Metallic nickel has been selected as a catalyst for biomass gasification because of its activity in biomass steam gasification and tar reduction. The effects of types of promoters such as platinum, cobalt, and iron on biomass gasification were evaluated. The area of interest was the effects of preparation methods, which were impregnation and coprecipitation. Catalyst …
Natural dolomite catalysts, representing a cheap and environmentally friendly alternative to nickel-based compounds, can be used for the cracking of anthracene oil to form more valuable products. The impact of operating conditions (temperature, water/oil mass ratio, and space velocity) on the distribution and yield of pyrolysis products was investigated in a …
This study investigates the potential of light-burnt dolomite (LBD) as a supplementary cementitious material with ground granulated blast furnace slag (GGBFS) and Ordinary Portland cement (OPC). In this work, LBD was substituted for up to 20% of GGBFS in sodium sulfate-activated slag systems. The ef …
The H2SO4- treated dolomite can still be floated effectively by oleate. However, the role of H2SO4 in the adsorption of oleate onto dolomite surface remains unclear. ... Interaction of sulfuric acid with dolomite (104) surface and its impact on the adsorption of oleate anion: a DFT study ... including cookies, are used to provide services ...
The study assessed the potential of Manila Bay Dolomite Beach in the Philippines as tourism destination and how the stakeholders sustained the environmental protection of the beach. ... Journal of Marine Science and Engineering, 8(7), 509. https:// S. V. (2001). A comment concerning" developing and testing a tourism impact scale ...
3 FEASIBILITY STUDY REPORT 2018 D O L O M I T E P R O C E S S I N G P L A N T Page 3 I. EXECUTIVE SUMMARY The proposed project intends to setup in Tigray Regin, Adigrat Town and will be able to produce 10,000 tons of Dolomite powder per year. The Rated plant capacity is 10,000 tons of Dolomite powder per annum working on 8 Hours single shift. The plant will …
In recent years, artificial intelligence (AI) and automation technologies have gained significant traction and are poised to reshape various industries, including engineering. The integration of these advanced technologies into the engineering field is already yielding tangible benefits and creating new challenges. This blog post aims to provide an overview of the …
Waste dolomite powder, a widely available industrial byproduct, has recently gained attention as a potential supplementary cementitious material. However, its inert reactivity …
Self-compacting concrete (SCC), known for its excellent fluidity and self-compacting ability, is widely used in civil engineering. To enhance the comprehensive performance of SCC, dolomite powder (DP) is integrated as a substitute for cement. This study aims to analyze the impact of DP on the yield stress relationship between self-compacting …
The dolomite in the Yuntai Mountain, Shibing, Guizhou, China constitutes the gentle stratum, affected by several weathering processes. It is coupled with a vertical joint development, which makes it easy to form the collapse and stone peaks corroded by running water. The aim of this paper is to study the effects of weathering processes of dolomite …
Adverse Effects of Dolomite on Manila Bay The Manila Bay was dumped with dolomite sand for the apparently "beautification" and "cleanliness" of the Baywalk. However, it's all delusion. Dolomite sands are more commonly used in road construction and not as sand beaches. Additionally, the use of dolomite sand can cause adverse effects on people's health and the …
Equation () is the Viscoelastic Constitutive Model (VECM), which only considers the functional relationship between vertical stress and the time of rock in a unidirectional stress state.3.2 Modified Viscoelastic Differential Constitutive Model. Through a large number of laboratory tests on bedded dolomite, it was found that the rock samples showed axial …
Chengde chromium-bearing vanadium–titanium magnetite (CCVTM) has been used as an important mineral resource in sinter making. The MgO content of this sinter can be enhanced by adding dolomite, which improved operation of the blast furnace. The effects of MgO in the form of dolomite on metallurgical properties, microstructure and mineral …
AbstractThis study compared two binder systems composed of reactive magnesite cement (RMC) and calcined dolomite (D800), which were produced via the calcination of magnesite and dolomite at 800°C, respectively. The environmental impacts of the production ...
This study focused on the effects of dolomite powder on the properties of C30 and C50 concretes. The microstructure, splitting tensile strength, compressive strength and fracture toughness property of concretes incorporating dolomite powder were measured by mercury intrusion porosimetry (MIP), pressure testing machine and universal testing machine.
