Pyrolysis of scrap printed circuit board plastic particles in a fluidized bed

Guo, Qingjie; Yue, Xuehai; Wang, Minghua; Liu, Yongzhuo

doi:10.1016/j.powtec.2009.12.011

Cited by 90 publications

(38 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Pyrolysis is one of the common techniques used for degradation of plastics to oils, gases, tar, etc., and easy separation of metallic materials and glass fibers. It is carried out in the absence of oxygen or in the presence of some inert gases at a temperature range of 400 to 700 ⁰ C. A significant amount of work on pyrolysis of waste PCBs has been reported (Chien et al, 2000a;Guo et al, 2010;Hall and Williams, 2007a;Quan et al, 2009) including the micro-wave induced pyrolysis (Sun et al, 2011;Zhang et al, 2010) and vacuum pyrolysis (Long et al, 2010;Zhou and Qiu, 2010). Experimentally, pyrolysis of waste computer PCBs generated approximately 22.7% oil, 4.7% gases and 70% copper-rich residue (Hall and Williams, 2007b).…”

Section: Chemical Processmentioning

confidence: 99%

Waste Printed Circuit Boards recycling: an extensive assessment of current status

Ghosh

Parhi

et al. 2015

Journal of Cleaner Production

494

180

View full text Add to dashboard Cite

Section: Chemical Processmentioning

confidence: 99%

Waste Printed Circuit Boards recycling: an extensive assessment of current status

Ghosh

Parhi

et al. 2015

Journal of Cleaner Production

494

180

View full text Add to dashboard Cite

“…Figure 7a, b shows TG-DTA-DTG curves of WPCBs and solid residues. It is seen that significant weight losses for both WPCBs and solid residues are at temperature ranging 300-380°C, This indicates that pyrolyzing temperature of solid residues is the same as that of the bromine epoxy resins of WPCBs (Guo et al 2010). EDS of Fig.…”

Section: Methodsmentioning

confidence: 79%

A novel approach to separation of waste printed circuit boards using dimethyl sulfoxide

Zhu

Chen

Wang

et al. 2012

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Waste printed circuit boards are complex heterogeneous mixture consisting of organic material, metal and glass fiber, therefore, it is quite difficult for the recovery of valuable materials from waste printed circuit boards. In this study, waste printed circuit boards without electronic components (known as bare boards) are submerged into dimethyl sulfoxide solvent at 170°C using refluxing process. Metallographic microscope shows that waste printed circuit boards produce the delamination after treated with dimethyl sulfoxide solvent for 15 min. When waste printed circuit boards are treated with dimethyl sulfoxide solvent for 30 min, the separation of waste printed circuit boards is complete to obtain metals and glass fibers. Moreover, the used dimethyl sulfoxide solvent is vaporized by the rotary decompression which obtains regenerative dimethyl sulfoxide and solid residues. Comparing two Fourier transform infrared spectroscopies, it is found that the regenerative dimethyl sulfoxide is the same as original dimethyl sulfoxide. Thermal analyses combined with Fourier transform infrared spectroscopy show that the solid residues are bromine epoxy resins. These findings suggest that this innovative technology offers an environmental friendly process with no pollution and high efficiency for separating valuable materials from waste printed circuit boards.

show abstract

“…Proposed pyrolysis processes are flexible and can treat mixtures of plastics such as those obtained from municipal solid wastes [11,12] or mixtures of these with other residual materials such as biomass [13] and plastic materials derived from car recycling [14], electronics and computers [15], construction (such as polymethyl metacrylate [16], and healthcare [17].…”

Section: The Recycling Of Polyolefinsmentioning

confidence: 99%

Pyrolysis of Polyolefins in a Conical Spouted Bed Reactor: A Way to Obtain Valuable Products

Arabiourrutia¹,

Elordi²,

Olazar³

et al. 2017

Pyrolysis

View full text Add to dashboard Cite

The amount of waste plastic increases every single year, which causes a critical environmental issue. Polyolefins (mainly high-and low-density polyethylene and polypropylene) are the most common types of plastics, accounting for 60 wt% of the plastic waste. Pyrolysis, the thermal degradation in an inert atmosphere, is considered to be one of the most appealing technologies for the recycling of plastic materials. The conical spouted bed reactor is suitable for the pyrolysis of plastic waste due to its ability to avoid agglomeration problems that may be caused by the melted plastic. The pyrolysis process may be carried out at different temperatures and with or without the presence of catalysts in the reaction environment in order to streamline product distribution. The resulting products are hydrocarbons: non-condensable gases (C 1 -C 4 ), gasoline fraction, diesel fraction, and waxes. These fractions might be used directly as feed streams for refinery units or as pools to be mixed with other streams from refineries.

show abstract

Pyrolysis of scrap printed circuit board plastic particles in a fluidized bed

Cited by 90 publications

References 13 publications

Waste Printed Circuit Boards recycling: an extensive assessment of current status

Waste Printed Circuit Boards recycling: an extensive assessment of current status

A novel approach to separation of waste printed circuit boards using dimethyl sulfoxide

Pyrolysis of Polyolefins in a Conical Spouted Bed Reactor: A Way to Obtain Valuable Products

Contact Info

Product

Resources

About