Method for accounting for global cement industry co2 emissions on the level of cement plants

Abstract

A kind of global cement industry carbon dioxide emission accounting method based on cement plant level, comprising the following steps: basic data acquisition, including collecting cement plant data and cement industry data;Utilize the means of scale reduction, match the cement production line of each cement plant cement capacity data and the cement industry data, account for the annual activity level data of each cement plant;Using emission factor method, using carbon emission factor data and annual activity level data of cement plant, obtain global cement plant carbon dioxide emission data based on cement production line, high precision.This method solves the problem of incomplete production process information in carbon emission assessment, improves the spatial accuracy of cement industry carbon emission accounting data, effectively reduces the uncertainty of accounting result, improves the spatial accuracy of cement industry carbon dioxide emission accounting.

Description

Technical Field

[0001] This invention relates to a carbon emission accounting method, and more particularly to a carbon dioxide emission accounting method based on the cement plant level. Background Technology

[0002] The cement industry is one of the world's most energy- and carbon-intensive sectors, playing a crucial role in the energy economy and climate change. Currently, there are significant differences in cement production processes, industry development stages, and corresponding environmental impacts across different regions globally. Cement consumption in China and other developed countries appears to be stabilizing, while emerging economies are expected to experience rapid growth in the construction sector, becoming major emitters. Achieving low-carbon development in the cement industry of emerging economies is fundamental to global emissions reduction. Therefore, there is an urgent need for plant-level CO2 emissions accounting methods based on regional characteristics and the age structure of cement plants. However, current CO2 emissions calculation methods in the cement industry are mostly limited to the national level or a few hypothetical plants with specific processes. Given the spatial differences in cement production processes and development stages worldwide, such CO2 emissions accounting methods introduce significant uncertainty, hindering their widespread adoption and insufficient support for precise global carbon reduction efforts in the cement industry. Summary of the Invention

[0003] The purpose of this invention is to provide a carbon dioxide emission assessment method based on cement plants, in order to address the shortcomings of existing global cement plant carbon dioxide emission accounting methods.

[0004] This invention provides a method for calculating carbon dioxide emissions from the global cement industry at the cement plant level, characterized by the following steps:

[0005] Step S01: Basic data collection, including collecting cement plant data and cement industry data; among which, cement plant data includes cement production capacity data of cement production lines in cement plants around the world, as well as geographical location data of cement plants; cement industry data includes annual output data of cement industry in various countries around the world, clinker-cement conversion coefficient of cement industry, energy structure data of cement industry, and carbon emission factor data.

[0006] Step S02: Using scaling down methods, match the cement production capacity data of each cement production line in the cement plant with the cement industry data, and calculate the annual activity level data of each cement plant.

[0007] Step S03: Using the emission factor method, the carbon emission factor data obtained in step S01 and the annual activity level data of cement plants obtained in step S02 are used to obtain high-precision global cement plant carbon dioxide emission data based on cement production lines.

[0008] The carbon emission factor data includes carbon emission factors from clinker production in different countries and carbon emission factors from fuels.

[0009] Further, in step S01, after acquiring the cement plant data and cement industry data, the data is preprocessed according to the following steps:

[0010] (1) Remove duplicate items;

[0011] (2) The obtained cement plant data is sorted and organized according to the cement production line.

[0012] Specifically, the annual activity level data of the cement plant includes the clinker output of each cement production line and the fuel consumption of each kiln in the cement plant.

[0013] Furthermore, in step S02, using the annual output data of the cement industry as a benchmark, and allocating the output by country or region according to the capacity of each production unit of the cement plant, the cement output of each cement production line in all cement plants worldwide can be obtained:

[0014] A i,t =A c,t ×C i,t / ∑C i,t

[0015] Where A represents the cement output of each production line in each cement plant; C represents the specific capacity of the cement processing production line; i, c, and t represent the cement plant, country, and year of calculation, respectively.

[0016] Based on the clinker-cement conversion coefficients for the global cement industry by country, the annual clinker production of global cement plants can be further obtained:

[0017] A clk,i,t =A i,t ×R c,t

[0018] Among them, A clk R represents the clinker output of each production line in each cement plant; R represents the clinker-cement conversion coefficient in the cement industry; i, c, and t represent the cement plant, country, and year of calculation, respectively.

