Orientations for treatment and deep processing of Ca Voi Xanh gas
Abstract
Ca Voi Xanh gas field is located about 100km off the coast of the central region of Vietnam. This is the biggest gas field in Vietnam with its reserves of 150 billion m3 of natural gas. However, gas from Ca Voi Xanh field has high contents of impurities, namely H2S, CO2 and N2. Orientations for treatment and deep processing of Ca Voi Xanh gas are presented, including membrane separation of CO2 and/or N2; and processing of Ca Voi Xanh gas without CO2 and/or N2 removal to produce (i) syngas for methanol feed via combined reforming technology and/or (ii) ammonia for fertilizer via Haber process. Recovered CO2 can be considered as a potential carbon supply to methanol and DME production if a sustainable and reasonable source of hydrogen is supplied. Development of advanced materials and catalysts for efficient processing of Ca Voi Xanh gas is discussed. It is highly expected that zeolite-based membrane would offer a techno-economically good approach of CO2 and/or N2 removal from a mixture of CH4, CO2, and/or N2, and that nano-Ni-based catalyst brings a high conversion of methane (> 90%) towards lower temperature (550oC) in comparison with current industrial conditions for methane reforming.
References
2. VPI. Study on the ability to integrate Ca Voi Xanh gas
into Dung Quat Refinery for fuel use, hydrogen production,
and petrochemical production. 2018.
3. Richard W.Baker, Kaaeid Lokhandwala. Natural
gas processing with membranes: An overview. Industrial
Engineering Chemistry Research. 2008; 47(7): p. 2109 - 2121.
4. Chiyoda Corporation, Mitsubishi Chemical
Corporation. Novel CO2 separation technology using MSM-1
zeolite membrane. JOGMEC Techno Forum. 27 November,
2014.
5. Enrico Catizzone, Giuseppe Bonura, Massimo
Migliori, Francesco Frusteri, Girolamo Giordano. CO2
recycling to dimethyl ether: State-of-the-art and perspectives.
Molecules. 2018; 23(1).
6. Monica Dan, Maria Mihet, Alexandru R.Biris,
Petru Marginean, Valer Almasan, George Borodi, Fumiya
Watanabe, Alexandru S.Biris, Mihaela D.Lazar. Supported
nickel catalysts for low temperature methane steam
reforming: Comparison between metal additives and
support modification. Reaction Kinetics, Mechanisms and
Catalysis. 2012; 105(1): p. 173 - 193.
7. Daeil Park, Dong Ju Moon, Taegyu Kim. Steam-CO2
reforming of methane on Ni/γ-Al2O3-deposited metallic foam
catalyst for GTL-FPSO process. Fuel Processing Technology.
2013; 112: p. 28 - 34.
8. Kee Young Koo, Hyun Ji Eom, Un Ho Jung, Wang
Lai Yoon. Ni nanosheet-coated monolith catalyst with high
performance for hydrogen production via natural gas steam
reforming. 2016; 525: p. 103 - 109.
9. VPI. Study on the ability to apply membrane reactor
and new catalyst to enhance the methanol yield during CO2
hydrogenation. 2014.
10. GreenID. Analysis of future generation capacity
scenarios for Vietnam. 2017.
Figure 4. Methanol yield from direct conversion of CO2 to methanol over various catalysts
(5 bar, 250°C, GHSV = 36,000h-1) [9].
1. The Author assigns all copyright in and to the article (the Work) to the Petrovietnam Journal, including the right to publish, republish, transmit, sell and distribute the Work in whole or in part in electronic and print editions of the Journal, in all media of expression now known or later developed.
2. By this assignment of copyright to the Petrovietnam Journal, reproduction, posting, transmission, distribution or other use of the Work in whole or in part in any medium by the Author requires a full citation to the Journal, suitable in form and content as follows: title of article, authors’ names, journal title, volume, issue, year, copyright owner as specified in the Journal, DOI number. Links to the final article published on the website of the Journal are encouraged.
