Coal hydrogasification: Entrained flow bed design-operation and experimental study of hydrogasification characteristics

Yuan, Shenfu; Bi, Jing; Qu, Xuanhui; Lu, Qi; Cao, Qiue; Li, Wei; Yao, Guini; Wang, Qiufeng; Wang, Jiliang

doi:10.1016/j.ijhydene.2018.01.007

Cited by 10 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the main drawback of IGT-HYGAS and Rockwell technology was related to the considerable formation of carbon dioxide, while the BG-OG and ARCH gasifiers suffered issues related to the control of the synthesis gas recirculating ratio. As a result, the economic profits of the above pilot plants were not competitive and no commercial demonstration was developed [57]. Thus, researchers' interest is devoted to the design of new hydrogasifiers, with reduced CO 2 production and reduced recycle ratio limitations.…”

Section: Process Layouts For the Hydrogasification Of Coal-derived Ma...mentioning

confidence: 99%

“…In order to exploit the benefits of fluidized bed reactors (short residence time and good solid-gas contact), avoiding, at the same time, particle agglomeration and defluidization, the performance of an entrained flow bed (operating up to 3 MPa and from 700 to 850 • C) for coal hydrogasification was also investigated [57]. The laboratory apparatus included a facility for high-H 2 pressure feeding, a high-temperature tube reactor, a gas-char separation and collection system, a wire mesh filter, a tar cooling and collection system, and support equipment.…”

Section: Process Layouts For the Hydrogasification Of Coal-derived Ma...mentioning

confidence: 99%

See 1 more Smart Citation

A Review of Coal and Biomass Hydrogasification: Process Layouts, Hydrogasifiers, and Catalysts

2023

View full text Add to dashboard Cite

Despite the increasing need for chemicals and energy, the scenario in which fossil feedstocks can be completely replaced by renewables is currently unrealistic. Thus, the combination of biomass and non-renewable matrix-based (i.e., coal) technologies could provide a greener way toward the partial substitution of traditional fuels. The hydrogasification of carbonaceous feedstocks (coal and biomass) for the main production of CH4 offers a promising alternative to this end. However, hydrogasification has received very little attention, and the present review seeks to shed light on the process, reactor, and catalytic advances in the field. Independent of the selected matrices, various efforts have been devoted to the identification of efficient methods for the production of hydrogen feed to the gasifier and energy as well as the reduction in pollutant emissions from the plants. Moreover, the reactor configurations proposed are focused on the intensification of gas-solid contact to reduce by-product formation. The co-hydrogasification of both renewable and non-renewable feedstock is also reviewed, paying attention to the synergistic effect between the two matrices. In addition, due to the slow rates of hydrogasification reaction, the key role of catalysts and feedstock impurities on the reaction kinetics is discussed.

show abstract

Section: Process Layouts For the Hydrogasification Of Coal-derived Ma...mentioning

confidence: 99%

Section: Process Layouts For the Hydrogasification Of Coal-derived Ma...mentioning

confidence: 99%

A Review of Coal and Biomass Hydrogasification: Process Layouts, Hydrogasifiers, and Catalysts

2023

View full text Add to dashboard Cite

show abstract

“…The coal-to-SNG technologies are often categorized into two-stage gasification (TSG), coal catalytic gasification (CCG), and coal hydrogasification (CHG) (Suuberg et al 1980;He et al 2013;Yuan et al 2018;Chang et al 2020). The TSG represented by the Lurgi gasifier has been commercialized, while the CCG and CHG are under demonstration (Li et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, CCG is characterized by high coal conversion (~ 95%) and low CH 4 yield (~ 25%). From the perspective of CH 4 production, CHG is the most appealing route, as it produces CH 4 with a high yield (30%-50%) and thermal efficiency (79.6%) (Steinberg 2005;Yuan et al 2018). However, the essence of CHG is a hydropyrolysis process.…”

Section: Introductionmentioning

confidence: 99%

A critical review on direct catalytic hydrogasification of coal into CH4: catalysis process configurations, evaluations, and prospects

Yan,

Feng,

Yuan

et al. 2024

Int J Coal Sci Technol

Self Cite

View full text Add to dashboard Cite

Coal catalytic hydrogasification (CCHG) is a straightforward approach for producing CH4, which shows advantages over the mature coal-to-CH4 technologies from the perspectives of CH4 yield, thermal efficiency, and CO2 emission. The core of CCHG is to make carbon in coal convert into CH4 efficiently with a catalyst. In the past decades, intensive research has been devoted to catalytic hydrogasification of model carbon (pitch coke, activated carbon, coal char). However, the chemical process of CCHG is still not well understood because the coal structure is more complicated, and CCHG is a combination of coal catalytic hydropyrolysis and coal char catalytic hydrogasification. This review seeks to shed light on the catalytic process of raw coal during CCHG. The configuration of suitable catalysts, operating conditions, and feedstocks for tailoring CH4 formation were identified, and the underlying mechanisms were elucidated. Based on these results, the CCHG process was evaluated, emphasizing pollutant emissions, energy efficiency, and reactor design. Furthermore, the opportunities and strategic approaches for CCHG under the restraint of carbon neutrality were highlighted by considering the penetration of “green” H2, biomass, and CO2 into CCHG. Preliminary investigations from our laboratories demonstrated that the integrated CCHG and biomass/CO2 hydrogenation process could perform as an emerging pathway for boosting CH4 production by consuming fewer fossil fuels, fulfilling the context of green manufacturing. This work not only provides systematic knowledge of CCHG but also helps to guide the efficient hydrogenation of other carbonaceous resources such as biomass, CO2, and coal-derived wastes.

show abstract

“…Although the pyrolysis and gasification of coal have been studied for many years, there are still a lot of challenges to overcome. For instance, hydrogen used as gasification agent is needed in the gasification process of coal to produce CH 4 , but the price of hydrogen is expensive [19]. Since the digestate has high H/C ratio, co-gasification of the digestate and coal may enhance the overall energy efficiency if they are blended with appropriate proportion and approach.…”

Section: Introductionmentioning

confidence: 99%

Interaction and Kinetics Study of the Co-Gasification of High-solid Anaerobic Digestate and Lignite

et al. 2020

View full text Add to dashboard Cite

This study aims at investigating the interaction and kinetics behavior of the co-gasification of digestate and lignite. The co-pyrolysis performances of digestate and lignite blended by dry process were better than that blended by wet process, while the wet-blending process could improve the performance in co-gasification stage because of the larger pore diameter and pore volume. When anaerobic digestion (AD) time was 40 days, the synergistic interaction between digestate and lignite were the most remarkable based on the results of thermogravimetric analysis (TG) and the experiments in the lab-scale downdraft fixed bed gasifier. Kinetics study showed that the increase of AD time and the addition of digestate in lignite decreased the activation energy of the co-gasification reaction.

show abstract

Coal hydrogasification: Entrained flow bed design-operation and experimental study of hydrogasification characteristics

Cited by 10 publications

References 30 publications

A Review of Coal and Biomass Hydrogasification: Process Layouts, Hydrogasifiers, and Catalysts

A Review of Coal and Biomass Hydrogasification: Process Layouts, Hydrogasifiers, and Catalysts

A critical review on direct catalytic hydrogasification of coal into CH4: catalysis process configurations, evaluations, and prospects

Interaction and Kinetics Study of the Co-Gasification of High-solid Anaerobic Digestate and Lignite

Contact Info

Product

Resources

About