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Semantic Scholar extracted view of "Reclamation of a waste arsenic-bearing gypsum as a soil conditioner via acid treatment and subsequent Fe(II) As stabilization" by Dazhong Yang et al. ... Pyrolysis of arsenic-bearing gypsum sludge being substituted for calcium flux in smelting process. Li Xun Xing Zhu +6 authors Xin Zhang. Environmental ...
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DOI: 10.1016/J.ORGGEOCHEM.2010.04.011 Corpus ID: 95448938; The effects of calcite and montmorillonite on oil cracking in confined pyrolysis experiments @article{Pan2010TheEO, title={The effects of calcite and montmorillonite on oil cracking in confined pyrolysis experiments}, author={Changchun Pan and Lanlan Jiang and …
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The angle of repose is an intrinsic characteristic of a given material; it depends principally on: particle size, rotational speed of the kiln (Fig. 2), and surface condition of the kiln wall.More specifically, this angle characterizes the flow properties of "solid particles" in the kiln; it is often assumed to be constant but may vary along the …
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Pyrolysis experiments were carried out in ZSM-5 (10 wt%) oil shale. The results showed that the ZSM-5 catalyst reduced the shale oil yield from 9.33 wt% to 6 wt%. The content of aromatic hydrocarbons in shale oil increased from 2.88% to more than 20%. The contents of aromatic hydrocarbons of ZSM-5-25 and ZSM-5-38 are 59.39% and …
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DOI: 10.1016/J.JAAP.2018.02.002 Corpus ID: 103566386; Pyrolysis of arsenic-bearing gypsum sludge being substituted for calcium flux in smelting process …
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Hydrous pyrolysis experiments were conducted to assess the role of gypsum (0-1 wt%) on light hydrocarbon generation. • There is a positive effect on the yield of C 1 - C 4 gaseous alkanes, due to enhanced thermal cracking reactions with gypsum.. Each alkane gas becomes enriched in 13 C with gypsum, with the extent of this 13 C …
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Pyrolysis is split into fast pyrolysis and slow pyrolysis based upon heat transfer (Chand Malav et al., 2020).The primary outputs of these systems are energy, heat, bio-oil, and char. The char of pyrolysis is a source of solid fuel because it has a high calorific value ( Mukherjee et al., 2020 ).The primary benefit of pyrolysis is that it ...
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Since ABG sludge is mainly composed of gypsum and arsenic-associated compounds (arsenite and arsenate). The pyrolysis of gypsum, flue gas desulfurization (FGD) gypsum and phosphorous gypsum have been studied for the cogeneration of …
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Abstract Biochar has been proposed as a soil amendment to reclaim salt-affected soils. However, the evaluation of the different biochar types in these soils is essential due to the significant variation among biochar feedstocks. In this study, biochars from sugarcane bagasse (SB), orange bagasse (OB), and corncob (CB) were applied …
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The results show that the cumulative yield of H 2 increased by 25 % for the 900 °C gypsum-pyrolysis compared to the non-gypsum case at the same temperature and increased by up to about 50 % compared to the 800 °C non-gypsum case. Download: Download high-res image (193KB) Download: Download full-size image; Fig. 3.
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where: %O, %H, %S, %C, % Cl, %Cu = weight percentage of oxygen, hydrogen, sulphur, carbon, chlorine and cupper in the waste sample; m air = air flow rate …
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Fire_Safety_Information (PDF) Passive Fire Resistance The passive fire resistance provided by fire-resistant rated gypsum based assemblies for walls, ceilings, floors, and other building systems, slows or prevents the spread of fire, allows time for evacuation, and limits fire damage. Passive fire protection measures are intended to contain a fire and …
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In this paper, the effect of several transition metal salts such as FeCl2·4H2O, CoCl2·6H2O, NiCl2·6H2O and ZnCl2 on oil shale pyrolysis was investigated, based on thermal decomposition characteristics and product yields and compositions. The salts were added individually to Chinese Huadian oil shale by physical mixing. Pyrolysis …
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In particular, the arsenic in waste gypsum has severe environmental effects. As a hazardous waste product of the metallurgical industry, arsenic-bearing gypsum (ABG) is derived from the lime neutralization of waste acid liquor [1,2].Some amount of ABG was used in plasterboards in Japan from 1973 to 1997, and in 2017, approximately 1.5 × 10 …
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Title: Microsoft Word - GA-225-2019 2nd draft 032219.doc Author: vistastaff Created Date: 3/22/2019 9:30:16 AM
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Effect of Calcite, Kaolinite, Gypsum, and Montmorillonite on Huadian Oil Shale Kerogen Pyrolysis. Best source View on content provider's site ...