[0019] Furthermore, in step S03, the carbon dioxide emissions from the cement plant include two parts: emissions from the cement production process and emissions from fuel combustion. Specifically:

[0020]

[0021] The carbon emissions from the cement production process at each cement plant are calculated as follows:

[0022] E CO2,i,p,t=A clk,i,p,t ×EF clk,c

[0023] Among them, E CO2,i,p,t Represents CO2 emissions from the cement production process; A clk,i,p,t EF represents the clinker output of each cement production line. clk,c The non-energy-related CO2 emission factor (t CO2 / t clinker) represents the specific country of cement production; i, p, and t represent the type of cement plant, cement production line, and calculation year, respectively.

[0024] The carbon emissions from fuel combustion in cement production lines at each cement plant are calculated as follows:

[0025]

[0026] Among them, E CO2,i,p,t Represents CO2 emissions from the cement production process; A clk,i,p,t EI represents the clinker output of each cement production line. k K represents the specific energy intensity (J / kg clinker) of a cement production kiln; S j,c EF represents the proportion of fuel j consumed in cement production in country c. fuel,j,c The value represents the energy-related CO2 emission factor (t CO2 / t fuel consumption) of cement production in a specific country (c); i, j, p, and t represent the cement plant, fuel type, cement production line type, and calculation year, respectively.

[0027] This invention presents a global cement industry carbon dioxide emission assessment method based on the cement plant level. It utilizes micro-level data on cement plant operating status, cement capacity, cement production line type (combined, clinker, raw meal grinding), cement type (gray or white), and geographical location, as well as macro-level cement industry output data, to form a multi-scale, refined global cement plant carbon emission database. This database enables the extraction of global cement plant carbon dioxide emission data based on production process flow and age structure. Introducing this plant-level global cement plant carbon emission database into the field of carbon emission accounting solves the problem of incomplete production process information in carbon emission assessment, improves the spatial accuracy of cement industry carbon emission accounting data, effectively reduces the uncertainty of accounting results, and enhances the spatial accuracy of cement industry carbon dioxide emission accounting. This provides data support for national prediction of potential carbon emissions from the cement industry, achieving precise emission reduction and carbon peaking and carbon neutrality in the cement industry. Attached Figure Description

[0028] To gain a more complete understanding of the invention, reference will now be made to the following description taken in conjunction with the accompanying drawings, wherein:

[0029] Figure 1This is a flowchart of the global cement industry carbon dioxide emission accounting method based on the cement plant level of the present invention. Detailed Implementation

[0030] To clearly illustrate the purpose, technical details, and effective applications of this invention, and to facilitate understanding and implementation by those skilled in the art, a further detailed description will be provided below in conjunction with the embodiments and accompanying drawings. Obviously, the embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0031] This invention provides a method for calculating carbon dioxide emissions from the global cement industry at the cement plant level, comprising the following steps:

[0032] Step S01: Basic data collection, including collecting data from cement plants and the cement industry.

[0033] The cement plant data includes point-source data from cement plants worldwide, primarily consisting of cement production capacity data for each cement production line and geographical location data for cement plants.

[0034] The collection of activity level data for various production units in cement plants was conducted using the CEMNET Global Cement Report (https: / / www.cemnet.com / global-cement-report / ) and the Global Cement Directory (https: / / www.globalcement.com / directory), supplemented by publicly available local databases from major cement-producing countries such as China (CCMENT, https: / / www.ccement.com / ), India (India Mineral Resources Yearbook, https: / / ibm.gov.in / index.php?c=pages&m=index&id=107), and Russia (List of Russian Cement Plants, https: / / заводы.рф / factories / cementnye-zavody). Using these datasets, information was obtained regarding the global cement plant's operational status, cement production capacity, cement production line type (integrated, clinker, raw meal grinding), kiln type (dry, semi-dry, semi-wet, wet, vertical shaft, and new dry kiln), cement type (grey or white), and address information. By utilizing Industryabout data and consulting official websites of cement plants worldwide, we collected information on the start-up and decommissioning times of cement plants globally.

[0035] Taking Chaohu Conch Cement Plant as an example, its operating status is: in operation; decommissioning time: not decommissioned; start of service time: 2016; its cement production line type is raw material grinding, its kiln type is new dry kiln; annual production capacity is: 2 million tons; its address is: No. 269 Changjiang West Road, Chaohu City, Hefei City, Anhui Province, old plant area of ​​Chaohu Cement Plant.

