<scp>Co‐use</scp>
            of organic herbal residue and red mud waste for syngas production by chemical looping gasification

Liu, Fang; Wu, Xin; Zhang, Xi; Yang, Li; Liu, Yang; Song, Zhengchang

doi:10.1002/er.5912

Cited by 14 publications

(7 citation statements)

References 63 publications

(106 reference statements)

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“…The compositional analysis of RM is similar to that of the synthetic OCs, with large amounts of Fe 2 O 3 and inert compounds, such as Al 2 O 3 , SiO 2 , and TiO 2 , and AAEM-containing compounds, such as CaO and Na 2 O. Hence, many studies have been conducted on the use of RM as an OC. − More than 90% of the RM is produced by the Bayer process, , and its composition is mainly related to the type of bauxite used and the impurities therein. Generally speaking, bauxite can be divided into types containing gibbsite, boehmite, diaspore, and mixtures thereof.…”

Section: Introductionmentioning

confidence: 84%

Dechlorination Performance of Chemical Looping Conversion Using Red Mud as an Oxygen Carrier

Jiang

Chen

et al. 2022

Energy Fuels

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Chemical looping (CL) conversion is a fuel heat utilization technology with CO2 capture and pollution control capability. During the treatment of Cl-containing organic solid waste, a large amount of HCl is generated, along with highly toxic polychlorinated dibenzo-p-dioxins and polychlorinated dibenzo-p-furans, thereby resulting in serious equipment corrosion and environmental harm. Red mud (RM) produced by the alumina industry is a potential cheap oxygen carrier (OC) with in situ dechlorination capability. In this paper, three types of RM are selected to study the evolution and varieties of Na- and Ca-containing compounds in the process of OC preparation and dechlorination. The dechlorination mechanisms and performances of the RM OCs under various reaction conditions are discussed. The results verify that the Na- and Na/Ca-rich RM OCs exhibit good dechlorination performances at a high reaction temperature. The RM OC components with dechlorination activity include Na in the form of soluble alkali (e.g., NaOH), Na2Ti3O7, and Na6Al4Si4O17, along with Ca in the form of CaO, Ca2SiO4, and CaTiO3, whereas NaAlSiO4, Na1.15(Al1.15Si0.85O4), and Ca2Al2SiO7 are inert. The dechlorination performances of the RM OCs are inhibited by the presence of water vapor and high temperature. In the dechlorination process using RM OCs, HCl first reacts rapidly with active elements on the surface of the OC with high dechlorination efficiency. With the saturation of surface-active elements, the reaction enters the HCl diffusion control stage, when the appropriate particle size of the OC and the gas residence time are helpful for improving the dechlorination efficiency.

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Section: Introductionmentioning

confidence: 84%

Dechlorination Performance of Chemical Looping Conversion Using Red Mud as an Oxygen Carrier

Jiang

Chen

et al. 2022

Energy Fuels

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“…To increase the efficiency of TCMR pyrolysis, reactor linkage technology, and feedstock co‐pyrolysis have been extensively applied [110–114] . Indeed, some academics have proposed combining a transport fluidized bed with a fluidized bed for gasifying TCMR [110] .…”

Section: Pyrolysis Of Tcmrmentioning

confidence: 99%

“…In addition, a two‐stage gasification method that includes an upstream fluidized bed and a downstream gasifier for TCMR pyrolysis has been studied in other literature [111] . To recycle the utilization of solid waste, many researchers co‐pyrolyze TCMR and other waste (high‐ash paper sludge, red mud, and animal and poultry waste) to produce syngas [112–114] …”

Section: Pyrolysis Of Tcmrmentioning

confidence: 99%

“…[111] To recycle the utilization of solid waste, many researchers co-pyrolyze TCMR and other waste (high-ash paper sludge, red mud, and animal and poultry waste) to produce syngas. [112][113][114]…”

Section: Effect Of Gasifiersmentioning

confidence: 99%

“…[109] To increase the efficiency of TCMR pyrolysis, reactor linkage technology, and feedstock co-pyrolysis have been extensively applied. [110][111][112][113][114] Indeed, some academics have proposed combining a transport fluidized bed with a fluidized bed for gasifying TCMR. [110] In addition, a two-stage gasification method that ChemistrySelect includes an upstream fluidized bed and a downstream gasifier for TCMR pyrolysis has been studied in other literature.…”

Section: Effect Of Gasifiersmentioning

confidence: 99%

See 2 more Smart Citations

Recent Advances in Solid Residues Resource Utilization in Traditional Chinese Medicine

Long

Guo

et al. 2023

ChemistrySelect

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Chinese medicine is widely employed in illness prevention and treatment. In recent years, the increased demand for Chinese medicine resources has resulted in a large quantity of waste created during industrialization. However, traditional methods for treating herbal residues, including burning, stacking, and burying, can cause significant environmental damage and resource waste. Furthermore, these application approaches have a low level of resource utilization and a low degree of utilization. Therefore, developing a classification management system is a necessary precondition for reusing Chinese herb residues for medicinal, feed, fertilizer, and energy resource reuse. This paper reviews the potential applications of Chinese herb residues in the extraction of active resources, composting, feed addition, bioethanol preparation, and pyrolysis to biochar, bio‐oil, and fuel gas. Overall, this work provides a foundation for further investigation into the high‐value usage model and resource reuse pathway of Chinese herb residues.

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Alkali metal modified iron‐nickel oxygen carrier to produce hydrogen‐rich synthesis gas by chemical looping gasification with pine sawdust

Wang

Liu

et al. 2020

Intl J of Energy Research

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In the research of biomass chemical looping gasification technology, the production of hydrogen-rich synthesis gas has received increasing attention. In this paper, iron-nickel oxygen carriers were prepared by the mechanical and impregnation method. Chemical looping gasification experiments were performed with pine sawdust in a self-built fixed-bed reactor to prepare hydrogenrich synthesis gas. Experimental results showed that for the iron-nickel oxygen carrier with a loading ratio of 3% NiO under reaction conditions of 800 C, ratio of steam content to biomass (S/B) of 1.25, and ratio of lattice oxygen to biomass (O/B) of 0.2, the volume fraction of hydrogen in the synthesized gas reached 43.06%; correspondingly, the carbon conversion rate was 78.22%, the low calorific value of syngas was 7.49 MJ/Nm 3 , and the gas production rate was 1.25 Nm 3 /kg. After modification of the iron-nickel oxygen carrier with a mass ratio of 5% K 2 CO 3 , the volume fraction of hydrogen in the prepared synthesis gas increased to 47.83%, the corresponding carbon conversion rate was 85.44%, and the low-level calorific value was 7.95 MJ/Nm 3. The gas production rate was 1.49 Nm 3 /kg.

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Co‐use of organic herbal residue and red mud waste for syngas production by chemical looping gasification

Cited by 14 publications

References 63 publications

Dechlorination Performance of Chemical Looping Conversion Using Red Mud as an Oxygen Carrier

Dechlorination Performance of Chemical Looping Conversion Using Red Mud as an Oxygen Carrier

Recent Advances in Solid Residues Resource Utilization in Traditional Chinese Medicine

Alkali metal modified iron‐nickel oxygen carrier to produce hydrogen‐rich synthesis gas by chemical looping gasification with pine sawdust

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