CN116168769A - Method for calculating carbon footprint of waste plastic chemical method recovery oil production process - Google Patents
Method for calculating carbon footprint of waste plastic chemical method recovery oil production process Download PDFInfo
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- 239000004033 plastic Substances 0.000 title claims abstract description 57
- 229920003023 plastic Polymers 0.000 title claims abstract description 57
- 239000002699 waste material Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 40
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 36
- 239000000126 substance Substances 0.000 title claims abstract description 28
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000003921 oil Substances 0.000 claims abstract description 23
- 238000000197 pyrolysis Methods 0.000 claims abstract description 22
- 239000000295 fuel oil Substances 0.000 claims abstract description 21
- 238000009833 condensation Methods 0.000 claims abstract description 10
- 230000005494 condensation Effects 0.000 claims abstract description 10
- 238000007670 refining Methods 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 238000011156 evaluation Methods 0.000 claims abstract description 7
- 238000004458 analytical method Methods 0.000 claims abstract description 5
- 230000006872 improvement Effects 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 7
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- 238000004364 calculation method Methods 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 claims description 4
- 231100000719 pollutant Toxicity 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000004064 recycling Methods 0.000 description 16
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- -1 Polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000013502 plastic waste Substances 0.000 description 1
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- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a method for calculating carbon footprint of an oil production process recovered by a waste plastic chemical method, which utilizes a life cycle evaluation method to evaluate carbon footprint of waste plastic recovered by the chemical method under different time scales, and firstly determines life cycle boundary of the waste plastic recovered by the chemical method; then collecting waste plastic pyrolysis, oil separation, condensation, rectification, refining and original fuel oil production data, and performing inventory analysis; then, performing carbon footprint accounting by utilizing openLCA software and an IPCC2013GWP 100a (20 a) method; and finally, analyzing the result. The invention quantifies the carbon footprint of the waste plastic recovered by the chemical method from the full life cycle, can more systematically and comprehensively know the superiority and inferiority of the waste plastic recovery route by the chemical method, and provides a reference for policy makers to select cleaner waste plastic recovery routes. In addition, the contribution degree of six stages of the life cycle of the recovered waste plastics to carbon footprint emission is analyzed by a chemical method, and improvement measures are provided.
Description
Technical Field
The invention belongs to the technical field of life cycle evaluation, and relates to a method for calculating carbon footprint of an oil production process recovered by a waste plastic chemical method.
Background
The environmental management of waste plastics is a key link of the full-chain treatment of plastic pollution, and accelerating the promotion of plastic waste standard recycling and disposal is an important measure. Unlike traditional utilization-disposal linear methods, the main principle of recycling economy is waste prevention, reuse, recycling and recovery, an important waste management means other than prohibition.
The recycling mode of waste plastics can be divided into physical recycling and chemical recycling. The physical regeneration has wide application range and high maturity, but is limited by the quality and regeneration times of waste plastics, and has lower applicability to mixed and low-value waste plastics. With the technical progress, the chemical regeneration suitable for low-value waste plastics has initially provided industrialized conditions in China, and a large-scale device is built, so that the chemical regeneration can be effectively supplemented for physical regeneration.
Chemical pyrolysis is to convert macromolecular organic matters into gaseous, liquid and solid components with smaller relative molecular mass under the combined action of decomposition and condensation under the conditions of no oxygen or oxygen deficiency and a certain temperature according to the thermal instability of organic matters such as plastics and the like, so that the resource recycling of wastes is realized. The pyrolysis technology has low treatment cost, high recycling degree and good environmental benefit, and becomes a mainstream harmless treatment and recycling technology of organic wastes at home and abroad. Pyrolysis is one of the chemical recovery techniques that have reached commercial maturity. While the current research mainly focuses on the technical method for recycling waste plastics, few researches consider the carbon footprint of chemical recycling of waste plastics from the life cycle point of view.
