Topic
Carbochemistry
About: Carbochemistry is a research topic. Over the lifetime, 1010 publications have been published within this topic receiving 16626 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the adverse effect of exchangeable alkali and alkaline earth metal cations such as, Na +, K + and Ca 2+, was found to reduce conversion and product quality during liquefaction of a Wyodak subbituminous coal and a North Dakota lignite.
76 citations
TL;DR: In this paper, a set of coal extracts have been characterized by FT-i.m. spectroscopy and proton n.r. bands were used to test the absorption coefficients of the coal extracts.
73 citations
TL;DR: In this article, the thermal decomposition of pyrite crystals in coal from the Prince Colliery, Cape Breton, Nova Scotia, has been studied to determine both the temperature of decomposition and the distribution of the sulphur liberated into the coal matrix.
73 citations
TL;DR: Transient (unsteadystate) kinetics, a relatively new technique for studying noncatalytic gas/solid reactions, has been used successfully to further our understanding of char (carbon) gasification as mentioned in this paper.
Abstract: Transient (unsteady-state) kinetics, a relatively new technique for studying noncatalytic gas/solid reactions, has been used successfully to further our understanding of char (carbon) gasification. It provides the unique capability of separately determining the reaction rate constant (site reactivity or turnover frequency) and the number of active sites participating in the reaction (reactive surface area). Its application to the uncatalyzed gasification of coal-derived chars and polymer-derived carbons is illustrated. In particular, the heretofore elusive quantitative understantding of their reactivity variations with conversion has been achieved for gasification in both carbon dioxide and oxygen
72 citations
TL;DR: The use of coal as a low-cost adsorbent in water and wastewater treatment processes is discussed in this article, where the authors show that although the pollutant exchange capacities of various types of coal-based adsorbents are significantly lower in comparison to other forms of adorbents, the substantially lower cost of coal shows a great potential for the utilization of coal, as a means to remove a range of pollutants from wastewater effluents.
Abstract: Coal, just like other fossil fuels such as oil and natural gas, is mainly used as a non-renewable source of energy. It is a physically unique mineral resource almost totally composed of organic matter (carbon), and a smaller percentage of elements such as hydrogen, oxygen, sulphur, and nitrogen. It is believed that underground coal deposits formed about 250–300 million years ago, when much of the Earth was a swamp covered with thick forest and plant growth. This review explores the use of coal, not as an energy source used for generating electricity, but as a low cost adsorbent in water and wastewater treatment processes. In fact, today, coal-based adsorbents still attract considerable interest in their usage. The review critically analyses the chemical composition, ion-exchange and sorption properties of coal. The use of the as-received coals, demineralized coals, sulphonated coals, calcium-loaded coals, chitosan-doped coals, activated carbon, coal fly ash, and coal fly ash derived-zeolite has also been extensively discussed. It is evident from this review that although the pollutant exchange capacities of various types of coal-based adsorbents are significantly lower in comparison to other forms of adsorbents, the substantially lower cost of coal shows a great potential for the utilization of coal as a means to remove a range of pollutants from water and wastewater effluents. However, due to the scarcity of consistent cost information, cost comparisons are difficult to make, and consequently, in this review, such comparisons were not done for the coal-based adsorbents.
70 citations