The invention relates to a method and installation for recycling a polystyrene based material containing organohalogen flame retardant, comprising the steps of: (i) dissolving the polystyrene based material in a high-boiling, apolar, organic reaction solvent: (ii) heating the polystyrene contained in the reaction solvent to a temperature so as to release halogen from the flame retardant; (iii) contacting released halogen with a base so as to form a halogen residue; (iv) removing the halogen residue; (v) pyrolyzing polystyrene contained in the reaction solvent at a temperature so as to depolymerize polystyrene; and (vi) distilling the depolymerized mixture into at least a styrene fraction. For recycling expanded polystyrene the method and installation additionally comprises a step of compacting expanded polystyrene in an compaction solvent, whereafter preferably the compaction solvent is at least partly replaced by the reaction solvent.

A recycled-carbon-fiber tow composition comprising a recycled carbon fiber tow taken from a carbon-fiber-reinforced thermosetting resin molded body; and a surface modifier having a chemical functional group (hereinafter, referred to as second chemical functional group) that has chemical affinity with a chemical functional group (hereinafter, referred to as first chemical functional group) existing on a surface of the carbon fiber, wherein the recycled carbon fiber tow is formed such that carbon fibers are bundled into a tow with amorphous carbon that substantially contains no resin residue, the recycled-carbon-fiber tow composition contains 0.1 to 1 weight % of the surface modifier when an entirety of the recycled-carbon-fiber tow composition is 100 weight %, and n amount of residual carbon content measured when the recycled-carbon-fiber tow composition has been heated in a condition of 600? C.?60 minutes is 1 to 5 weight %.

The present invention relates to a method for recycling scrap rubber comprising the steps of pyrolyzing scrap rubber to obtain a char material and milling the thus obtained char material. The present invention also relates to carbon black powders and carbon black pellets obtained by the method according to the invention. Moreover, the present invention relates to the use of said carbon black powder and to compositions comprising said carbon black powders.

A multifunctional ship for the collection and recycling of ocean debris and the system thereof may include a hull; a detection device provided on the hull to detect ocean debris floating on the sea or deposited on the seabed; a collection device installed on the hull to collect the ocean debris detected by the detection device; a sorting device installed on the hull to sort the ocean debris collected by the collection device; a compressing device installed on the hull to compress the sorted ocean debris to compress and remove moisture and reduce the volume; a waste plastic recycling device installed on the hull to produce recycled oil by thermally decomposing the waste plastic compressed in the compressing device; a storage tank installed at the bottom of the hull to store the recycled oil produced; and a purifier for purifying wastewater generated in the process of producing recycled oil.

High surface area 3D mesoporous carbon nanocomposites can be derived from Zn dust and PET bottle mixed waste with a high surface area. Simultaneous transformation of Zn metal into ZnO nanoparticles and PET bottle waste to porous carbon materials can be achieved by thermal treatment at preferably 600 to 800? C., and reaction times of from 15 to 60 minutes, after optionally de-aerating the reaction mixtures with N.sub.2 gas. The waste-based carbon materials can have surface areas of 650 to 725 m.sup.2/g, e.g., 684.5 m.sup.2/g and pore size distributions of 12 to 18 nm. The carbon materials may have 3D porous dense layers with a gradient pore structure, which may have enhanced photocatalytic performance for degrading, e.g., organic dyes, such as methylene blue and malachite green. Sustainable methods make ZnO-mesoporous carbon materials from waste for applications including photocatalysis, upcycling mixed waste materials.

A method for producing a fiber assembly, including: putting a plurality of fibers and a fiber treatment agent into a stirring tank; and stirring a mixture of the fibers and the fiber treatment agent with a stirring blade to granulate the mixture, wherein the fibers include carbon fibers, and the mixture is granulated such that the fibers are aligned. A method for producing a fiber assembly, wherein a plurality of fibers containing carbon fibers and a liquid are put into a stirring tank and the mixture of the fibers and the liquid is stirred with a stirring blade, thereby obtaining a fiber assembly which has a spheroidal shape or a strand shape.

A continuous flow pyrolytic reactor (200) equipped with one or more pyrolysis chamber assemblies (204) is disclosed. A positive pressure waste feeder hopper (100) for the pyrolytic reactor and its respective furnace, in addition to a pyrolysis system for the use of waste. The pyrolytic reactor (200) having a plurality of cylindrical pyrolysis chambers (201) provided, within it, with an endless screw conveyor (202) arranged longitudinally. The worm conveyor screw (202) is provided with a shaft (203), the shaft (203) being coupled to the bases of the pyrolysis chamber (201). The shaft (203) is further coupled to a rotation device that transfers torque to the shaft (203) by rotating the worm conveyor screw (202). The cylindrical pyrolysis chambers (201) are housed in an insulating housing (300) having within it two or more assemblies (204). The assemblies (204) are fed by a hopper (100) forming a pyrolysis system.

High surface area 3D mesoporous carbon nanocomposites can be derived from Zn dust and PET bottle mixed waste with a high surface area. Simultaneous transformation of Zn metal into ZnO nanoparticles and PET bottle waste to porous carbon materials can be achieved by thermal treatment at preferably 600 to 800? C., and reaction times of from 15 to 60 minutes, after optionally de-aerating the reaction mixtures with N.sub.2 gas. The waste-based carbon materials can have surface areas of 650 to 725 m.sup.2/g, e.g., 684.5 m.sup.2/g and pore size distributions of 12 to 18 nm. The carbon materials may have 3D porous dense layers with a gradient pore structure, which may have enhanced photocatalytic performance for degrading, e.g., organic dyes, such as methylene blue and malachite green. Sustainable methods make ZnO-mesoporous carbon materials from waste for applications including photocatalysis, upcycling mixed waste materials.

Provided is a pyrolysis method of waste plastics including the steps of inputting waste plastics to a batch reactor and performing heating to produce a waste plastic melt at a first temperature; heating the waste plastic melt to remove chlorine from the melt at a second temperature; and heating the waste plastic melt from which chlorine has been removed to produce a pyrolysate at a third temperature. The batch reactor is sequentially heated in a direction from a raw material inlet to a reaction product outlet so that the temperature is raised from the first temperature to the third temperature.

Continuous thermal processing of used or damaged tires carried out by thermal decomposition in a closed vertically oriented reaction space in the presence of a controlled flow of air blowing into it from below, by the action of flue gases passing from the tires ignited at the bottom of the reaction space upwards, along the tires stacked and continuously replenished in the reaction space to form their thermal decomposition products, discharged from the reaction space to be further processed.