Direct reduction of iron oxides based on steam reforming of bio-oil: a highly efficient approach for production of DRI from bio-oil and iron ores

Gong, Feiyan; Ye, Tongqi; Yuan, Lixia; Kan, Tao; Torimoto, Youshifumi; Yamamoto, Makoto; Li, Quanxin

doi:10.1039/b915830h

Cited by 64 publications

(20 citation statements)

References 54 publications

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“…The FeO(OH) is reduced to Fe 3 O 4 under mesothermal conditions at 673–873 K by reducing components including H 2 , CO, and amorphous carbon, which were formed during the pyrolysis process (Eqs. 3–5)3132. For comparison, PC materials without magnetism that were derived from raw biomass are also synthesized.…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis of highly efficient and recyclable magnetic solid acid from biomass waste

Liu

Tian

Jiang

et al. 2013

Sci Rep

150

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In this work, sawdust, a biomass waste, is converted into a magnetic porous carbonaceous (MPC) solid acid catalyst by an integrated fast pyrolysis–sulfonation process. The resultant magnetic solid acid has a porous structure with high surface area of 296.4 m2 g−1, which can be attributed to the catalytic effect of Fe. The catalytic activity and recyclability of the solid acid catalyst are evaluated during three typical acid-catalyzed reactions: esterification, dehydration, and hydrolysis. The favorable catalytic performance in all three reactions is attributed to the acid's high strength with 2.57 mmol g−1 of total acid sites. Moreover, the solid acid can be reused five times without a noticeable decrease in catalytic activity, indicating the stability of the porous carbon (PC)–sulfonic acid group structure. The findings in the present work offer effective alternatives for environmentally friendly utilization of abundant biomass waste.

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Section: Resultsmentioning

confidence: 99%

Facile synthesis of highly efficient and recyclable magnetic solid acid from biomass waste

Liu

Tian

Jiang

et al. 2013

Sci Rep

150

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“…Bio‐oil was produced by the fast pyrolysis of biomass in a circulating fluidized bed with a capacity of 120 kg h −1 of oil at our Lab . The main elemental composition of bio‐oil feedstock derived from fast pyrolysis of straw stalk contains 42.3 wt% C, 7.9 wt% H and 49.4 wt% O.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous work, attention has been paid to the production of hydrogen, bio‐syngas and biofuels from bio‐oil . The main purpose of this work is to selectively produce light olefins through the catalytic cracking of bio‐oil using magnesium modified HZSM‐5 catalyst.…”

Section: Introductionmentioning

confidence: 99%

Selective production of green light olefins by catalytic conversion of bio‐oil with Mg/HZSM‐5 catalyst

Hong

Gong

Fan

et al. 2012

J of Chemical Tech & Biotech

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BACKGROUND : Light olefins are the basic feedstocks for the petrochemical industry. So far, the olefins yield from bio‐oil is noticeably lower than that from methanol, ethanol and naphtha, and thereby needs to be improved by optimizing catalysts and cracking conditions. The main purpose of this work is to selectively produce light olefins through the catalytic cracking of bio‐oil using the magnesium modified HZSM‐5 catalyst. RESULTS Catalytic conversion of bio‐oil and its model compounds into light olefins was performed using the Mg/HZSM‐5 catalyst. The highest olefins yield from bio‐oil was 0.25 kg olefins (kg−1 bio‐oil) with a carbon yield of 59.3 C‐mol% and nearly complete bio‐oil conversion. The reaction conditions and addition of magnesium into the HZSM‐5 zeolite can be used to control both olefins yield and selectivity. In addition, the yield of light olefins from the pyrolysis of bio‐oil is much lower than the level from bio‐oil catalytic cracking. CONCLUSION Moderately increasing the medium acid sites through addition of Mg into the zeolite effectively enhanced olefins selectivity and improved catalyst stability. The production of light olefins from bio‐oil is closely associated with the chemical composition and hydrogen to carbon effective ratios of feedstock. Copyright © 2012 Society of Chemical Industry