[0036] The geographical location data of the cement plant was collected using OpenStreetMap or Baidu Maps. Based on the obtained address information of the cement plant, accurate geographical location data, such as longitude and latitude, was obtained from the corresponding map websites.

[0037] The cement industry data includes annual production data for cement industries in various countries worldwide, clinker-to-cement conversion coefficients, energy structure data, and carbon emission factor data. For the annual production and capacity data, annual production data for each cement production line in all countries worldwide was obtained using global cement reports published by CEMNET and production reports from major cement-producing countries. The clinker-to-cement conversion coefficient R for each country worldwide was collected using IEA energy consumption data. c For the aforementioned carbon emission factor data, the carbon emission factors EF for clinker production in different countries were collected using the Greenhouse Gas Emission Factor Inventory published by the U.S. Environmental Protection Agency (US EPA). ckl,c Data on the energy structure of the cement industry, specifically the share of different fuels, was collected using the Climate Convention. j,c And carbon emission factor data EF fuel,j,c .

[0038] After obtaining the cement plant data and cement industry data, the data needs to be preprocessed. The preprocessing is performed according to the following steps:

[0039] (1) Remove duplicate items;

[0040] (2) The obtained cement plant data is sorted and organized according to the cement production line for later reference.

[0041] The data collected in the early stage was categorized by cement plant. However, a cement plant may correspond to multiple cement production lines. In this step, the data is collected by cement production line, for example, by clinker grinding, raw meal grinding, etc.

[0042] Step S02: Using a scaling-down method, match the cement production capacity data of each cement production line in the cement plant with the cement industry data to calculate the annual activity level data of each cement plant.

[0043] The annual activity level data for cement plants includes industrial process activity level data and fuel combustion activity level data. Specifically, the industrial process activity level data is the clinker output of each cement production line, and the fuel combustion activity level data is the fuel consumption of each kiln in the cement plant.

[0044] Using the annual output data of the cement industry as a benchmark, and using the geographical location data of each cement plant obtained in step S01, the cement output of each cement production line of each cement plant is allocated according to the capacity of each production unit of the cement plant, with each country or region as the unit. The specific calculation method is shown in formula (1), which can obtain the cement output of each cement production line of each cement plant in the world.

[0045] A i,t =A c,t ×C i,t / ∑C i,t (1)

[0046] Where A represents the cement output of each production line in each cement plant; C represents the specific capacity of the cement processing production line; i, c, and t represent the cement plant, country, and year of calculation, respectively.

[0047] Based on the clinker-cement conversion coefficient of the global cement industry by country, the annual clinker output of global cement plants is further obtained. The specific calculation method is shown in formula (2).

[0048] A clk,i,t =A i,t ×R c,t (2)

[0049] Among them, A clk R represents the clinker output of each production line in each cement plant; R represents the clinker-cement conversion coefficient in the cement industry; i, c, and t represent the cement plant, country, and year of calculation, respectively.

[0050] Step S03: Using the emission factor method, the carbon emission factor data of cement clinker production in different countries and the carbon emission factor data of fuel combustion by fuel type obtained in Step S01, as well as the annual activity level data of cement plants obtained in Step S02, are used to obtain high-precision global cement plant carbon dioxide emission data based on cement production lines.

[0051] Carbon dioxide emissions from cement plants consist of two parts: emissions from cement production and emissions from fuel combustion. Specifically:

[0052]

[0053] The carbon emissions from the cement production process at each cement plant are calculated as follows:

[0054]

[0055] Among them, E CO2,i,p,t Represents CO2 emissions from the cement production process; A clk,i,p,t EF represents the clinker output of each cement production line. clk,c The non-energy-related CO2 emission factor (t CO2 / t clinker) represents the specific country of cement production; i, p, and t represent the type of cement plant, cement production line, and calculation year, respectively.

[0056] The carbon emissions from fuel combustion in cement production lines at each cement plant are calculated as follows:

[0057]

[0058] Among them, E CO2,i,p,t Represents CO2 emissions from the cement production process; A clk,i,p,t EI represents the clinker output of each cement production line. k K represents the specific energy intensity (J / kg clinker) of a cement production kiln; S j,c EF represents the proportion of fuel j consumed in cement production in country c. fuel,j,c The value represents the energy-related CO2 emission factor (t CO2 / t fuel consumption) of cement production in a specific country (c); i, j, p, and t represent the cement plant, fuel type, cement production line type, and calculation year, respectively.

