Reaction kinetics of CaC2 formation from powder and compressed feeds

The single-particle model of calcium carbide production and strengthening mechanism of the novel pelletizing process

“…众多学者利用等温法研究了不同条件下 的电石生成反应动力学. Tagawa和Sugawara [2] 和Li等 人 [3] 在粉料掺混的研究中认为应选择D 3 (三维-Jander扩 散)模型, 而El-Nass等人 [4] 和Wang等人 [5] 在粉料压块的 研究中认为应选择R 3 (体积收缩)模型. 在单颗粒炉料尺 度, 电石反应控速可能由质量扩散、热量传递和化学 反应3个因素决定.…”

Calcium‐Based Sustainable Chemical Technologies for Total Carbon Recycling

“…The phase diagram for ab inary CaO/C mixture is simple ( Figure 8), [39] but the actualp rocessesa re ratherc omplex. The mixture has ae utectic point at 2103 Ka nd 48 %C aC 2 .D espite the simplicity of the diagram and numerous published thermodynamic and kinetic modelso fc arbidem anufacturing, [21] some interesting new models [40] and other data on the subject continue to appear.T hese apply to the basics of the process, [41] and evaluatet he impacts of particular parameters:c alcium vaporization; [42] degree of granulation of the reactants (powders or cubes); [43] and the effects of variousc ontaminants, such as silicon carbide, ferrosilicon, [44] iron oxide, magnesium oxide,s ilicon oxide,a nd aluminum oxide. [45] The impurities originate from additional coke combustion inside the oven, which is done to reduce the consumption of electrical energy.…”

Towards Sustainable Carbon Return from Waste to Industry via C2-Type Molecular Unit

“…In addition to the well-established large-scale manufacturing of acetylene, carbide is also used directly, skipping gaseous acetylene, in many fundamental processes [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ]. Currently, calcium carbide is a valuable product of the chemical industry and is produced from natural limestone and fossil carbon [ 52 , 53 , 54 , 55 , 56 , 57 , 58 ]. The initial reagents in the manufacturing of carbide remained the same until, in 2010, Zhang and co-authors presented a powerful approach based on biochars [ 59 ], which were obtained by pyrolysis of biomass and successfully used instead of mined carbon.…”