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“…Since the adsorption process is easily operated and the required quality of Ag + source is not high, even the Ag + in wastewater may be qualified for this application. [35][36][37] Meanwhile, during the fast pyrolysis process, the temperature of the biomass rose at a very high heating rate (e.g., more than 100 K/min), Page 2 of 10 Environmental Science: Nano 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 Please do not adjust margins Please do not adjust margins and its components (e.g., lignin, cellulose, and hemicelluloses) were quickly decomposed to volatile matters and condensed to form bio-oil, 13 a liquid can be used as fuel or chemical feedstock. As the Ag + is also widely present in various wastewaters, 4 this method may also bring significant environmental and economical benefits.…”

Section: Synthesis Of the Ag@biocharmentioning

confidence: 99%

One-pot high yield synthesis of Ag nanoparticle-embedded biochar hybrid materials from waste biomass for catalytic Cr(vi) reduction

Liu

Ling

Wang

et al. 2016

Environ. Sci.: Nano

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Disposal of heavy metals contaminated biomass obtained from phytoremediation or biosorption by environmentally benign methods is a big challenge. In this study, we proposed a win-win strategy to recycle the Ag contaminated biomass by fast pyrolysis to obtain renewable bio-oil and catalytic reduction of Cr(VI) with the Ag-embedded biochar. We herein focused on the one-pot preparation of Ag nanoparticles embedded biochar hybrid material (Ag@biochar) by fast pyrolysis of the Ag preloaded biomass and their catalytic effect on Cr(VI) reduction. The results show that Ag@biochar can totally catalytic reduce the Cr(VI) in aqueous solution within 20 min using formic acid as a reducing agent at 323 K. The particle size of AgNPs on biochar was found as pyrolysis-temperature dependent and played an important role in the reduction of Cr(VI). We found the reduction of Cr(VI) catalyzed by Ag@biochar follows a CO (produced from HCOOH decomposition) reduction mechanism which is quite different from H2 reduction mechanism with the catalysis of some noble metal based catalysts (e.g., Pd and Pt). This study offered a sustainable approach for simultaneous disposal of the biomass waste and synthesis of functional materials, and might be expanded in the recycle of other metals contaminated biomass (e.g., Cu, Ni, Co, Zn, and Fe).The catalytic activity of the Ag@biochar was evaluated in the catalytic reduction of Cr(VI) with HCOOH, which was monitored by UV-vis spectroscopy. As shown in Fig. 5a, the intensity of the characteristic absorption peak of Cr(VI) at 353 nm decreases significantly with the increase of reaction time, suggesting that the Cr(VI) can be effectively converted by HCOOH with the catalysis of Ag@biochar. For comparison, the concentrations of Cr(VI) in two control experiments which employed only Ag@biochar or HCOOH (Fig. 5b), suggesting that the reduction of Cr(VI) cannot proceed without catalyst or HCOOH. When the raw biochar without Ag NPs was used for catalyst (Fig. 5b), the concentration of Cr(VI) only slightly decreased within 20 min, indicating that the activity of the Ag@biochar in the reduction of the Cr(VI) was mainly related to the excellent catalytic properties of the Ag NPs.The catalytic activity of the Ag@biochar is related to the particle size of Ag NPs, which is influenced by the pyrolysis temperature. Fig. 5c shows the Cr(VI) reduction with the catalysis of Ag@biochar formed in different temperatures. It can be seen that the catalytic activities of Ag@biochar-500 (average Ag particle size 7.6 nm) and Ag@biochar-600 (average Ag particle size 7.1 nm) are very similar, and both of them are much higher than that of Ag@biochar-400 (average Ag particle size 9.7 nm), suggesting that small Ag particles is favorable for catalyzing the Cr(VI) reduction with HCOOH. It can be explained as follows: firstly, there are more active sites in the Ag NPs with smaller size under the same conditions, offering more catalytic sites for the reactions; secondly, smaller particles may present a higher proportion of

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Direct reduction of iron oxides based on steam reforming of bio-oil: a highly efficient approach for production of DRI from bio-oil and iron ores

Cited by 64 publications

References 54 publications

Facile synthesis of highly efficient and recyclable magnetic solid acid from biomass waste

Facile synthesis of highly efficient and recyclable magnetic solid acid from biomass waste

Selective production of green light olefins by catalytic conversion of bio‐oil with Mg/HZSM‐5 catalyst

One-pot high yield synthesis of Ag nanoparticle-embedded biochar hybrid materials from waste biomass for catalytic Cr(vi) reduction

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