Hydrothermal liquefaction of rice straw: Effect of reaction environment

Singh, Rawel; Chaudhary, Kajal; Biswas, Bijoy; Balagurumurthy, Bhavya; Bhaskar, Thallada

doi:10.1016/j.supflu.2015.05.027

Cited by 65 publications

(14 citation statements)

References 20 publications

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“…Yin et al investigated the effects of different gases on the products in HTL of cattle manure. The results showed a high bio‐oil yield in the presence of a reducing atmosphere.…”

Section: Effect Of Operating Conditions On Htl Of Biomassmentioning

confidence: 99%

A review on the operating conditions of producing bio-oil from hydrothermal liquefaction of biomass

Xue

Chen

Zhao

et al. 2016

Int. J. Energy Res.

107

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Hydrothermal liquefaction (HTL) is a promising technology that involves converting biomass into a liquid energy carrier called bio-oil in sub/supercritical water. The unique physico-chemical properties of bio-oil, particularly its remarkably high energy density, renewability, and sustainability, can address current global environmental challenges and energy crisis. This review assesses the influence of operating parameters, including biomass type, reaction temperature, holding time, biomass/H 2 O ratio, heating rate, pressure, and atmosphere, and catalysis, on the yield and quality of bio-oil. The existing problems in HTL are also analyzed, and its further development is explored.

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“…Yin et al investigated the effects of different gases on the products in HTL of cattle manure. The results showed a high bio‐oil yield in the presence of a reducing atmosphere.…”

Section: Effect Of Operating Conditions On Htl Of Biomassmentioning

confidence: 99%

A review on the operating conditions of producing bio-oil from hydrothermal liquefaction of biomass

Xue

Chen

Zhao

et al. 2016

Int. J. Energy Res.

107

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“…Their HTL under various conditions (temperatures and resident times) for either bio-oil or carbon production has been studied previously [14, 15]. Lignocellulosic biomass is mainly composed of cellulose, hemicellulose, and lignin [16].…”

Section: Introductionmentioning

confidence: 99%

“…Lignocellulosic biomass, which is different from algae in both chemical composition and structure, is abundant in the world [ 13 ]. Their HTL under various conditions (temperatures and resident times) for either bio-oil or carbon production has been studied previously [ 14 , 15 ]. Lignocellulosic biomass is mainly composed of cellulose, hemicellulose, and lignin [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Methane potentials of wastewater generated from hydrothermal liquefaction of rice straw: focusing on the wastewater characteristics and microbial community compositions

Chen

Zhang

Rao

et al. 2017

Biotechnol Biofuels

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BackgroundHydrothermal liquefaction (HTL) has been well studied for the bio-oil production from biomass. However, a large amount of wastewater with high organic content is also produced during the HTL process. Therefore, the present study investigated the methane potentials of hydrothermal liquefaction wastewater (HTLWW) obtained from HTL of rice straw at different temperatures (170–320 °C) and residence times (0.5–4 h). The characteristics (e.g., total organic content, organic species, molecular size distribution, etc.) of the HTLWW were studied, and at the same time, microbial community compositions involved in AD of HTLWW were analyzed.ResultsThe highest methane yield of 314 mL CH4/g COD was obtained from the sample 200 °C–0.5 h (HTL temperature at 200 °C for 0.5 h), while the lowest methane yield 217 mL CH4/g COD was obtained from the sample 320 °C–0.5 h. These results were consistent with the higher amounts of hard biodegradable organics (furans, phenols, etc.) and lower amounts of easily biodegradable organics (sugars and volatile fatty acids) present in sample 320 °C–0.5 h compared to sample 200 °C–0.5 h. Size distribution analysis showed that sample 320 °C–0.5 h contained more organics with molecular size less than 1 kDa (79.5%) compared to sample 200 °C–0.5 h (66.2%). Further studies showed that hard biodegradable organics were present in the organics with molecular size higher than 1 kDa for sample 200 °C–0.5 h. In contrast, those organics were present in both the organics with molecular size higher and less than 1 kDa for sample 320 °C–0.5 h. Microbial community analysis showed that different microbial community compositions were established during the AD with different HTLWW samples due to the different organic compositions. For instance, Petrimonas, which could degrade sugars, had higher abundance in the AD of sample 200 °C–0.5 h (20%) compared to sample 320 °C–0.5 h (7%). The higher abundance of Petrimonas was consistent with the higher content of sugars in sample 200 °C–0.5 h. The higher Petrimonas abundance was consistent with the higher content of sugars in sample 200 °C–0.5 h. The genus Syntrophorhabdus could degrade phenols and its enrichment in the AD of sample 320 °C–0.5 h might be related with the highest content of phenols in the HTLWW.ConclusionsHTL parameters like temperature and residence time affected the biodegradability of HTLWW obtained from HTL of rice straw. More hard biodegradable organics were produced with the increase of HTL temperature. The microbial community compositions during the AD were also affected by the different organic compositions in HTLWW samples.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-017-0830-0) contains supplementary material, which is available to authorized users.

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“…Similar trends were discovered by Xu and Singh. 37,38 However, there was a certain threshold of holding time in the liquefaction process. As the biocrude yield peaked at 0.5 h, the further increase of holding time adverted results that the biocrude yield gradually decreased.…”

Section: Hydrothermal Catalytic Liquefaction Results With Different Omentioning

confidence: 99%

Hydrothermal liquefaction of high protein microalgae via clay material catalysts

Wang

Zhang

et al. 2017

RSC Adv.

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Hydrothermal liquefaction of rice straw: Effect of reaction environment

Cited by 65 publications

References 20 publications

A review on the operating conditions of producing bio-oil from hydrothermal liquefaction of biomass

A review on the operating conditions of producing bio-oil from hydrothermal liquefaction of biomass

Methane potentials of wastewater generated from hydrothermal liquefaction of rice straw: focusing on the wastewater characteristics and microbial community compositions

Hydrothermal liquefaction of high protein microalgae via clay material catalysts

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