1. School of Chemical Engineering, Northwest University, Xi’an 710069, China 2. Chemical Engineering Research Center of the Ministry of Education (MOE) for Advanced Use Technology of Shanbei Energy, Xi’an 710069, China 3. Shaanxi Research Center of Engineering Technology for Clean Coal Conversion, Xi’an 710069, China 4. Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi, Xi’an 710069, China 5. International Scientific and Technological Cooperation Base of the Ministry of Science and Technology (MOST) for Clean Utilization of Hydrocarbon Resources, Xi’an 710069, China 6. Longdong University, Qingyang 745000, China
China is the largest producer and consumer of HFC-134a (1,1,1,2-tetrafluoroethane) in the world. Coal-based route is mainly adopted to produce HFC-134a, which suffers from large waste and CO2 emissions. Natural gas is a low-carbon and clean energy resource, and no research has been found on the environment and economy of producing HFC-134a from natural gas. In this study, CML 2001 method was used to carry out the life cycle assessment of natural gas (partial oxidation)-based and natural gas (plasma cracking)-based routes (abbreviated as gas(O)-based and gas(P)-based routes, respectively), and their environmental performances were compared with coal-based and oil-based routes. Meanwhile, considering that China is vigorously promoting the transformation of energy structure, and the application of electric heating equipment to replace fossil-based heating equipment in industrial field, which has a great impact on the environmental performance of the production processes, the authors conducted a scenario analysis. The results showed that the gas(O)-based route had the most favourable environmental benefits. However, the gas(P)-based route had the highest potential for reducing environmental burdens, and its environmental benefit was the most favourable in scenario 2050. Additionally, the economic performance of the gas(P)-based route was significantly better than that of gas(O)-based and coal-based routes.
. [J]. Frontiers of Chemical Science and Engineering, 2022, 16(12): 1713-1725.
Suisui Zhang, Gang Li, Boyang Bai, Luyao Qiang, Xiaoxun Ma, Jingying Li. Life cycle assessment and economic analysis of HFC-134a production from natural gas compared with oil-based and coal-based production. Front. Chem. Sci. Eng., 2022, 16(12): 1713-1725.
Economic value allocation,acetylene 65.2%,syngas 34.8%
Mass allocation,trichloroethylene 73.3%, tetrachloroethylene 2.7%,31% hydrochloric acid 24.0%
Economic value allocation,HFC-134a 95.1%,HFC-143a 0.5%,31% hydrochloric acid 4.4%
Gas(P)-based route
Economic value allocation,acetylene 75.3%,H2 24.7%
Coal-based route
–
Mass allocation,trichloroethylene 73.8%,tetrachloroethylene 2.2%,hydrogen chloride 20.1%,high-boiling product 2.4%,low-boiling product were 1.5%
Oil-based route
–
Mass allocation,trichloroethylene 76.6%,tetrachloroethylene 12.5%,hydrogen chloride 10.9%
Category
2025
2035
2050
Power generation
Proportion
Power generation
Proportion
Power generation
Proportion
Coal
4515.5
48.9%
3045.8
26.0%
815.5
5.7%
Hydro
1483.2
16%
1915.7
16.4%
2248.4
15.7%
Wind
1019.3
11%
2413.3
20.6%
4357.8
30.5%
Nuclear
511.6
5.5%
872.3
7.4%
1228.8
8.6%
Natural gas
589.2
6.4%
605.5
5.2%
486.3
3.4%
Solar photovoltaic
853.3
9.2%
2342.5
20.0%
4305.7
30.1%
Solar thermal
30.0
0.3%
130.5
1.1%
352.9
2.5%
Biomass and others
253.9
2.7%
388.5
3.3%
503.5
3.5%
Total
9256.0
100%
11714.1
100%
14298.9
100%
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