Dual pretreatment of mixing H2O2 followed by torrefaction to upgrade spent coffee grounds for fuel production and upgrade level identification of H2O2 pretreatment

Chen, Wei‐Hsin; Ho, Kuan-Yu; Lee, Kuan‐Ting; Ding, Lu; Lin, Kun‐Yi Andrew; Rajendran, Saravanan; Singh, Yashvir; Chang, Jo‐Shu

doi:10.1016/j.envres.2022.114016

Cited by 9 publications

(1 citation statement)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bio-waste sludge has been used for the filtration of H 2 S and odor compounds [2][3][4], as well as energy conversion. Among thermal conversion from biowaste to energy, torrefaction has been commonly employed to upgrade the qualities of solid fuels made from biomass (noted as solid bio-fuel, SBF) or combustible wastes (called as solid recovered fuel, SRF) which may contain some non-biomass combustibles [5][6][7][8][9][10][11]. The improvements of torrefied SBF (SBFT) or SRF (SRFT) include enhancement of heating value, energy densification ratio (E D ), grindability, hydrophobicity and combustibility, while reduction of O/C ratio, H/C ratio and smell.…”

Section: Introductionmentioning

confidence: 99%

Emissions and By-Products from Producing Torrefied Solid Recovered Fuel Using Pulp Industry Waste

et al. 2023

View full text Add to dashboard Cite

Emissions and by-products from manufacturing torrefied solid recovered fuel using pulp industry waste containing wood waste with pulp sludge (WPS) were studied. Two batches of WPS1 and WPS2 were tested. The torrefaction of WSP1 and WPS2 were performed at their respectively optimal temperature of 573 and 593 K and time of 20 min, referred as cases WPST1-573-20 and WPST2-593-20, respectively. WPS1 contained higher fixed carbons and volatile matters but lower ash content than WPS2. The results showed that the solid yields of 56 and 61 wt.%, gas yields of 16 and 16 wt.% and liquid yields of 28 and 24 wt.% for WPST1-573-20 and WPST2-593-20, respectively. The maximal concentration of emissions for WPST1-573-20 and WPST2-593-20 are about 1952.5 and 3743.5 ppmv for CO, 26.5 and 156 ppmv for NOx and 31.5 and 392 ppmv for SO2, respectively. The CCO exceeded the emission standard and required further action. The collected non-condensable gases consisted of hydrocarbons ranging from C1-HC to C6-HC, with C4-HC being the predominant component. Here, Cn-HC represents hydrocarbons with a carbon atom count of n. The GC-MS analysis revealed the primary liquid byproducts. The liquid products can be used directly as pyroligneous liquor in agriculture. Furthermore, with refining techniques, these liquid byproducts can be transformed into high-quality chemicals for applications such as fungicides, pesticides, solvents, surfactants, and as precursors or monomers in the synthesis of other chemicals.

show abstract