Influence of Pyrolysis Temperature on the Gaseous Products of Lignite

Zhou, Chen; Liu, Quan Sheng; Li, Yang; Teng, Ying Yue; Zhi, Ke Duan; Song, Yinmin; He, Run Xia

doi:10.4028/www.scientific.net/amr.524-527.883

Cited by 2 publications

(2 citation statements)

References 9 publications

(11 reference statements)

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“…Similar with the first route, studies on this aspect are still at the beginning stage, and more focus should be paid. Recently, we conducted some attempts on the direct use of LRCs or their derivatives without complex separation. − Humic acid (HA) mixtures extracted from LRC (typical lignite) by a diluted NaOH solution under mild conditions could be directly used to prepare Zr-based catalysts via the interaction of Zr 4+ with the acidic groups in HA, and the catalyst showed high efficiency for the conversion of biomass-derived furfural or ethyl levulinate. , Further studies showed that the raw lignite could be used directly to construct a Zr-based catalyst by a similar route, and the pretreatment of demineralization via acid washing of lignite could improve the stability of the obtained catalyst . These previous studies identified that the idea of the direct use of HA mixtures from lignite without separation and purification to construct a catalyst was feasible.…”

Section: Introductionmentioning

confidence: 99%

A General Route of Using Lignite Depolymerized Derivatives for Catalyst Construction: Insights into the Effects of the Derivative Structures and Solvents

Hao

Han²,

Yang³

et al. 2021

ACS Omega

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Depolymerization is an emerging and promising route for the value-added utilization of low-rank coal (LRC) resources, and how to use the complex depolymerized mixtures efficiently is of great importance for this route. In this work, we designed the rational route of using depolymerized mixtures from lignite via ruthenium ion-catalyzed oxidation (RICO) depolymerization directly without complex separation to construct a Zr-based hydrogenation catalyst. The prepared catalyst was applied into the catalytic transfer hydrogenation of biomass-derived carbonyl compounds. Meanwhile, a copper-based oxidation catalyst was also constructed via a similar route to investigate the universality of the proposed route. Special insights were given into how the depolymerized components with different structures influenced the performances of the catalysts. The effects of the solvents used during the catalyst preparation (H 2 O and DMF) were also studied. The results showed that the proposed route using the depolymerized mixtures from lignite via RICO to construct catalysts was feasible for both Zr-based and Cu-based catalysts. The two catalysts prepared gave high efficiency for their corresponding reaction, i.e. , the Zr-based catalyst for catalytic transfer hydrogenation of biomass-derived carbonyl compounds and the Cu-based catalyst for selective oxidation of alcohols into aldehydes. Different depolymerized components contributed differently to the activity of the catalyst, and the solvents during the preparation process could also influence the activity of the catalyst. The depolymerized components and the solvents influenced the activities of the Zr-based catalyst mainly via changing the Zr contents, the microenvironment of Zr 4+ , and the specific areas of the catalyst.

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Section: Introductionmentioning

confidence: 99%

A General Route of Using Lignite Depolymerized Derivatives for Catalyst Construction: Insights into the Effects of the Derivative Structures and Solvents

Hao

Han²,

Yang³

et al. 2021

ACS Omega

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“…The SL-C produced more CH 4 than the other four chars. For the SL-C char, there may remain insufficiently decomposed alkyl groups on the aromatic macromolecular structure, and such functional groups are cleaved during the heat-up to 700 ℃, contributing to the formation of CH 4 [8,9].…”

Section: Gas Compositionmentioning

confidence: 99%

Effects of Several Metals Species on Steam Gasification Behavior of Lignite from Inner Mongolia

Ban

Liu

et al. 2014

AMR

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The purpose of this study is to investigate the catalytic effects of different metals in Shengli lignite on the char reactivity. The pyrolysis of Shengli lignite and various metal catalyst loaded coal was investigated in a small fixed-bed reactor, and the gasification activity with steam for different chars was compared as well. The results show that Fe, Ni, Ca and K could effectively lowering the gasification temperature, enhancing the gasification reactivity of SL char. Alkali (K) and alkaline earth (Ca) could be feasibly used as catalysis for the catalytic steam gasification at relatively low temperatures (550~700°C) to produce gases with high H2 (63.2~63.8 v%) and low CO (below 0.9%), and promoting the carbon-water reaction, the water-gas shift reaction to some extent.

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Influence of Pyrolysis Temperature on the Gaseous Products of Lignite

Cited by 2 publications

References 9 publications

A General Route of Using Lignite Depolymerized Derivatives for Catalyst Construction: Insights into the Effects of the Derivative Structures and Solvents

A General Route of Using Lignite Depolymerized Derivatives for Catalyst Construction: Insights into the Effects of the Derivative Structures and Solvents

Effects of Several Metals Species on Steam Gasification Behavior of Lignite from Inner Mongolia

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