This paper provides the effect of dolomite waste on various properties (fresh, mechanical, and durability) of concrete, analyzes the crucial findings of dolomite waste based …
The results suggest that textural factors have a greater influence on the engineering properties of dolomite than mineralogical composition. It was also revealed that the crystal size (fine to coarse) is a textural element and that it has a significant impact on the mechanical and physical properties of the dolomite under investigation.
The results suggest that textural factors have a greater influence on the engineering properties of dolomite than mineralogical composition. It was also revealed that the crystal size (fine to …
1. Introduction. Phosphate rock is the basic material used in the manufacturing of phosphate fertilizers and phosphorous chemical products. Its products are widely used in agriculture, chemical industry, national defense, and other fields [1], [2].Phosphate ore deposits are abundant in China, although there are few rich ores and considerable lean ores.
From DTA and isothermal studies, it is evident that the temperature of decomposition of dolomite is reduced and that the rate of decomposition is enhanced relative to pure dolomite when small amounts of fluoride salts, e.g., LiF, NaF, MgF 2 and CaF 2 are mixed with the dolomite powder. From X-ray analysis pure dolomite is seen to decompose directly into CaO and MgO but …
Zeta potential measurements and microscopic surface characterization and imaging were conducted on calcite and dolomite crystals aged in stearic acid model oil and exposed to different synthetic brines representing different potential scenarios of injected seawater from the Arabian Gulf. Calcite particles were negatively charged in deionized water and maintained negative …
The dissolution of the dolomite gives rise to cave systems and voids in the rock. Soils covering the rock can collapse into these caves or voids resulting in catastrophic ground movement on …
The effectiveness of dolomite as a catalyst for accelerating the gasification rate of different mixtures of sawdust with coal is assessed in this section by using air as the gasifying medium with a constant volume flow rate of 17.4 Nm 3 /h. Feed materials comprise 5–25% mixtures with a 10% dolomite additive.
Given that South Africa is partly underlain by dolomite (approximately 5–10% of the country's land surface), regulating the development of "dolomitic land" is key to sustainable land use. ... (no. 16 of 2010), the Engineering and Geohazards Competency of the Council for Geoscience is required, amongst other things to (1) advise local ...
More than four million people work or reside on dolomite land in South Africa and it is therefore important to be able to construct safely on dolomite land and to minimise the risk of damage to...
"Karst" refers to the typi-cal landforms and processes in areas that are underlain by dolomite (calcium/magnesium carbonate) rock. These rocks can dissolve in the presence of water …
The point load strength test index (Is(50)) rapidly determines the tensile strength and the uniaxial compressive strength of rocks. It is necessary to analyze the power index (m) of Is(50) when conducting a point load test (PLT) on irregular rock blocks. In this study, sandy dolomites from the Sinian Dengying Formation (Zbdn) and Doushantuo Formation (Zbd) in the …
The effects of hydrochloric acid on the elastic and mechanical properties of tight dolomite have been assessed under triaxial stress in the laboratory. Tight dolomite were divided into acid-treatment and un-treatment groups. During the acid-treatment process, samples were exposed to hydrochloric acid in the reaction kettle with different acid ...
Calcite and dolomite mining have created numerous environmental problems such as destruction of landscape, damage to natural drainage, pollution and destruction of natural habitats in Igara region ...
It remains controversial whether the influence of hydrothermal fluids on dolomite reservoirs is dominated by dissolution or precipitation. In this study, the influence of multistage hydrothermal fluids on the dolomite reservoirs of the Lower Ordovician Yeli-Liangjiashan Formation in the Chengdao-Zhuanghai area was investigated based on petrographic …
Dolomite Beach, also known as Manila's first man-made beach, is a fake sand beach formed through the process of nourishment on Manila Bay in Manila, Philippines. This is a new addition to Manila ...
A distillation fraction of a coal-derived liquid (tar) was cracked over a char−dolomite mixture, calcined dolomite, and silicon carbide in a fixed-bed reactor. The char−dolomite mixture (FWC) was produced from Pittsburgh No. 8 coal and dolomite in a Foster Wheeler carbonizer. The experiments were conducted under nitrogen and simulated coal gas …