A flat panel DMFC includes an integrated cathode electrode sheet; a membrane electrode assembly unit; an intermediate bonding layer; an integrated anode electrode sheet; and a fuel container. A batch or continuous process may be used with the catalysts for transesterification of triglycerides with an alkyl alcohol to produce corresponding mono carboxylic acid esters and glycerol in high yields and purity. The device controller, coupled to a contained near field communication device, is responsive to operation mode identifier data received from the NFC device during near field communication with an external establishment to change operation from an initial mode to the operation mode linked to the received data. The filtering unit uses the rules for determining whether each data of the data set is abnormal or not.