Simulation of methane steam reforming enhanced by in situ CO2 sorption utilizing K2CO3 promoted hydrotalcites for H2 production

• Type: Article in International Conference Proceedings Book
• Date: 2012

Authors

Chanburanasiri, N (Author) Other; Ana M. Ribeiro (Author) FEUP; Alírio Rodrigues (Author) FEUP; Laosiripojana, N (Author) Other; Assabumrungrat, S (Author) Other

Conference proceedings International

Title: AIChE 2012 - 2012 AIChE Annual Meeting, Conference Proceedings

2012 AIChE Annual Meeting, AIChE 2012

Pittsburgh, PA, 28 October 2012 through 2 November 2012

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: P-008-8CQ

Abstract (EN): The hydrogen production performance of sorption enhanced methane steam reforming (SEMSR) was investigated in this study. Three different K2CO3 promoted hydrotalcites (HTC) including HTC A: industrial K2CO3 promoted HTC reported in the work of Ding and Alpay, HTC B: commercial HTC from SASOL impregnated with K2CO3 in the work of Oliveira et al., and HTC C: commercial K2CO3 promoted HTC from SASOL, were considered. A set of experiments was carried out to measure of CO2 adsorption on HTC C and a 1-D heterogeneous dynamic fixed bed reactor mathematical model was developed to simulate the performance of SEMSR. It was observed that the CO2 adsorption characteristics were different among the HTCs, resulting in different sorption enhanced characteristic curves. The reaction period that can be operated to produce the high purity hydrogen (>98%) depends on the sorbent type and operating condition. The system utilizing HTC B offers the best performance with the pre-breakthrough period of 116.67 min at the operating condition: FCH4 = 0.1656 mmol/min, T = 773 K, P = 0.2 MPa, S/C = 11.5 and catalyst/total solid = 0.05 while the system with HTC A offers 33.33 min that is better than 8.33 min of HTC C. For HTC B, the increase of steam to methane (S/C) ratio leads to the increase of the pre-breakthrough period. The increase of pressure results in the increase of the time before breakthrough when the S/C value is higher than 11.5 at 773 K and 6.143 at 863 K. The temperature of 863 K is suitable for the operation at a low S/C value while the temperature of 773 K is appropriate for higher S/C values.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8