Disclosure of Invention
In order to solve the problems, the invention provides a method for calculating the carbon footprint of the oil production process recovered by the chemical method of waste plastics, which can comprehensively evaluate the carbon footprint of the waste plastics recovered by the chemical method.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a method for calculating carbon footprint of oil production process recovered by waste plastic chemical method comprises the following steps:
(1) Determination of targets and ranges: the boundary comprises all life cycle stages including the generation of regenerated fuel oil and the replacement of original fuel oil by the regenerated fuel oil through pyrolysis of waste plastics, particularly six stages including pyrolysis, oil separation, condensation, rectification, refining and replacement of waste plastics, and the resource, energy, material investment and pollutant emission of each stage in the boundary of the system are considered; the functional unit is defined as the recovery of 1 ton of waste plastic;
(2) And (3) list analysis: collecting waste plastic pyrolysis, oil separation, condensation, rectification and refining process data and raw fuel oil production data; the data includes resources, energy consumption, and pollutant emissions;
(3) The influence evaluation method comprises the following steps: according to the list data, performing carbon footprint calculation through openLCA software and Ecoinvent3.7 database modeling; the carbon footprint calculation formula is as follows:
E Carbonfootprint ＝E p +E d +E c +E di +E r -E v
wherein E is Carbon footprint Recovery of carbon footprint per kgCO for waste plastics chemistry 2 e；E p 、E d 、E c 、E di 、E r The carbon footprint of the waste plastic pyrolysis, oil separation, condensation, rectification and refining process is respectively given as a unit kgCO 2 e；E v Production of carbon footprint per kg CO for raw fuel oil 2 e；
Calculating the carbon footprints of each life cycle stage of the recycled regenerated fuel oil instead of the original fuel oil by using the IPCC2013GWP 100a and the IPCC2013GWP 20 a;
(4) Analysis of results: and (3) evaluating the life cycle evaluation result, identifying the main source of the carbon footprint of the waste plastic recovered by a chemical method, analyzing whether the recovery activity has an emission reduction effect by replacing the original plastic, and providing corresponding improvement measures.
The invention has the beneficial effects that:
(1) The carbon footprint of the waste plastic recovery by the chemical method under different time scales is quantized from the full life cycle, the advantages and disadvantages of the waste plastic recovery route by the chemical method can be comprehensively recognized more systematically, and a reference basis is provided for policy makers to select cleaner waste plastic recovery routes.
(2) And analyzing the contribution degree of different stages of the life cycle of the recovered waste plastics to the selected environmental impact index respectively by a chemical method, and providing improvement measures.
Drawings
FIG. 1 is a schematic diagram of life cycle boundaries of chemically recycling waste plastics.
Detailed Description
The specific embodiments of the present invention will be further described with reference to the accompanying drawings.
The waste plastics are pyrolyzed to generate regenerated fuel oil and the regenerated fuel oil replaces original fuel oil, the research range of the route consists of pyrolysis, oil separation, condensation, rectification, refining and replacement, and the raw materials and the process transportation are assumed to be negligible. The life cycle boundaries of the chemically recovered waste plastic are shown in fig. 1.
This example obtained data from 10500 tons of waste plastics pyrolysis project from Yunyun floating city, guangdong, the project treatment waste plastics type being Polyethylene (PE) and polypropylene (PP) blends, excluding PVC components; the waste plastics are not cleaned before being recovered. The pyrolysis gas yield of the project is 10%, the slag yield is 20%, the oil yield is calculated according to 70%, the rectification oil yield is 85%, the gas yield is 5%, the rectification residual liquid (slag) is 10%, the rectification residual liquid returns to the pyrolysis furnace to produce 70%, the gas yield is 10%, and 20% enters the slag, and finally the pyrolysis oil is 6655 tons/year, wherein the pyrolysis oil comprises 525 tons/year of heavy component oil and 6130 tons/year of fuel oil. Raw materials, energy consumption, direct emission and other raw data in the process of recycling waste plastics by a chemical method are derived from typical waste plastics pyrolysis factory data in China. Background data such as electricity, water, catalysts (soda ash, alumina, magnesia), additives (alumina, silica solid sinter), virgin heavy and fuel oil production, waste disposal, etc. all were from econnvent 3.7 databases.
