) as well as solvates thereof. The disclosure also discloses a preparation method of 2,5-furan-bis(iminoguanidine) and its use as an acidic gas absorbent and an anionic precipitant. The 2,5-furan-bis(iminoguanidine) of the disclosure can be conveniently regenerated and recycled alter absorbing acidic gases, is low in regeneration energy consumption and has reduced cost and improved efficiency. The 2,5-furan-bis(iminoguanidine) of the disclosure is simple in preparation, mild in reaction conditions, short in reaction time, high in yield and low in cost, and is easily prepared on large scale.

The present invention relates to the field of air cleaning, and specifically discloses an air freshener composition. The air freshener composition comprises component A and component B, wherein a weight ratio of the component A to the component B is 1:0.5-3; the component A comprises, in parts by weight, 10-30 parts by weight of an active agent; 6-15 parts by weight of a carrier; 1-4 parts by weight of a pH regulator; and 0.01-0.2 part by weight of an antioxidant; the component B is a plant extract solution, wherein the plant extract solution comprises at least, in parts by weight: 5-30 parts by weight of an extract of a mixture of Populus nigra var. italica, grapefruit peels and eucalyptus leaves; 0.1-5 parts by weight of Sophora flavescens extract; 1-3 parts by weight of Aloe vera extract; 1-10 parts by weight of fresh orange peel extract; 0.5-3 parts by weight of Nandina domestica extract; 0.5-10 parts by weight of Eucalyptus robusta Smith extract; 1-8 parts by weight of Robinia pseudoacacia L. extract; 1-5 parts by weight of Chrysanthemum morifolium extract; and 0.1-2 parts by weight of artemisinin.