Laboratory study on the high-temperature capture of HCl gas by dry-injection of calcium-based sorbents

Shemwell, B.E.; Levendis, Yiannis A.; Simons, Girard A.

doi:10.1016/s0045-6535(00)00252-6

Cited by 91 publications

(83 citation statements)

References 28 publications

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“…These studies mostly focus on the deactivation of the catalysts mainly Cu compounds with inorganic or organic N-or S-compounds Samaras et al, 2000;Xhrouet et al, 2002), and reduction of the acid chlorine resources such as HCl and Cl 2 with basic compounds such as CaO, CaCO 3 , Ca(OH) 2 , Mg(OH) 2 , NaOH, Ba(OH) 2 , BaCO 3 , etc. in MSWI (Gullett et al, 1994;Jozewicz and Gullett, 1995;Shemwell et al, 2001). The prevention of sulfur or compounds containing sulfur on PCDD/Fs formation through impacting the balance of Deacon Reaction has been reported (Raghunathan and Gullett, 1996).…”

Section: Introductionmentioning

confidence: 97%

Influence of metal oxides on PCDD/Fs formation from pentachlorophenol

et al. 2005

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The total suppressing efficiencies of several metal oxides including CaO, BaO, PbO, Ag 2 O, HgO and SnO which have lower Z/r (charge to radius ratio) <2 are all over 90%. The theories of generalized acid-base and atomic parameter (Z/r) were used to speculate the effecting mechanisms. The factors including time and temperature on suppressing efficiencies of CaO, BaO and PbO have also been studied in the present paper. The results showed that the total suppressing efficiencies of CaO, BaO and PbO increase with the increase of heated time and temperature.

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Section: Introductionmentioning

confidence: 97%

Influence of metal oxides on PCDD/Fs formation from pentachlorophenol

et al. 2005

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“…A large number of studies have been conducted regarding the possible suppressing effects of CaCO 3 and CaO on the formation of PCDD/Fs because of the ability of calcium containing compounds to bind to hydrochloric acid, thus avoiding a fraction of later chlorination and the consequent formation of PCDD/Fs (Jozewicz and Gullett, 1995;Shemwell et al, 2001;Lu et al, 2007). For example, 1033 PCDD/F formation was strongly suppressed by CaCO 3 during the incineration of polyvinyl chloride (PVC); also the HCl concentration in the flue gas significantly decreased (Sun et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Suppression of PCDD/Fs by Raw Meal in Cement Kilns

Lin

Ji²,

Zhan

et al. 2018

Aerosol Air Qual. Res.

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Raw meal of the cement production process could probably suppress the formation of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). In this study, these suppression effects were studied and compared during the co-processing of municipal solid waste (MSW) with conventional feed materials such as pure CaCO 3 , and pure CaO. A top suppression efficiency of 96% was achieved for a ratio of MSW to raw meal of 1:15. Moreover, NaCl and CuCl 2 were added to the mix of feed material and MSW, to reveal the impact of additional chlorine and cations on PCDD/F formation. Similarly, the raw meal was mixed with the kiln dust to investigate possible suppression effects of those PCDD/Fs formed through the precursor or the de novo synthesis at a temperature of 350°C. The raw meal suppressed the formation of PCDD/Fs from kiln dust. Furthermore, the raw meal could not suppress the formation of PCDD/Fs on mixtures of kiln dust and NaCl or CuCl 2 , which could be associated with a potential increase in the formation effects of PCDD/Fs on the raw meal. The results can help in potential decision-making on the applicability of certain cement kilns on the co-processing of MSW containing high levels of Cl and Cu.

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“…In a similar way Levendis et al [50] reported the relative utilization of calcium-based sorbents for the capture of HCl gas using HCl gas diluted with nitrogen, and found that the chlorination of the sorbents occurred in the hot zone of the furnace at gas residence times ∼1 s. They observed that the calcium carbonate reached a relative utilization of 54% in the mid-temperature range, while the calcium oxide reached an 80% relative utilization at the lowest temperature examined (600…”

Section: Laboratory Evaluation Of Various Carbon Composites As Hcl Somentioning

confidence: 69%

“…• C) [50]. The contact times during the present study were also less than 1 s and detailed studies on effect of gas flow rates were presented in the following sections.…”

Section: Laboratory Evaluation Of Various Carbon Composites As Hcl Somentioning

confidence: 91%