IPCC2013GWP 100a (20 a) is selected as an influence evaluation method of the embodiment, and a full life cycle carbon footprint emission result of the chemical method recycled waste plastics is obtained through openLCA software modeling. The results show that 634kg of pyrolysis oil can be obtained per 1 ton of waste plastics recovered, and 469 (478) kgCO can be avoided by replacing virgin oil with regenerated pyrolysis oil 2 e discharging, wherein the carbon footprints of the pyrolysis, oil separation, condensation, rectification, refining and replacement of six stages are 119.2 (131.4), 1.4 (1.8), 68 (-77), 53.5 (58), 11.5 (14.3), 586.5 (-606) kgCO respectively 2 e。
In the embodiment, the main source of the carbon footprint in the recycling process is identified through quantifying the life cycle carbon footprint of the waste plastic recycled by a chemical method, and whether the recycling activity has an emission reduction effect by replacing the original plastic is analyzed. The system comprehensively recognizes the superiority and inferiority of the chemical method recycling waste plastic route, analyzes contribution degrees of six stages of the whole life cycle to the whole carbon footprint respectively, and provides corresponding improvement measures.
Claims (1)
1. The method for calculating the carbon footprint of the oil production process recovered by the waste plastic chemical method is characterized by comprising the following steps:
(1) Determination of targets and ranges: the boundary comprises all life cycle stages including the generation of regenerated fuel oil and the replacement of original fuel oil by the regenerated fuel oil through pyrolysis of waste plastics, particularly six stages including pyrolysis, oil separation, condensation, rectification, refining and replacement of waste plastics, and the resource, energy, material investment and pollutant emission of each stage in the boundary of the system are considered; the functional unit is defined as the recovery of 1 ton of waste plastic;
(2) And (3) list analysis: collecting waste plastic pyrolysis, oil separation, condensation, rectification and refining process data and raw fuel oil production data; the data includes resources, energy consumption, and pollutant emissions;
(3) The influence evaluation method comprises the following steps: according to the list data, performing carbon footprint calculation through openLCA software and Ecoinvent3.7 database modeling; the carbon footprint calculation formula is as follows:
E Carbon footprint ＝E p +E d +E c +E di +E r -E v
wherein E is Carbon footprint Recovery of carbon footprint per kgCO for waste plastics chemistry 2 e；E p 、E d 、E c 、E di 、E r The carbon footprint of the waste plastic pyrolysis, oil separation, condensation, rectification and refining process is respectively given as a unit kgCO 2 e；E v Production of carbon footprint per kg CO for raw fuel oil 2 e；
Calculating the carbon footprint of each life cycle stage of the recycled regenerated fuel oil instead of the original fuel oil by using the IPCC2013GWP 100a and the IPCC2013GWP 20 a;
(4) Analysis of results: and (3) evaluating the life cycle evaluation result, identifying the main source of the carbon footprint of the waste plastic recovered by a chemical method, analyzing whether the recovery activity has an emission reduction effect by replacing the original plastic, and providing corresponding improvement measures.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117077983A (en) * | 2023-10-16 | 2023-11-17 | 南通瑞童塑业科技有限公司 | Plastic product remanufacturing processing method and system based on Internet of things |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117077983A (en) * | 2023-10-16 | 2023-11-17 | 南通瑞童塑业科技有限公司 | Plastic product remanufacturing processing method and system based on Internet of things |
| CN117077983B (en) * | 2023-10-16 | 2023-12-22 | 南通瑞童塑业科技有限公司 | Plastic product remanufacturing processing method and system based on Internet of things |
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