Thermodynamic behaviour of sodium and calcium based sorbents in the emission control of waste incinerators.
نویسندگان
چکیده
The dry treatment of flue gas produced by incineration processes is discussed thermodynamically. The study investigates the theoretical limits achieved by sodium and calcium based sorbents in the removal of the pollutant species HCl, NOx and SO2. Calculations were performed varying the temperature and the molar ratio between the amount of the injected alkaline sorbent and the content of the pollutant gaseous species in the flue gas. Results show that sodium cation based sorbents are more efficient than calcium based ones in the whole investigated temperature range (100-600 degrees C). The higher effectiveness of sodium based sorbents is particularly remarkable towards hydrogen chloride, whose concentration can always be reduced below the values set by the environmental regulations. Possible improvements in the treatment efficiency of combustion fumes obtainable with sodium based sorbents can be mainly summarised in a lower concentration of HCl in the treated gas and in a partial reduction of NOx concentration.
منابع مشابه
اندازه گیری بعضی آلاینده های هوای خروجی از زباله سوزهای بیمارستانی در شهر همدان در سال 1380
Background and purpose: Hospital wastes pose a serious public health problem. This is primarily caused by the way individual components of the waste is handled. One acceptable method for managing the medical waste is incineration but uncontrolled incinerators can cause emission of pollutants to atmosphere. The objective of this study was to evaluate pollutants emission from hospital waste ...
متن کاملToxic Emissions from Hospital Incinerators
I Data from large incinerators shows the potential release of dioxins, heavy metals, and acid gases as air pollutants. Hospital incinerators can present similar problems to a much greater degree, especially ,sinc-e,most of these smaller incinerators do not have effective c'ijmbustion or emission controls and their emissions are poorly dispersed. high content of plastics in the waste. potential ...
متن کاملEvaluation of the public health risks associated with semivolatile metal and dioxin emissions from hazardous waste incinerators.
The public health impacts associated with stack emissions from hazardous waste incinerators have become a major concern in recent years. Most evaluations of incinerator stack emissions have focused on three classes of compounds: metals, semivolatile, and volatile compounds. These investigations have been complicated by the difficulty and expense of analyzing the emissions and the limited amount...
متن کاملApplication of Life Cycle Assessment for Techno-Economic Evaluation of Rural Solid Waste Management Strategies: Significance of CO2 Emission Control from Waste Management Sector in Abyaneh Village, Isfahan Province
Waste disposal in the current situation, which quantity and variety of waste are increasing, needs not only effective management principles but also depends on environmentally-friendly methods to put as less environmental footprint as possible. This study aims to assess the energy consumption, emission of greenhouse gases and air pollutants which normally produce during various waste management...
متن کاملInfluences of ammonia contamination on leaching from air-pollution-control residues.
Application of selective non-catalytic reduction systems at municipal solid waste incinerators (MSWIs) often involves over-stoichiometric injection of ammonia into flue gases. Un-reacted ammonia may be deposited on fly ash particles and can ultimately influence the leaching behaviour of air-pollution-control (APC) residues. Batch tests were conducted to investigate the impacts of ammonia levels...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Chemosphere
دوره 54 7 شماره
صفحات -
تاریخ انتشار 2004