Screw pyrolysis with integrated sequential hot gas filtration

Morgano, Marco Tomasi; Leibold, Hans; Richter, Frank; Seifert, Helmut

doi:10.1016/j.jaap.2014.12.019

Cited by 49 publications

(19 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pyrolysis experiments were carried out using the pilot scale screw reactor system at Institute for Technical Chemistry, KIT, previously described by Tomasi Morgano et al [39,40]. Its components are shown schematically in Fig.…”

Section: Pyrolysis Reactormentioning

confidence: 99%

Chemical Recycling of Mixed Plastic Wastes by Pyrolysis – Pilot Scale Investigations

Zeller

Netsch

Richter

et al. 2021

Chemie Ingenieur Technik

Self Cite

View full text Add to dashboard Cite

Chemical recycling of plastic wastes can be a useful complement to mechanical recycling to achieve the required plastics recycling rates and to establish a circular economy that is climate neutral and resource‐efficient. Different mixed plastic wastes that are subject to future recycling efforts are studied under uniform conditions of intermediate pyrolysis characterized by a medium heating rate and pyrolysis temperature. Product distributions and selected product properties are determined, and process mass and energy balances are derived. Product yields and compositions are highly dependent on the waste pyrolyzed. The results show that pyrolysis is a suitable process to recover chemical feedstock from various complex mixed plastic wastes.

show abstract

Section: Pyrolysis Reactormentioning

confidence: 99%

Chemical Recycling of Mixed Plastic Wastes by Pyrolysis – Pilot Scale Investigations

Zeller

Netsch

Richter

et al. 2021

Chemie Ingenieur Technik

Self Cite

View full text Add to dashboard Cite

show abstract

“…Intermediate pyrolysis is carried out at lower heating rates and higher vapor residence times than fast pyrolysis, and approximately 30-40% char is obtained [47,48]. Intermediate pyrolysis chars were suggested for fuel or soil amendment applications based on the atomic C:O ratio, moisture content, and heating values [23,165,166].…”

Section: Intermediate Pyrolysismentioning

confidence: 99%

“…Intermediate pyrolysis chars were suggested for fuel or soil amendment applications based on the atomic C:O ratio, moisture content, and heating values [23,165,166]. Intermediate pyrolysis at a large scale is a relatively new method for the production of biochars, and information on their properties is scarce compared to studies on fast and slow pyrolysis [48]. However, intermediate pyrolysis is an interesting process, because it is usually performed in screw (auger) reactors under controlled process conditions therefore allowing a wide range of process optimizations, ranging from heat carriers to gas flow rate, temperature, and solid residence times [167,168].…”

Section: Intermediate Pyrolysismentioning

confidence: 99%

“…Screw reactors also have certain advantages over the conventional fast pyrolysis fluidized bed reactors such as inert gas requirements and feed size requirements [169]. The production of intermediate pyrolysis chars in screw reactors is an interesting process, because it is possible to obtain different target products at different positions of the reactor, i.e., cellulose-derived products at the middle and lignin-derived products at the tail [48]. Recently a new process called biothermal valorization of biomass (BtVB) was proposed to produce heat, energy, and charcoals based on the combination of intermediate pyrolysis and gasification [170,171].…”

Section: Intermediate Pyrolysismentioning

confidence: 99%

See 1 more Smart Citation

State-of-the-Art Char Production with a Focus on Bark Feedstocks: Processes, Design, and Applications

Şen

Pereira

2021

Processes

View full text Add to dashboard Cite

In recent years, there has been a surge of interest in char production from lignocellulosic biomass due to the fact of char’s interesting technological properties. Global char production in 2019 reached 53.6 million tons. Barks are among the most important and understudied lignocellulosic feedstocks that have a large potential for exploitation, given bark global production which is estimated to be as high as 400 million cubic meters per year. Chars can be produced from barks; however, in order to obtain the desired char yields and for simulation of the pyrolysis process, it is important to understand the differences between barks and woods and other lignocellulosic materials in addition to selecting a proper thermochemical method for bark-based char production. In this state-of-the-art review, after analyzing the main char production methods, barks were characterized for their chemical composition and compared with other important lignocellulosic materials. Following these steps, previous bark-based char production studies were analyzed, and different barks and process types were evaluated for the first time to guide future char production process designs based on bark feedstock. The dry and wet pyrolysis and gasification results of barks revealed that application of different particle sizes, heating rates, and solid residence times resulted in highly variable char yields between the temperature range of 220 °C and 600 °C. Bark-based char production should be primarily performed via a slow pyrolysis route, considering the superior surface properties of slow pyrolysis chars.

show abstract

“…The third feedstock, provided by KIT and designated KIT-SP, was produced using STYX screw pyrolysis of bark-free beech wood pellets. Details on the STYX screw pyrolysis system can be found elsewhere; briefly, the wood pellets were fed via hopper to an integrated pyrolysis reactor with a screw mechanism to drive material through the reactor, product gasses are removed at various points along the integrated reactor and sent to a condenser train for sample collection, filters in the reactor prevent solids from being entrained in the gas flows, and all solids are removed at the end to the of the reactor at the screw outlet [10,28,29].…”

Section: Feedstock Sourcesmentioning

confidence: 99%

Cleanup and Conversion of Biomass Liquefaction Aqueous Phase to C3–C5 Olefins over ZnxZryOz Catalyst

et al. 2019

Self Cite

View full text Add to dashboard Cite

The viability of using a ZnxZryOz mixed oxide catalyst for the direct production of C4 olefins from the aqueous phase derived from three different bio-oils was explored. The aqueous phases derived from (i) hydrothermal liquefaction of corn stover, (ii) fluidized bed fast pyrolysis of horse litter, and (iii) screw pyrolysis of wood pellets were evaluated as feedstocks. While exact compositions vary, the primary constituents for each feedstock are acetic acid and propionic acid. Continuous processing, based on liquid–liquid extraction, for the cleanup of the inorganic contaminants contained in the aqueous phase was also demonstrated. Complete conversion of the carboxylic acids was achieved over ZnxZryOz catalyst for all the feedstocks investigated. The main reaction products from each of the feedstocks include isobutene (>30% selectivity) and CO2 (>23% selectivity). Activity loss from coking was also observed, thereby rendering deactivation of the ZnxZryOz catalyst, however, complete recovery of catalyst activity was observed following regeneration. Finally, the presence of H2 in the feed was found to facilitate hydrogenation of intermediate acetone, thereby increasing propene production and, consequently, decreasing isobutene production.

show abstract

Screw pyrolysis with integrated sequential hot gas filtration

Cited by 49 publications

References 20 publications

Chemical Recycling of Mixed Plastic Wastes by Pyrolysis – Pilot Scale Investigations

Chemical Recycling of Mixed Plastic Wastes by Pyrolysis – Pilot Scale Investigations

State-of-the-Art Char Production with a Focus on Bark Feedstocks: Processes, Design, and Applications

Cleanup and Conversion of Biomass Liquefaction Aqueous Phase to C3–C5 Olefins over ZnxZryOz Catalyst

Contact Info

Product

Resources

About