Pyrolysis gas as a carbon source for biogas production via anaerobic digestion

Li, Yeqing; Su, Dongfang; Luo, Sen; Jiang, Hao; Qian, Mingyu; Zhou, Hongjun; Street, Jason; Luo, Yan; Xu, Quan

doi:10.1039/c7ra08559a

Cited by 23 publications

(8 citation statements)

References 27 publications

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“…Besides, pyrolysis gas can be used as an energy source. Also, it has been conceptually converted into biogas (91.1% CH 4 ) via anaerobic digestion with Methanobacterium (Li et al, 2017). Based on an overall expected contribution margin with the chosen approach, we conclude that an industrial‐scale process is cost‐effective.…”

Section: Resultsmentioning

confidence: 99%

Limited life cycle and cost assessment for the bioconversion of lignin‐derived aromatics into adipic acid

Duuren

Wild

Starck

et al. 2020

Biotech & Bioengineering

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Lignin is an abundant and heterogeneous waste byproduct of the cellulosic industry, which has the potential of being transformed into valuable biochemicals via microbial fermentation. In this study, we applied a fast‐pyrolysis process using softwood lignin resulting in a two‐phase bio‐oil containing monomeric and oligomeric aromatics without syringol. We demonstrated that an additional hydrodeoxygenation step within the process leads to an enhanced thermochemical conversion of guaiacol into catechol and phenol. After steam bath distillation, Pseudomonas putida KT2440‐BN6 achieved a percent yield of cis, cis‐muconic acid of up to 95 mol% from catechol derived from the aqueous phase. We next established a downstream process for purifying cis, cis‐muconic acid (39.9 g/L) produced in a 42.5 L fermenter using glucose and benzoate as carbon substrates. On the basis of the obtained values for each unit operation of the empirical processes, we next performed a limited life cycle and cost analysis of an integrated biotechnological and chemical process for producing adipic acid and then compared it with the conventional petrochemical route. The simulated scenarios estimate that by attaining a mixture of catechol, phenol, cresol, and guaiacol (1:0.34:0.18:0, mol ratio), a titer of 62.5 (g/L) cis, cis‐muconic acid in the bioreactor, and a controlled cooling of pyrolysis gases to concentrate monomeric aromatics in the aqueous phase, the bio‐based route results in a reduction of CO2‐eq emission by 58% and energy demand by 23% with a contribution margin for the aqueous phase of up to 88.05 euro/ton. We conclude that the bio‐based production of adipic acid from softwood lignins brings environmental benefits over the petrochemical procedure and is cost‐effective at an industrial scale. Further research is essential to achieve the proposed cis, cis‐muconic acid yield from true lignin‐derived aromatics using whole‐cell biocatalysts.

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Section: Resultsmentioning

confidence: 99%

Limited life cycle and cost assessment for the bioconversion of lignin‐derived aromatics into adipic acid

Duuren

Wild

Starck

et al. 2020

Biotech & Bioengineering

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“…Traditional catalytic methanation needs high pressure and temperature (230–700 °C) and a metal catalyst, which imposes high cost with low energy efficiency (Guiot et al 2011 ). Li et al (Li et al 2017a ) have investigated the new approach for employing pyrolysis products as a reservoir of carbon for biogas production. In this study, the effects of different parameters on biomethanation of pyrolysis gas have been assessed.…”

Section: Recent Progress In Biogas Productionmentioning

confidence: 99%

A critical review of biogas production and usage with legislations framework across the globe

Abanades

Abbaspour

Ahmadi

et al. 2021

Int. J. Environ. Sci. Technol.

164

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This review showcases a comprehensive analysis of studies that highlight the different conversion procedures attempted across the globe. The resources of biogas production along with treatment methods are presented. The effect of different governing parameters like feedstock types, pretreatment approaches, process development, and yield to enhance the biogas productivity is highlighted. Biogas applications, for example, in heating, electricity production, and transportation with their global share based on national and international statistics are emphasized. Reviewing the world research progress in the past 10 years shows an increase of ~ 90% in biogas industry (120 GW in 2019 compared to 65 GW in 2010). Europe (e.g., in 2017) contributed to over 70% of the world biogas generation representing 64 TWh. Finally, different regulations that manage the biogas market are presented. Management of biogas market includes the processes of exploration, production, treatment, and environmental impact assessment, till the marketing and safe disposal of wastes associated with biogas handling. A brief overview of some safety rules and proposed policy based on the world regulations is provided. The effect of these regulations and policies on marketing and promoting biogas is highlighted for different countries. The results from such studies show that Europe has the highest promotion rate, while nowadays in China and India the consumption rate is maximum as a result of applying up-to-date policies and procedures.

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“…However, only 1–2% of lignin is isolated from wood pulping for commercial applications; the majority is burned onsite for heat and pulping chemical recovery [6]. With the increasing awareness of environmental issues and the depletion of fossil fuels, there is a tremendous research interest in utilizing biomass like lignin for the production of sustainable/renewable fuels and chemicals [7,8,9,10,11,12] and carbon-based nanomaterials like active carbons [13,14], carbon fibers [15], templated carbon [16], and graphene [17] through thermal conversion technologies.…”

Section: Introductionmentioning

confidence: 99%

Thermal Decomposition of Kraft Lignin under Gas Atmospheres of Argon, Hydrogen, and Carbon Dioxide

Yan

Zhang

et al. 2018

Polymers

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Abstract:The behaviors of thermal decomposition of kraft lignin under three different gases (Ar, CO 2 , or H 2 ) were analyzed and compared using a temperature-programmed decomposition-mass spectrometry (TPD-MS) system. Experimental results indicated that Ar atmosphere produced the highest yield of solid chars, while H 2 atmosphere generated the highest yield of liquids and CO 2 atmosphere had the highest yield of gases. TPD-MS results showed that H 2 atmosphere was consumed at the temperature range from 205 to 810 • C and CO 2 atmosphere was consumed at the temperature range from 185 to 1000 • C. The H 2 promoted the cleavage of lignin side chains and significantly enhanced the formation of CH 4 , C 6 H 6 , HCHO, C 6 H 5 OH, CH 3 OH, and tars. The percentages of water in produced liquids were 90.1%, 85.3%, and 95.5% for Ar, H 2 , and CO 2 as atmosphere, respectively. The H 2 yielded more organic chemicals in produced liquids compared to the other two gases. The observed organic chemicals were mainly acetic acid, phenols, ketones, alcohols, aldehydes, and esters. BET surface areas of solid products were 11.3, 98.5, and 183.9 m 2 /g for Ar., H 2 , and CO 2 as the atmosphere, respectively. C-H-O-N-S elemental and morphology analyses on solid products indicated that the lowest carbon content and the highest oxygen content were obtained if Ar atmosphere was used, while H 2 and CO 2 yielded more carbon in final solid products. Solid products obtained under CO 2 or H 2 atmosphere contained sphere-shaped nanoparticles.

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Pyrolysis gas as a carbon source for biogas production via anaerobic digestion

Abstract: Different biomass was pyrolyzed to pyrolysis gas, which was converted to CH4 by bio-fermentation. SPG was bioupgraded to high quality biogas by the addition of H2.

Cited by 23 publications

References 27 publications

Limited life cycle and cost assessment for the bioconversion of lignin‐derived aromatics into adipic acid

Limited life cycle and cost assessment for the bioconversion of lignin‐derived aromatics into adipic acid

A critical review of biogas production and usage with legislations framework across the globe

Thermal Decomposition of Kraft Lignin under Gas Atmospheres of Argon, Hydrogen, and Carbon Dioxide

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