A Study on the Water Gas Shift Reaction of RPF Syngas

Seon Ah Roh

doi:10.7844/kirr.2021.30.6.12

All Issue

2021 Vol.30, Issue 6 Preview Page Next Page

Research Paper

A Study on the Water Gas Shift Reaction of RPF Syngas RPF(Refuse plastic fuel) 합성가스의 수성가스 전환 반응 연구

31 December 2021. pp. 12-18

PDF XML

Abstract

The water-gas shift reaction is the subsequent step using steam for hydrogen enrichment and H₂/CO ratio-controlled syngas from gasification. In this study, a water-gas shift reaction was performed using syngas from an RPF gasification system. The water-gas shift using a catalyst was performed in a laboratory-scale tube reactor with a high temperature shift (HTS) and a low temperature shift (LTS). The effects of the reaction temperature, steam/carbon ratio, and flow rate on H₂ production and CO conversion were investigated. The operating temperature was 250-400°C for the HTS system and 190-220°C for the LTS system. Steam/carbon ratios were between 1.5 and 3.5, and the composition of reactant was CO : 40 vol%, H₂ : 25 vol%, and CO₂ : 25 vol%. The CO conversion and H₂ production increased as the reaction temperature and steam/carbon ratio increased. The CO conversion and H₂ production decreased as the flow rate increased due to reduced retention time in the catalyst bed.

Keywords

Syngas

Water gas shift

gasification

Hydrogen

CO conversion

수성가스 전환 반응은 가스화로 생성된 합성 가스에 수소 생산 증가와 H₂/CO 비율 제어를 위해 수증기를 첨가하는 가스화 후속 공정이다. 본 연구에서는 RPF(Refuse plastic fuel) 가스화 시스템의 합성가스를 대상으로 수성가스 전환 반응을 연구하였다. 수성가스 전환 반응은 촉매를 이용하여 high temperature shift(HTS) 와 low temperature shift(LTS) 반응에 대하여 lab scale 관형 반응기를 이용하여 반응 온도, steam/carbon ratio, 유량의 변화가 H₂ 생성과 CO 전환율에 미치는 영향을 조사하였다. 운전 온도는 HTS 시스템이 250-400°C, LTS 시스템이 190-220°C이며 steam/carbon ratio는 1.5-3.5로 변화시켰다. 반응 모의 가스의 농도는 RPF 합성가스의 농도를 기준으로 CO, 40vol%, H₂, 25vol%, CO₂, 25vol%이다. 반응 온도와 steam/carbon ratio가 증가함에 따라 CO 전환율 및 H₂ 생성량이 증가하고, 유량이 증가하면 촉매층의 체류시간 단축으로 CO 전환율과 H₂ 생성량이 감소하였다.

키워드

합성가스

수성가스 전환

가스화

수소

이산화탄소 전환율

References

Geyer, R., Jambeck, J.R., Law, K.L., 2017 : Production, use, and fate of all plastics ever made, Sci. Adv., 3, pp.25- 29. 10.1126/sciadv.170078228776036PMC5517107

Kim, Y., Lee, S., Ahn, J., 2021 : A Brief review on Global Plastic Regulation Trends (in Korean), KOSEE, 30(1), pp.21-25. 10.29189/KAIAJFAI.21.1.1

Borrelle, S. B., Ringma, J., Law, K. L., et al., 2020 : Predicted growth in plastic waste exceeds efforts to mitigate plastic pollution, Sci., 369, pp.1515-1518. 10.1126/science.aba365632943526

Liu, S., Kots, P.A., Vance, B.C., et al., 2021 : Plastic waste to fuels by hydrocracking at mild conditions, Sci. Adv., 7, pp.1-10. 10.1126/sciadv.abf828333883142

Weiland, F., Lundin, L., Celebi, M., et al., 2021 : Aspects of chemical recycling of complex plastic waste via the gasification route, Waste Manag., 126, pp.65-77. 10.1016/j.wasman.2021.02.05433740713

Chun, Y.N., Lim, M.S., Jo, D.Y., 2015 : Characteristics of Gasification for a Refused Plastic Fuel, J. Korean Soc. Environ. Eng., 37, pp.636-641. 10.4491/KSEE.2015.37.11.636

Ebrahimi, P., Kumar, A., Khraisheh, M., 2020 : A review of recent advances in water-gas shift catalysis for hydrogen production, Emergent Mater., 3, pp.881-917. 10.1007/s42247-020-00116-y

Park, J.H., Im, H.B., Hwang, R.H., et al., 2017 : Effect of Ce Addition on Catalytic Activity of Cu/Mn Catalysts for Water Gas Shift Reaction, Trans. Korean Hydrog. New Energy Soc., 28, pp.1-8. 10.7316/KHNES.2017.28.1.1

Pal, D.B., Chand, R., Upadhyay, S.N., et al., 2018 : Performance of water gas shift reaction catalysts: A review, Renew, Sustain. Energy Rev., 93, pp.549-565. 10.1016/j.rser.2018.05.003

Ashok, J., Wai, M.H., Kawi, S., 2018 : Nickel-based Catalysts for High-temperature Water Gas Shift Reaction-Methane Suppression, ChemCatChem, 10, pp.3927-3942. 10.1002/cctc.201800031

Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 30
No :6
Pages :12-18
Received Date : 2021-10-05
Revised Date : 2021-10-18
Accepted Date : 2021-10-19
DOI :https://doi.org/10.7844/kirr.2021.30.6.12

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

All Issue