Effects of four types of dilute acid washing on moso bamboo pyrolysis using Py–GC/MS

Dong, Qing; Zhang, Shuping; Zhang, Li; Ding, Kuan; Xiong, Ya

doi:10.1016/j.biortech.2015.02.076

Cited by 91 publications

(49 citation statements)

References 32 publications

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“…Pretreatment is necessary for obtaining desirable pyrolysis products [63], and a variety of pretreatment methods prior to fast pyrolysis have been developed [74], including water leaching [87][88][89], dilute acid and alkali pretreatment [90][91][92], bio-oil washing [21], thermal pretreatment (including torrefaction and hydrothermal pretreatment) [93][94][95], and combined pretreatment (such as two-step aciddemineralization and torrefaction [96]). Water leaching removes water-soluble alkali and alkaline species as well as undesirable inorganics (e.g.…”

Section: Pretreatment Technologiesmentioning

confidence: 99%

The multi-scale challenges of biomass fast pyrolysis and bio-oil upgrading: Review of the state of art and future research directions

Sharifzadeh

Sadeqzadeh

Guo

et al. 2019

Progress in Energy and Combustion Science

363

129

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Section: Pretreatment Technologiesmentioning

confidence: 99%

The multi-scale challenges of biomass fast pyrolysis and bio-oil upgrading: Review of the state of art and future research directions

Sharifzadeh

Sadeqzadeh

Guo

et al. 2019

Progress in Energy and Combustion Science

363

129

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“…The HTT effects on the production rate and compositions of acid products are presented in Figure 6. The main acids identified in MSW were n -hexadecanoic acid, acetic acid and octadecanoic acid, which are probably obtained from the organic extractives contained in MSW (Dong et al, 2015). The production rates of these three acids in the MSW pyrolysis acid group were 37.53%, 23.56% and 19.49%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Chemical structure analysis and fast micro-pyrolysis study of hydrochar derived from hydrothermal treatment of municipal solid waste

Lin

Chen

et al. 2020

Waste Manag Res

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Hydrothermal treatment (HTT) experiments were conducted at 210○C and 230○C with 30, 60 and 90 min residence times. Fourier transform infrared spectroscopy (FT-IR) and 13C solid-state nuclear magnetic resonance (NMR) were employed to elucidate the effect of HTT on the chemical structure of municipal solid waste. FT-IR results clearly demonstrate that decarboxylation and aromatization reactions occurred during HTT. Fewer types of carbon skeleton structures were observed in the 13C solid-state NMR of hydrochars. The aliphaticity yield increased from 74.84% to 91.57% with increasing experiment parameters. In addition, the aromatization reaction was more dramatic in the early stage time, while carbonyl compounds decomposed during the HTT process. Pyrolysis gas chromatography mass spectrometry analysis showed that HTT had positive effects on the simplification of the pyrolytic gas component. In addition, all hydrochars were significantly inhibited to the formation of aromatic compounds with a minor relative peak area of 19.89%. Moreover, hydrochars obtained at a relatively low temperature could achieve a higher yield of hydrocarbons, and hydrocarbons could be partly purified after the HTT process. Overall, the available values of fast pyrolysis products were upgraded by the HTT process.

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“…According to the description of Zareihassangheshlaghi et al [23], the increased concentration of metal impurities on the surface of straw biomass ash could be found during the conversion, which could promote the formation of agglomeration and char, thereby hindering the following biomass decomposition. Also, acid-leaching treatment could increase the porosity of biomass and promote the conversion of cellulose and hemicellulose into sugars, leading to a large release of volatiles [20]. The functional group characteristics of specific elements in different samples were investigated using XPS analysis.…”

Section: Characteristics Of Raw/acid Leached Maize Strawmentioning

confidence: 99%

“…According to Figure 4, ash agglomeration and sintering of particles resulted in larger ash particles coating the surface of char products from RMS. The acid-leaching pre-treatment could increase the porosity of the biomass and promoted the removal of volatiles [20].…”

Section: Distribution Of Pyrolysis Productsmentioning

confidence: 99%

“…are thought to influence the devolatilization and combustion process [18,19]. Acid-leaching treatment can reduce the content of ash and AAEMs, effectively improve the combustion performance and reduce ash melting, slagging, and corrosion [20][21][22][23], but the impact of AAEMs on the NO x precursor generations of biomass pyrolysis remains unclear. Deep research on the effects of de-ashing and demineralization by acid-leaching on nitrogen transfer and conversion would help the clean utilization of straw biomass fuel.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen Migration during Pyrolysis of Raw and Acid Leached Maize Straw

Mou

Zou

et al. 2021

Sustainability

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Solid biofuel is considered as a possible substitute for coal in household heat production because of the available and sustainable raw materials, while NOx emissions from its combustion have become a serious problem. Nitrogen-containing compounds in pyrolysis products have important effects on the conversion of fuel-N into NOx-N. Understanding these converting pathways is important for the environmentally friendly use of biomass fuels. The nitrogen migration during pyrolysis of raw and acid leached maize straw at various temperatures was investigated in this study. Thermal gravimetric analysis and X-ray photoelectron spectroscopy were used to investigate the performances of thermal decomposition and pyrolysis products from samples. The main nitrogen functional groups in biomass and biochar products were N-A (amine-N/amide-N/protein-N), pyridine-N, and pyrrole-N, according to the findings. The most common gaseous NOx precursor was NH3, which was produced primarily during the conversion of N-A to pyridine-N and pyrrole-N. The formation of HCN mainly came from the secondary decomposition of heterocyclic-N at high temperatures. Before the pyrolysis temperature increased to 650 °C, more than half of the fuel-N was stored in the biochar. At the same pyrolysis temperature, acid-leached maize straw yielded more gas-N and char-N than the raw biomass. The highest char-N yield of 76.39 wt% was obtained from acid-leached maize straw (AMS) pyrolysis at 350 °C. Low pyrolysis temperature and acid-leaching treatment can help to decrease nitrogen release from stable char structure, providing support for reducing nitrogenous pollutant emissions from straw fuel.

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Effects of four types of dilute acid washing on moso bamboo pyrolysis using Py–GC/MS

Cited by 91 publications

References 32 publications

The multi-scale challenges of biomass fast pyrolysis and bio-oil upgrading: Review of the state of art and future research directions

The multi-scale challenges of biomass fast pyrolysis and bio-oil upgrading: Review of the state of art and future research directions

Chemical structure analysis and fast micro-pyrolysis study of hydrochar derived from hydrothermal treatment of municipal solid waste

Nitrogen Migration during Pyrolysis of Raw and Acid Leached Maize Straw

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