National Institute of Clean-and-low-carbon Energy

China Energy Investment Corporation Limited

Wenqiang Xu

Wenbin Liang

Chang Wei

Qinghua Liu

John P Lemmon

Yonglong Li

Youzong Gu

A flow battery field, an electrode slurry, a slurry electrode, a flow battery, and a stack are disclosed. The electrode slurry comprising electrode particles and electrolyte that contains active substance. Based on 100 pbw active substance, the electrode particles are 10-1,000 pbw. The slurry electrode comprises: a bipolar plate, a current collector, and a slurry electrode reservoir configured to store electrode slurry. In the two opposite sides of the bipolar plate, one side is adjacent to the current collector, and the other side is arranged with a slurry electrode cavity, and flow channels are arranged and extended between the bipolar plate and the slurry electrode cavity, so that the electrode slurry is circulated between the slurry electrode cavity and the slurry electrode reservoir. A flow battery that employs the electrode slurry can provide higher and more stable power output under the same current condition and is lower in cost.

Electrode slurry, slurry electrode, flow battery and stack

The invention relates to gas separation, particularly to a process for separating COfrom a COcontaining gas stream with varying COconcentration using a membrane-based separation system. The process for separating COcomprises: (i) feeding the COcontaining gas stream into a membrane-based separation system comprising one or more membrane stages in-line, each membrane stage producing a CO-depleted retentate stream and a rich COpermeate stream, and (ii) recycling a part of the CO-rich permeate stream from at least one membrane stage as a recycled stream, into a preceding feed stream of one or more membrane stages in the membrane-based separation system to adjust the COconcentration of the feed stream. The process could stabilize the COconcentration in the feed steam by recirculation of a fraction of the high purity COpermeate to the feed of the membrane system, which would result in a lower incremental auxiliary load than other options such as compression of the entire gas stream.

Process for separating CO2 from CO2 containing gas stream

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Beijing, China

Wenqiang Xu