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The pyrolysis of gypsum, flue gas desulfurization (FGD) gypsum and phosphorous gypsum have been studied for the cogeneration of CaO and SO 2 or …
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3. CFD fire simulations3.1. CFD tool. The CFD code used in the simulations is the Fire Dynamics Simulator (FDS), version 6.4.0. The FDS code has been extensively validated in a large variety of fire safety related test cases [19].The Navier-Stokes equations are solved using an explicit predictor-corrector scheme, second order accurate in space …
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Figure 5 shows the impact of gypsum addition on MSW pyrolysis at (a) 800 °C and (b) 900 °C. The results reveal complete H 2 evolution in 20 min at 800 °C while it …
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Review pages 16-18 of GA-600-2021 Gypsum is approximately 21 percent, by weight, chemically combined water, which greatly contributes to its effectiveness as a fire-resistive barrier. When a gypsum panel product or gypsum plaster is exposed to fire, the water is slowly released as steam, effectively retarding heat transmission. When gypsum …
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Calcination of bauxite and gypsum – requires the elimination of water vapour from crystallisation. ... Pyrolysis also occurs in an indirect fired rotary dryer by heat treating at high temperatures but requires an oxygen deficient environment due to the generation of syngas in the process. The indirect application of heat chemically decomposes ...
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Research article Full text access Biofuel production from distillers dried grains with solubles (DDGS) co-fed with waste agricultural plastic mulching films via microwave-assisted catalytic fast pyrolysis using microwave absorbent and …
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Gypsum, a raw material used for producing Ca(OH) 2 in catalyst synthesis, and the produced Ca(OH) 2 were characterized by XRD and XRF analyses. The chemical compositions of each catalyst are tabulated in Table 1.The XRD pattern of gypsum exhibited the characteristic peaks of calcium sulfate dihydrate (CaSO 4 ·2H 2 O, …
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The pyrolysis of arsenic-bearing sludge is studied by TG-FTIR. Arsenic migration and decomposition pathway of gypsum are probed. Co-disposal method in ISASMELT …
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Mineralogically identical to natural gypsum, FGD gypsum, or synthetic gypsum, is produced from gas captured within emission control systems at coal fired electric utilities. An emission that would compromise air quality, sulfur dioxide (SO2) gas, is the primary contribution coal makes to FGD gypsum. Utilities that produce panel-grade synthetic …
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DOI: 10.1016/j.jaap.2024.106414 Corpus ID: 267737036; Gypsum-derived CaO catalytic pyrolysis of palm oil in a continuously packed bed reactor @article{Chansiriwat2024GypsumderivedCC, title={Gypsum-derived CaO catalytic pyrolysis of palm oil in a continuously packed bed reactor}, author={Wasipim …
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Pyrolysis-gas chromatography-mass spectrometry (pyrolysis-GC-MS) was performed using a 2000 Pyroprobe (CDS Analytical) fitted via a CDS 1500 valve interface. ... Effect of calcite, kaolinite, gypsum, and montmorillonite on huadian oil shale Kerogen pyrolysis. Energy Fuels, 28 (2014), pp. 1860-1867, 10.1021/ef4024417. View in …
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Modified phosphogypsum (PG) was prepared via low-temperature thermal decomposition to remove fluoride ions from wastewater. This study discussed the effect of heat treatment (pyrolysis temperature and time) and operating conditions (initial fluoride ions concentration, dosage, solution temperature, and initial pH) on fluoride ions removal …
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The regeneration of calcium oxide from gypsum is the interest of this research. Gypsum was converted to calcium oxide via a two-step process involving chemical and thermal reactions. X-ray diffraction (XRD) was used to analyse the samples to identify the samples. Laboratory grade gypsum (LG) and waste gypsum (WG) were used in this research …
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In this paper, anhydrous pyrolysis experiments were performed on Huadian oil shale kerogen with and without different minerals (calcite, kaolinite, gypsum, montmorillonite) using a Fischer assay … Expand
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