[0059] Following the steps outlined above, we can calculate global cement plant carbon dioxide emissions based on cement production lines, kiln types, and with high precision and comprehensive coverage. Furthermore, based on global cement plant carbon dioxide emissions, we can extract characteristics such as emission intensity, spatial distribution, and age structure at different spatial scales (national, regional, and global), clarify the relationship between cement plant operating characteristics and their carbon dioxide emissions, and provide detailed information on global cement production capacity and related carbon dioxide emissions accurate to the plant level.

[0060] The carbon dioxide emissions at the factory level obtained using the calculation method described in this invention can be verified using nationally published data on energy consumption and emissions. Verification from multiple perspectives demonstrates that the carbon dioxide emissions calculated using this invention have high accuracy.

Claims

1. A method for accounting for carbon dioxide emissions of the global cement industry on the level of a cement plant, characterized in that, Includes the following steps: Step S01: Basic data collection, including collecting cement plant data and cement industry data; among which, cement plant data includes cement production capacity data of cement production lines in cement plants around the world, as well as geographical location data of cement plants; cement industry data includes annual output data of cement industry in various countries around the world, clinker-cement conversion coefficient of cement industry, energy structure data of cement industry, and carbon emission factor data. Step S02: Using scaling down methods, match the cement production capacity data of each cement production line in the cement plant with the cement industry data, and calculate the annual activity level data of each cement plant. Step S03: Using the emission factor method, the carbon emission factor data obtained in step S01 and the annual activity level data of cement plants obtained in step S02 are used to obtain high-precision global cement plant carbon dioxide emission data based on cement production lines. Carbon dioxide emissions from cement plants include two parts: emissions from cement production and emissions from fuel combustion. Specifically: ； The carbon emissions from the cement production process at each cement plant are calculated as follows: ； in, E CO2,i,p,t This represents the CO2 emissions from the cement production process. A clk,i,p,t This represents the clinker output of each cement production line; EF clk,c Representative cement producing countries c Specific non-energy-related CO2 emission factors, t CO2 / t clinker; i , p , t These represent the type of cement plant, cement production line, and the year of calculation, respectively. The carbon emissions from fuel combustion in cement production lines at each cement plant are calculated as follows: ； in, E CO2,i,p,t This represents the CO2 emissions from the cement production process. A clk,i,p,t This represents the clinker output of each cement production line; EI k Representative cement production kiln k Specific energy intensity, J / kg clinker; S j,c Represents fuel j In the country c The proportion consumed in cement production, EF fuel,j,c Representing cement production in the country c Specific energy-related CO2 emission factors, t CO2 / t fuel consumption; i , j , p , t These represent the cement plant, fuel type, cement production line type, and calculation year, respectively.

2. The method of claim 1, wherein, The carbon emission factor data includes carbon emission factors from clinker production in different countries and carbon emission factors from fuels.

3. The method of claim 1, wherein, In step S01, after obtaining the cement plant data and cement industry data, the data is preprocessed according to the following steps: (1) Remove duplicate items; (2) The obtained cement plant data is sorted and organized according to the cement production line.

4. The method of claim 1, wherein, The specific annual activity level data for the cement plant includes the clinker output of each cement production line and the fuel consumption of each kiln in the cement plant.

5. The method of claim 1, wherein, In step S02, using the annual output data of the cement industry as a benchmark, and allocating the output by country or region according to the capacity of each production unit of the cement plant, the cement output of each cement production line in each cement plant worldwide can be obtained: ； in, A This represents the cement output of each production line in each cement plant. C This represents the specific production capacity of a cement processing production line. i、 c, t These represent the cement plant, the country, and the year of calculation, respectively.

6. The method of claim 5, wherein, Based on the clinker-cement conversion coefficients for the global cement industry by country, the annual clinker production of global cement plants can be further obtained: ； wherein, A clk Cement clinker production per production line of each cement plant; R Cement industry clinker-cement conversion factor; i, c, t Cement plant, country, calculation year, respectively.

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