The carbon dioxide reforming of methane to synthesis gas under DC-pulsed plasma was investigated. The effects of specific input energy and feed ratio on the product distribution and also feed conversion was studied. At the input energy of about 11 eV/ molecule per methane and/or carbon dioxide the feed conversion of 38% for CH 4 and 28% for CO 2 and product selectivity of 74% has been attained for H 2 and CO at feed flow rate of 90 ml/min. The energy consumption in this work displays potential to further study and optimization of the process. The importance of the electron impact reactions in the process was discussed. The results show that by prudent tuning of system variables, the process be able to run in the way of synthesis gas, instead of hydrocarbon production.

The solubilities of carbon dioxide are reported in mixed solvents containing (1.68 to 3.00) kmol/m 3 (Nmethyldiethanolamine), (0.36 to 1.36) kmol/m 3 (piperazine), (0.36 to 1.36) kmol/m 3 (tetramethylensulfone or sulfolane), and water for temperatures from (40 to 70)°C and CO 2 partial pressures in the range of (30 to 3900) kPa. The results show that piperazine has an effect on the CO 2 solubility and sulfolane behaves as a physical solvent.

The new data for solubility of carbon dioxide are reported in mixed solvents containing (2.00 to 2.50 kmol/m 3 ) Diisopropanolamine (DIPA), (0.86 to 1.36) kmol/m 3 ) Piperazine (PZ), (0.86 to 1.36) kmol/m 3 ) N-methyldiethanolamine (MDEA) and water, keeping the amine total concentration in the aqueous solution at 3.36 kmol/m 3 for temperatures from (40 to 70)°C and CO 2 partial pressures in the range of (30 to 5000) kPa. Experimental solubility results were represented by the mole ratio of CO 2 per total amine in the liquid mixture. Results show that at a given partial pressure of CO 2 the solubility of CO 2 in the DIPA solutions is lower than solubility in MDEA or PZ solutions and the CO 2 loading increased with decreasing temperature and increasing CO 2 partial pressure.

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