On the mechanism of the potassium carbonate catalysed gasification of activated carbon: the influence of the catalyst concentration on the reactivity and selectivity at low steam pressures

Percolative composites consisting of potassium carbonate dispersed in polyvinylidene fluoride (PVDF) polymeric matrix have shown high dielectric constant and electrical conductivity due to the formation of chemically activated carbon interfaces in the composite.

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Selectivity of hydrogenation in an alkyne-alkene system on palladium catalysts modified with inorganic salts

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19840592 ◽

1984 ◽

Vol 49 (3) ◽

pp. 592-596 ◽

Cited By ~ 2

Author(s):

Libor Červený ◽

Nguyen Thi Thanh ◽

Vlastimil Růžička

Keyword(s):

Activated Carbon ◽

Calcium Carbonate ◽

Potassium Chloride ◽

Ammonium Chloride ◽

Potassium Carbonate ◽

Catalytic Hydrogenation ◽

Palladium Catalysts ◽

Inorganic Salts

The competitive catalytic hydrogenation of 2-octyne and 1-heptene in methanol has been studied on catalysts 3% Pd on activated carbon and Pd black, modified with ammonium chloride, potassium chloride, potassium carbonate, or calcium carbonate. The rates of hydrogenation of the two substrates and the rate of isomerization of 1-heptene have been determined. The effect of inorganic salts on the activity and selectivity of the catalysts is discussed.

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Role of nitrogen in pore development in activated carbon prepared by potassium carbonate activation of lignin

Applied Surface Science ◽

10.1016/j.apsusc.2016.02.200 ◽

2016 ◽

Vol 371 ◽

pp. 301-306 ◽

Cited By ~ 24

Author(s):

Naoto Tsubouchi ◽

Megumi Nishio ◽

Yuuki Mochizuki

Keyword(s):

Activated Carbon ◽

Potassium Carbonate

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Preparation of Activated Carbon of Lignin from Straw Pulping by Chemical Activation Using Potassium Carbonate

Materials Science Forum ◽

10.4028/www.scientific.net/msf.704-705.517 ◽

2011 ◽

Vol 704-705 ◽

pp. 517-522 ◽

Cited By ~ 3

Author(s):

Xiao Juan Jin ◽

Zhi Ming Yu ◽

Gao Jiang Yan ◽

Wu Yu

Keyword(s):

Methylene Blue ◽

Activated Carbon ◽

Iodine Number ◽

Surface Area ◽

Potassium Carbonate ◽

Activated Carbons ◽

Chemical Activation ◽

Bet Surface Area ◽

Chemical Agent ◽

Optimum Conditions

Activated carbons were prepared through chemical activation of lignin from straw pulping precursor using potassium carbonate as the chemical agent. Effects of activated temperature, K2CO3/lignin ratio and the activated time on the yield, Iodine number of activated carbon were investigated. Experimental results indicated that the optimum conditions were as follow: activated temperature 800°C, K3CO3(40% concentration) /lignin ratio 5: l, activated time 50min. These conditions allowed us to obtain a BET surface area of 1104 m2/g, including the external or non-microporous surface of 417 m2/g，Amount of methylene blue adsorption, Iodine number and the yield of activated carbon prepared under optimum conditions were 10.6mL/0.lg,1310 mg/g and 19.75%, respectively.

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Alcoholysis of Nyamplung Seed Oil Using Potassium Carbonate Catalyst

ASEAN Journal of Chemical Engineering ◽

10.22146/ajche.50142 ◽

2006 ◽

Vol 6 (2) ◽

pp. 66

Author(s):

Sofiyah Sofiyah

Keyword(s):

Potassium Carbonate ◽

Potassium Hydroxide ◽

Seed Oil ◽

Catalyst Concentration ◽

Order Reaction ◽

First Order ◽

Rate Of Reaction ◽

Glycerine Content ◽

Sodium And Potassium ◽

Good Agreement

The production of glycerol and ester by alcoholysis of vegetable oils has been widely studied. Various catalysts, such as sodium and potassium hydroxide and sulfuric acid have been used to increase the rate of reaction. This preliminary research studied the possibility of using potassium carbonate catalyst. The experiment was conducted in an autoclave. A certain amount of nyamplung seed oil was poured into the autoclave and then the heater was switched on to heat up the oil to the required temperature of reaction. Besides, a mixture of ethanol and potassium carbonate was heated in a flask equipped with condenser to form ethanolate. As soon as the required temperature was reached, the ethanolate was quickly put into the autoclave containing the nyamplung seed oil. The temperature of the reaction was kept constant for a period of time. At the end of each process, a sample was withdrawn and analyzed for its glycerine content by acetin method. The variables studied were reaction time and catalyst concentration. The experimental data were evaluated by applying pseudo homogeneous approach. It was found that data were in good agreement with first order reaction with respect to nyamplung seed oil. Using an equivalent ratio of 5.1 ethanol to nyamplung seed oil, a temperature of lOQoC,and an agitation speed of 150 rpm, the favorable catalyst concentration was found to be at 0.008 gram of potassium carbonate per gram of nyamplung seed oil. Under this condition, the glyceride conversion was 0.5159 in 75 min.

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