Sieving
Sieving is a simple technique for separating particles of different sizes. Coarse particles are separated or broken up by grinding against one another and the screen openings. Depending upon the types of particles to be separated, sieves with different types of holes are used. Sieving plays an important role in food industries where sieves (often vibrating) are used to prevent the contamination of the product by foreign bodies. The design of the industrial sieve is of primary importance here.
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Process and technologies
A sieve analysis (or gradation test) is a practice to assess the particle size distribution (also called gradation) of a granular material by allowing the material to pass through a series of sieves of progressively smaller mesh size and weighing the amount of material that is stopped by each sieve as a fraction of the whole mass.
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Technology providers
ABC
describe the company, here is an example
ABC was founded in 20... 12 by KNN and Syncom, in collaboration with the university of Groningen, Netherlands. The company is a technology provider developing chemical recycling technologies for different feedstocks including non-food bio- and plastics waste. In 2018 a pilot plant with the capability to process biomass and plastic waste was set up at the Zernike Advanced Processing (ZAP) Facility. The company is now focused on setting up their first commercial plant with a capacity of 20,000 to 30,000 tonnes. The investing phase B was recently completed, with the last investment phase in 2019 the financial requirements are fulfilled to complete the commercialisation activities to build the plant which is expected for 2023.
describe their technology, here is an example
The technology is based on an Integrated Cascading Catalytic Pyrolysis (ICCP) process, being able to produce aromatics including benzene, toluene, and xylene (BTX) as well as light olefins from low grade biomass and plastics waste. This technology utilises catalytic cracking in a two-step process at temperatures between 450- 850 °C. In the first step the feedstock material is vaporised via thermal cracking. The pyrolysis vapours are then directly passed into a second reactor in which they are converted into aromatics by utilising a zeolite catalyst which can be continuously regenerated. Finally, the products are separated from the gas via condensation. An ex situ approach of catalytic conversion has several advantages such as the protection of the catalyst from deactivation/degradation expanding its lifetime, a greater variety of feedstock, and a precise adjustment of process conditions (e.g. temperature, catalyst design, and Weight Hourly Space Velocity (WHSV) in each step for improved yields. In current pilot plant with 10 kg h-1 feed capacity for either waste plastics or biomass, final design details are established, which will be include in the running engineering activities for the commercial plant.
| General information | |||
| Company: | ABC | 
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| Country: | |||
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| Webpage: | https://biobtx.com/ | ||
| Technology and process details | |||
| Technology name: | Integrated Cascading Catalytic Pyrolysis (ICCP) technology | Technology category: | Conversion (Thermochemical processes and technologies) |
| TRL: | 5-6 | Capacity: | 10 kg·h-1 |
| Atmosphere: | Inert | Catalyst: | Zeolite |
| Heating: | Fluidised sand bed | Pressure: | 1-4 bar |
| Reactor: | Fluidised sand bed, fixed bed | Temperature: | 450-650 °C |
| Other: | Unknown | ||
| Feedstock and product details | |||
| Feedstock: | Biomass (liquid, solid), wood pulp lignin residues, used cooking oil | Product: | Benzene, toluene, xylene, aromatics, light gases |