Each one can compress 700,000 cubic meters of air to 2.4 bar every hour, which is the highest flow rate of an axial-flow compressor in the world. The plant will start up in 2013 and produce propylene as the source material for the plastic polypropylene.
In a first, the compressor train for this plant will be implemented as an axial-flow compressor driven by gas turbines. The plant is the first propane dehydrogenation project (PDH) in China and has a capacity of 600,000 metric tons propylene per year. It will be operated by the Chinese Tianjin Chemical Industry Group Co., a chemicals company specializing in plastics processing.
There is a growing demand for plastics and thus for propylene in China, as in all of Asia. With the construction of PDH plants, China is meeting this demand and at the same time developing an industry for processing natural gas. Up to now, propylene has been obtained mostly along with ethylene as a result of petroleum cracking in refineries. But since the demand for propylene is increasing faster than that for ethylene, dedicated production of propylene is becoming increasingly important.
The process with the highest selectivity for propylene (over 85 percent) is based on the Catofin technology of U.S. company CB&I Lummus. In this technique, propylene is manufactured in a catalytic process by dehydrogenating propane — i.e. removing some of its hydrogen. The propane gas usually comes from natural gas.
In the Catofin process, the catalyst must be repeatedly heated up and regenerated with compressed, heated air in alternation with the dehydrogenation reaction. In the new plant, this air is supplied by two Siemens compressor trains. Until now, axial-flow compressors of this sort have only been used in blast furnaces or refinery processes. In the project in Bohai, China, they are now being used for the first time in a propane dehydrogenation plant in the petrol industry.
Another novelty is the combination of an axial-flow compressor with a gas turbine. Gas turbines are a suitable drive system at the Chinese plant, because they can be run on both propane gas from the plant and natural gas from a pipeline. Gas turbines and axial-flow compressors both have high efficiency rates. The combination of the two systems is therefore also very efficient.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
"We're hoping for up to 600 kilometers per hour"
15.06.2018 | Technische Universität München
Flow probes from the 3D printer
25.05.2018 | Technische Universität München
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
22.06.2018 | Materials Sciences
22.06.2018 | Earth Sciences
22.06.2018 | Life Sciences